Categories
Ailmemts & Remedies

Stroke (Cerebrovascular Accident)

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Definition:
A stroke occurs when the blood supply to the brain is disturbed in some way. As a result, brain cells are starved of oxygen causing some cells to die and leaving other cells damaged.

Types of stroke:
Most strokes occur when a blood clot blocks one of the arteries (blood vessels) that carries blood to the brain. This type of stroke is called an ischaemic stroke.…….click & see

  • Transient ischaemic attack (TIA) is a short-term stroke that lasts for less than 24 hours. The oxygen supply to the brain is restored quickly, and symptoms of the stroke disappear completely. A transient stroke needs prompt medical attention as it is a warning of serious risk of a major stroke.

  • Cerebral thrombosis occurs when a blood clot (thrombus) forms in an artery (blood vessel) supplying blood to the brain. Furred-up blood vessels with fatty patches of atheroma (arteriosclerosis) may make a thrombosis more likely. The clot interrupts the blood supply and brain cells are starved of oxygen.

  • Cerebral embolism is a blood clot that forms somewhere in the body before travelling through the blood vessels and lodging in the brain. This causes the brain cells to become starved of oxygen. An irregular heartbeat or recent heart attack may make you prone to forming emboli.

  • Cerebral haemorrhage occurs when a blood vessel bursts inside the brain and bleeds (haemorrhages). With a haemorrhage, extra damage is done to the brain tissue by the blood that seeps into it.

Diagnostic methods for stroke

Effects of a stroke:
No two strokes are the same and people can be affected in quite different ways. This partly depends on which area of the brain is damaged, because different parts control different abilities such as speaking, memory, swallowing and moving.

  • Strokes usually occur suddenly.

  • The most common signs of a stroke are weakness, paralysis or numbness of the arm and leg.

  • Speech may be difficult or become difficult to understand.

  • Swallowing may be affected. Until this improves, patients may be fed by a tube or given fluids into a vein (intravenously) to avoid food going into the lungs.

  • People who have had severe strokes may lose consciousness. Unfortunately, the likelihood of such patients making a good recovery are poor.

Signs and symptoms of stroke

Treatment:
In the first few days after a stroke, treatment involves ensuring that the patient is well hydrated and nourished. The next phase of treatment – recovery through rehabilitation – involves a team of health professionals including physiotherapists, speech therapists, occupational therapists, nurses and doctors.

If a stroke is caused by a blood clot, then taking a low-dose aspirin (eg Nu-seals 75mg) once a day may help make the blood less sticky and less likely to cause clots.

Treatment options for stroke

Risk Factors:

  • High blood pressure (hypertension) does not cause any symptoms, so everyone over the age of 40 should have an annual blood pressure check.

  • Smokers have double the risk of stroke as non-smokers.

  • Irregular heart beat (atrial fibrillation) is fairly common in old age, and increases the risk of stroke by causing blood clots to form in the heart. Blood clots can be prevented from forming by taking warfarin, a medicine that makes the blood less likely to clot. Warfarin (eg Marevan) treatment requires careful monitoring with regular blood checks and is a very effective way to reduce the risk of stroke.

  • Diabetes affects 1 in 20 older people, and can also increase the risk of having a stroke. Good control of diabetes is important and requires attention to diet, regular urine tests or blood tests, and probably some medication.

  • Too much alcohol increases the risk of a stroke. The recommended ‘safe’ limits for alcohol consumption are 21 units each week for women and 28 units each week for men. One unit of alcohol is equivalent to a measure of spirits, or a glass of wine, or half a pint of beer. People who drink more than this run a higher risk of stroke, liver disease and dementia.

Prevention methods for stroke
Ongoing research regarding stroke.

Alternative preventive medication

Studies reveal Yoga increases GABA (gamma-aminobutyric) levels

Stroke – Prevention & Curing Protocol

Disclaimer: This information is not meant to be a substitute for professional medical advise or help. It is always best to consult with a Physician about serious health concerns. This information is in no way intended to diagnose or prescribe remedies.This is purely for educational purpose

Sources:http://www.netdoctor.co.uk/diseases/facts/stroke.htm

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Categories
Ailmemts & Remedies

Constipation

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Constipation is defined as having a bowel movement fewer than three times per week. With constipation stools are usually hard, dry, small in size, and difficult to eliminate. Some people who are constipated find it painful to have a bowel movement and often experience straining, bloating, and the sensation of a full bowel.

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Some people think they are constipated if they do not have a bowel movement every day. However, normal stool elimination may be three times a day or three times a week, depending on the person.

Constipation is a symptom, not a disease. Almost everyone experiences constipation at some point in their life, and a poor diet typically is the cause. Most constipation is temporary and not serious. Understanding its causes, prevention, and treatment will help most people find relief.

Who gets constipated?

Constipation is one of the most common gastrointestinal complaints in the United States. More than 4 million Americans have frequent constipation, accounting for 2.5 million physician visits a year. Those reporting constipation most often are women and adults ages 65 and older. Pregnant women may have constipation, and it is a common problem following childbirth or surgery.

Self-treatment of constipation with over-the-counter (OTC) laxatives is by far the most common aid. Around $725 million is spent on laxative products each year in America.

What causes constipation?

To understand constipation, it helps to know how the colon, or large intestine, works. As food moves through the colon, the colon absorbs water from the food while it forms waste products, or stool. Muscle contractions in the colon then push the stool toward the rectum. By the time stool reaches the rectum it is solid, because most of the water has been absorbed.

Constipation occurs when the colon absorbs too much water or if the colon’s muscle contractions are slow or sluggish, causing the stool to move through the colon too slowly. As a result, stools can become hard and dry. Common causes of constipation are

  • not enough fiber in the diet
  • lack of physical activity (especially in the elderly)
  • medications
  • milk
  • irritable bowel syndrome
  • changes in life or routine such as pregnancy, aging, and travel
  • abuse of laxatives
  • ignoring the urge to have a bowel movement
  • dehydration
  • specific diseases or conditions, such as stroke (most common)
  • problems with the colon and rectum
  • problems with intestinal function (chronic idiopathic constipation)

Not Enough Fiber in the Diet

People who eat a high-fiber diet are less likely to become constipated. The most common causes of constipation are a diet low in fiber or a diet high in fats, such as cheese, eggs, and meats.

Fiber   both soluble and insoluble is the part of fruits, vegetables, and grains that the body cannot digest. Soluble fiber dissolves easily in water and takes on a soft, gel-like texture in the intestines. Insoluble fiber passes through the intestines almost unchanged. The bulk and soft texture of fiber help prevent hard, dry stools that are difficult to pass.

Americans eat an average of 5 to 14 grams of fiber daily,   which is short of the 20 to 35 grams recommended by the American Dietetic Association. Both children and adults often eat too many refined and processed foods from which the natural fiber has been removed.

A low-fiber diet also plays a key role in constipation among older adults, who may lose interest in eating and choose foods that are quick to make or buy, such as fast foods, or prepared foods, both of which are usually low in fiber. Also, difficulties with chewing or swallowing may cause older people to eat soft foods that are processed and low in fiber.

Not Enough Liquids

Research shows that although increased fluid intake does not necessarily help relieve constipation, many people report some relief from their constipation if they drink fluids such as water and juice and avoid dehydration. Liquids add fluid to the colon and bulk to stools, making bowel movements softer and easier to pass. People who have problems with constipation should try to drink liquids every day. However, liquids that contain caffeine, such as coffee and cola drinks will worsen one’s symptoms by causing dehydration. Alcohol is another beverage that causes dehydration. It is important to drink fluids that hydrate the body, especially when consuming caffeine containing drinks or alcoholic beverages.

Lack of Physical Activity

A lack of physical activity can lead to constipation, although doctors do not know precisely why. For example, constipation often occurs after an accident or during an illness when one must stay in bed and cannot exercise. Lack of physical activity is thought to be one of the reasons constipation is common in older people.

Medications

Some medications can cause constipation, including

  • pain medications (especially narcotics)
  • antacids that contain aluminum and calcium
  • blood pressure medications (calcium channel blockers)
  • antiparkinson drugs
  • antispasmodics
  • antidepressants
  • iron supplements
  • diuretics
  • anticonvulsants

Changes in Life or Routine

During pregnancy, women may be constipated because of hormonal changes or because the uterus compresses the intestine. Aging may also affect bowel regularity, because a slower metabolism results in less intestinal activity and muscle tone. In addition, people often become constipated when traveling, because their normal diet and daily routine are disrupted.

Abuse of Laxatives

The common belief that people must have a daily bowel movement has led to self-medicating with OTC laxative products. Although people may feel relief when they use laxatives, typically they must increase the dose over time because the body grows reliant on laxatives in order to have a bowel movement. As a result, laxatives may become habit-forming.

Ignoring the Urge to Have a Bowel Movement

People who ignore the urge to have a bowel movement may eventually stop feeling the need to have one, which can lead to constipation. Some people delay having a bowel movement because they do not want to use toilets outside the home. Others ignore the urge because of emotional stress or because they are too busy. Children may postpone having a bowel movement because of stressful toilet training or because they do not want to interrupt their play.

Specific Diseases

Diseases that cause constipation include neurological disorders, metabolic and endocrine disorders, and systemic conditions that affect organ systems. These disorders can slow the movement of stool through the colon, rectum, or anus.

Conditions that can cause constipation are found below.

Problems with the Colon and Rectum

Intestinal obstruction, scar tissue—also called adhesions—diverticulosis, tumors, colorectal stricture, Hirschsprung’s disease, or cancer can compress, squeeze, or narrow the intestine and rectum and cause constipation.

Problems with Intestinal Function

The two types of constipation are idiopathic constipation and functional constipation. Irritable bowel syndrome (IBS) with predominant symptoms of constipation is categorized separately.

Idiopathic—of unknown origin—constipation does not respond to standard treatment.

Functional constipation means that the bowel is healthy but not working properly. Functional constipation is often the result of poor dietary habits and lifestyle. It occurs in both children and adults and is most common in women. Colonic inertia, delayed transit, and pelvic floor dysfunction are three types of functional constipation. Colonic inertia and delayed transit are caused by a decrease in muscle activity in the colon. These syndromes may affect the entire colon or may be confined to the lower, or sigmoid, colon.

Pelvic floor dysfunction is caused by a weakness of the muscles in the pelvis surrounding the anus and rectum. However, because this group of muscles is voluntarily controlled to some extent, biofeedback training is somewhat successful in retraining the muscles to function normally and improving the ability to have a bowel movement.

Functional constipation that stems from problems in the structure of the anus and rectum is known as anorectal dysfunction, or anismus. These abnormalities result in an inability to relax the rectal and anal muscles that allow stool to exit.

People with IBS having predominantly constipation also have pain and bloating as part of their symptoms.

How is the cause of constipation identified?

The tests the doctor performs depend on the duration and severity of the constipation, the person’s age, and whether blood in stools, recent changes in bowel habits, or weight loss have occurred. Most people with constipation do not need extensive testing and can be treated with changes in diet and exercise. For example, in young people with mild symptoms, a medical history and physical exam may be all that is needed for diagnosis and treatment.

Medical History

The doctor may ask a patient to describe his or her constipation, including duration of symptoms, frequency of bowel movements, consistency of stools, presence of blood in the stool, and toilet habits—how often and where one has bowel movements. A record of eating habits, medication, and level of physical activity will also help the doctor determine the cause of constipation.

The clinical definition of constipation is having any two of the following symptoms for at least 12 weeks—not always consecutive—in the previous 12 months:

  • straining during bowel movements
  • lumpy or hard stool
  • sensation of incomplete evacuation
  • sensation of anorectal blockage/obstruction
  • fewer than three bowel movements per week

Physical Examination

A physical exam may include a rectal exam with a gloved, lubricated finger to evaluate the tone of the muscle that closes off the anus—also called anal sphincter—and to detect tenderness, obstruction, or blood. In some cases, blood and thyroid tests may be necessary to look for thyroid disease and serum calcium or to rule out inflammatory, metabolic, and other disorders.

Extensive testing usually is reserved for people with severe symptoms, for those with sudden changes in the number and consistency of bowel movements or blood in the stool, and older adults. Additional tests that may be used to evaluate constipation include

  • a colorectal transit study
  • anorectal function tests
  • a defecography

Because of an increased risk of colorectal cancer in older adults, the doctor may use tests to rule out a diagnosis of cancer, including a

  • barium enema x ray
  • sigmoidoscopy or colonoscopy

Colorectal transit study. This test shows how well food moves through the colon. The patient swallows capsules containing small markers that are visible on an x ray. The movement of the markers through the colon is monitored by abdominal x rays taken several times 3 to 7 days after the capsule is swallowed. The patient eats a high-fiber diet during the course of this test.

Anorectal function tests. These tests diagnose constipation caused by abnormal functioning of the anus or rectum—also called anorectal function.

  • Anorectal manometry evaluates anal sphincter muscle function. For this test, a catheter or air-filled balloon is inserted into the anus and slowly pulled back through the sphincter muscle to measure muscle tone and contractions.
  • Balloon expulsion tests consist of filling a balloon with varying amounts of water after it has been rectally inserted. Then the patient is asked to expel the balloon. The inability to expel a balloon filled with less than 150 mL of water may indicate a decrease in bowel function.

Defecography is an x ray of the anorectal area that evaluates completeness of stool elimination, identifies anorectal abnormalities, and evaluates rectal muscle contractions and relaxation. During the exam, the doctor fills the rectum with a soft paste that is the same consistency as stool. The patient sits on a toilet positioned inside an x-ray machine, then relaxes and squeezes the anus to expel the paste. The doctor studies the x rays for anorectal problems that occurred as the paste was expelled.

Barium enema x ray. This exam involves viewing the rectum, colon, and lower part of the small intestine to locate problems. This part of the digestive tract is known as the bowel. This test may show intestinal obstruction and Hirschsprung’s disease, which is a lack of nerves within the colon.

The night before the test, bowel cleansing, also called bowel prep, is necessary to clear the lower digestive tract. The patient drinks a special liquid to flush out the bowel. A clean bowel is important, because even a small amount of stool in the colon can hide details and result in an incomplete exam.

Because the colon does not show up well on x rays, the doctor fills it with barium, a chalky liquid that makes the area visible. Once the mixture coats the inside of the colon and rectum, x rays are taken that show their shape and condition. The patient may feel some abdominal cramping when the barium fills the colon but usually feels little discomfort after the procedure. Stools may be white in color for a few days after the exam.

Sigmoidoscopy or colonoscopy. An examination of the rectum and lower, or sigmoid, colon is called a sigmoidoscopy. An examination of the rectum and entire colon is called a colonoscopy.

The person usually has a liquid dinner the night before a colonoscopy or sigmoidoscopy and takes an enema early the next morning. An enema an hour before the test may also be necessary.

To perform a sigmoidoscopy, the doctor uses a long, flexible tube with a light on the end, called a sigmoidoscope, to view the rectum and lower colon. The patient is lightly sedated before the exam. First, the doctor examines the rectum with a gloved, lubricated finger. Then, the sigmoidoscope is inserted through the anus into the rectum and lower colon. The procedure may cause abdominal pressure and a mild sensation of wanting to move the bowels. The doctor may fill the colon with air to get a better view. The air can cause mild cramping.

To perform a colonoscopy, the doctor uses a flexible tube with a light on the end, called a colonoscope, to view the entire colon. This tube is longer than a sigmoidoscope. During the exam, the patient lies on his or her side, and the doctor inserts the tube through the anus and rectum into the colon. If an abnormality is seen, the doctor can use the colonoscope to remove a small piece of tissue for examination (biopsy). The patient may feel gassy and bloated after the procedure.

How is constipation treated?

Although treatment depends on the cause, severity, and duration of the constipation, in most cases dietary and lifestyle changes will help relieve symptoms and help prevent them from recurring.

Diet

A diet with enough fiber (20 to 35 grams each day) helps the body form soft, bulky stool. A doctor or dietitian can help plan an appropriate diet. High-fiber foods include beans, whole grains and bran cereals, fresh fruits, and vegetables such as asparagus, brussels sprouts, cabbage, and carrots. For people prone to constipation, limiting foods that have little or no fiber, such as ice cream, cheese, meat, and processed foods, is also important.

IF YOU EAT  KAFIR DAILY IT WILL BE A GREAT HELP TO CLEAN YOUR GUT

Lifestyle Changes

Other changes that may help treat and prevent constipation include drinking enough water and other liquids, such as fruit and vegetable juices and clear soups, so as not to become dehydrated, engaging in daily exercise, and reserving enough time to have a bowel movement. In addition, the urge to have a bowel movement should not be ignored.

Laxatives

Most people who are mildly constipated do not need laxatives. However, for those who have made diet and lifestyle changes and are still constipated, a doctor may recommend laxatives or enemas for a limited time. These treatments can help retrain a chronically sluggish bowel. For children, short-term treatment with laxatives, along with retraining to establish regular bowel habits, helps prevent constipation.

A doctor should determine when a patient needs a laxative and which form is best. Laxatives taken by mouth are available in liquid, tablet, gum powder, and granule forms. They work in various ways:

  • Bulk-forming laxatives generally are considered the safest, but they can interfere with absorption of some medicines. These laxatives, also known as fiber supplements, are taken with water. They absorb water in the intestine and make the stool softer. Brand names include Metamucil, Fiberall, Citrucel, Konsyl, and Serutan. These agents must be taken with water or they can cause obstruction. Many people also report no relief after taking bulking agents and suffer from a worsening in bloating and abdominal pain.
  • Stimulants cause rhythmic muscle contractions in the intestines. Brand names include Correctol, Dulcolax, Purge, and Senokot. Studies suggest that phenolphthalein, an ingredient in some stimulant laxatives, might increase a person’s risk for cancer. The Food and Drug Administration has proposed a ban on all over-the-counter products containing phenolphthalein. Most laxative makers have replaced, or plan to replace, phenolphthalein with a safer ingredient.
  • Osmotics cause fluids to flow in a special way through the colon, resulting in bowel distention. This class of drugs is useful for people with idiopathic constipation. Brand names include Cephulac, Sorbitol, and Miralax. People with diabetes should be monitored for electrolyte imbalances.
  • Stool softeners moisten the stool and prevent dehydration. These laxatives are often recommended after childbirth or surgery. Brand names include Colace and Surfak. These products are suggested for people who should avoid straining in order to pass a bowel movement. The prolonged use of this class of drugs may result in an electrolyte imbalance.
  • Lubricants grease the stool, enabling it to move through the intestine more easily. Mineral oil is the most common example. Brand names include Fleet and Zymenol. Lubricants typically stimulate a bowel movement within 8 hours.
  • Saline laxatives act like a sponge to draw water into the colon for easier passage of stool. Brand names include Milk of Magnesia and Haley’s M-O. Saline laxatives are used to treat acute constipation if there is no indication of bowel obstruction. Electrolyte imbalances have been reported with extended use, especially in small children and people with renal deficiency.
  • Chloride channel activators increase intestinal fluid and motility to help stool pass, thereby reducing the symptoms of constipation. One such agent is Amitiza, which has been shown to be safely used for up to 6 to 12 months. Thereafter a doctor should assess the need for continued use.

People who are dependent on laxatives need to slowly stop using them. A doctor can assist in this process. For most people, stopping laxatives restores the colon’s natural ability to contract.

Other Treatments

Treatment for constipation may be directed at a specific cause. For example, the doctor may recommend discontinuing medication or performing surgery to correct an anorectal problem such as rectal prolapse, a condition in which the lower portion of the colon turns inside out.

People with chronic constipation caused by anorectal dysfunction can use biofeedback to retrain the muscles that control bowel movements. Biofeedback involves using a sensor to monitor muscle activity, which is displayed on a computer screen, allowing for an accurate assessment of body functions. A health care professional uses this information to help the patient learn how to retrain these muscles.

Surgical removal of the colon may be an option for people with severe symptoms caused by colonic inertia. However, the benefits of this surgery must be weighed against possible complications, which include abdominal pain and diarrhea.

Ayurvedic and Herbal Treatment Of Constipation…………….(A)…….(B)……(C)……(D)

Chiropractic may Correct Chronic Constipation

How Supplements Can Help to get read of Constipation

Can constipation be serious?

Sometimes constipation can lead to complications. These complications include hemorrhoids, caused by straining to have a bowel movement, or anal fissures—tears in the skin around the anus—caused when hard stool stretches the sphincter muscle. As a result, rectal bleeding may occur, appearing as bright red streaks on the surface of the stool. Treatment for hemorrhoids may include warm tub baths, ice packs, and application of a special cream to the affected area. Treatment for anal fissures may include stretching the sphincter muscle or surgically removing the tissue or skin in the affected area.

Sometimes straining causes a small amount of intestinal lining to push out from the anal opening. This condition, known as rectal prolapse, may lead to secretion of mucus from the anus. Usually eliminating the cause of the prolapse, such as straining or coughing, is the only treatment necessary. Severe or chronic prolapse requires surgery to strengthen and tighten the anal sphincter muscle or to repair the prolapsed lining.

Constipation may also cause hard stool to pack the intestine and rectum so tightly that the normal pushing action of the colon is not enough to expel the stool. This condition, called fecal impaction, occurs most often in children and older adults. An impaction can be softened with mineral oil taken by mouth and by an enema. After softening the impaction, the doctor may break up and remove part of the hardened stool by inserting one or two fingers into the anus.

Hope Through Research

The Division of Digestive Diseases and Nutrition at the National Institute of Diabetes and Digestive and Kidney Diseases supports basic and clinical research into gastrointestinal conditions, including constipation. Researchers are studying the anatomical and physiological characteristics of rectoanal motility and the use of new medications and behavioral techniques, such as biofeedback, to treat constipation.

Points to Remember

  • Constipation affects almost everyone at one time or another.
  • Many people think they are constipated when, in fact, their bowel movements are regular.
  • The most common causes of constipation are poor diet and lack of exercise.
  • Other causes of constipation include medications, irritable bowel syndrome, abuse of laxatives, and specific diseases.
  • A medical history and physical exam may be the only diagnostic tests needed before the doctor suggests treatment.
  • In most cases, following these simple tips will help relieve symptoms and prevent recurrence of constipation:
    • Eat a well-balanced, high-fiber diet that includes beans, bran, whole grains, fresh fruits, and vegetables.
    • Drink plenty of liquids.
    • Exercise regularly.
    • Set aside time after breakfast or dinner for undisturbed visits to the toilet.
    • Do not ignore the urge to have a bowel movement.
    • Understand that normal bowel habits vary.
    • Whenever a significant or prolonged change in bowel habits occurs, check with a doctor.
  • Most people with mild constipation do not need laxatives. However, a doctor may recommend laxatives for a limited time for people with chronic constipation.

For More Information

International Foundation for Functional Gastrointestinal Disorders
P.O. Box 170864
Milwaukee, WI 53217
Phone: 1–888–964–2001 or 414–964–1799
Fax: 414–964–7176
Email: iffgd@iffgd.org
Internet: www.iffgd.org

American Gastroenterological Association
National Office
4930 Del Ray Avenue
Bethesda, MD 20814
Phone: 301–654–2055
Fax: 301–654–5920
Email: member@gastro.org
Internet: www.gastro.org

Disclaimer: This information is not meant to be a substitute for professional medical advise or help. It is always best to consult with a Physician about serious health concerns. This information is in no way intended to diagnose or prescribe remedies

Resources:http://digestive.niddk.nih.gov/ddiseases/pubs/constipation/index.

Categories
Health Alert

Smoking Damages Lung Cells

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Researchers have revealed that an unexplored mechanism can help explain how forms of oxidative stress, such as exposure to cigarette smoke, damage cells in the lungs.

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Toxins in cigarette smoke, they show, open unpaired hemichannels-small portholes in the cell surface-that can, with very little provocation, turn into major breaches in the cell’s integrity, leading to rapid cell death.

This discovery by researchers from the University of Chicago, the University of California at San Diego and the University of California at Los Angeles, suggests new ways to prevent smoking-related cellular damage and possibly to put the brakes on other diseases tied to oxidative stress, including atherosclerosis, neurodegenerative diseases and even senescence.

“Opening hemichannels allows stressful, often toxic, stimuli to flow directly into cells, overwhelming the delicate and carefully maintained balance within and triggering the signals that induce cell death,” said study author Ratneshwar Lal, PhD, professor of medicine at the University of Chicago.

“We were surprised to find out how little it took to cause such damage, only a small change in membrane electrical properties,” he added, “and by how much damage it could cause,” he added.

Hemichannels form a small-gated pathway from the interior of a cell, through the cell membrane to the cell surface.

They usually connect with an identical hemichannel from an adjoining cell to form a gap junction. By directly connecting two cells, gap junctions enable them to exchange the chemical signals they use to coordinate their activities and maintain metabolic and ionic homeostasis among connected cells in a tissue.

About fifteen years ago, scientists realized that some hemichannels had no partners; they led directly from the cell’s interior to the fluid extracellular space. In 2000, Lal and colleagues showed that cells used these channels to increase their volume, opening as necessary to take in water and calcium ions that allowed cells to reorganise their cytoskeleton and mechanical properties commonly related to cell growth and differentiation.

In this study, they looked at the effects of oxidative stress on unpaired (or non-junctional) hemichannels found in the membrane of cells from the lungs and the heart–the primary targets of cigarette smoke.

When they exposed these cells to low levels of an extract made from cigarette smoke, the non-junctional hemichannels opened. This allowed toxic molecules found in the smoke to flow directly into the cell, and vital metabolites such as ATP and NAD, to leak out, leading, ultimately, to cell injury and death.

Drugs that prevented hemichannels from opening protected the cells from similar exposures. Treating the cells with silencing RNA for the hemichannel protein also protected cells by preventing the creation of these channels.

“It required very little stress to open these channels,. Substances found in smoke and other pollutants can alter the electrical potential of the cell’s membrane. A small shift in the membrane’s electrical potential, which we know occurs in many oxidative stress situations, appears to open these channels and allow unregulated flow. This can weaken and kill cells,” Lal said.

Cells have multiple membrane channels that carefully control the flow of specific small molecules in and out of the cell, including calcium, sodium and potassium ions, each of which passes through a specific type of channel.

Hemichannels, however, with ports nearly twice the size of an ion channel, are not as specific, permitting more rapid, less regulated flow of molecules up to the size of 1000 Daltons–wide enough to allow exchange of many signalling and messenger molecules, such as ATP and small metabolites that are essential for normal cell sustenance.

“We suspect that this mechanism could play a major role in the onset of diseases such as emphysema, which is associated with smoking,” said Lal.”

“Improperly opened hemichannels may play a role in many other diseases tied to environmental stimuli,” Lal said, “or even to normal aging, where oxidative stress is thought to contribute to the gradual accumulation of multiple small damaging hits. Finding and testing drugs or other mechanisms that can selectively block these unpaired channels offers a novel approach to disease prevention,” he added.

Source: The Times Of India

Categories
Yoga

Pashchimottanasana(full) (Yoga Exercise)

The front side of the body is called east side, while the back side is called the west side. In this Asana complete back side, i.e., the west side, right from the heels to the forehead, gets stretched and therefore, it is called ‘Pashchimottanasana’.

CLICK & SEE THE PICTURES


!st. Position:
Sitting Position.
How to do the exercise: Only inhale.
Exhale, and hold the big toes of both the feet with both the hands.
In exhaled state bend downward and rest the forehead on the knees. Continue smooth breathing. (as shown in the pictures)

Position: After bending down, keep the heels, calves, thighs completely touching to the floor, keeping the spine straight, rest the forehead on the knees and continue smooth breathing. Try to rest the elbows on the floor.
Since here the abdomen gets completely folded, it becomes necessary to bend only after complete exhalation.
One should bend downward as much as one’s body permits and then try to stabilize at that point, keeping the breathing smooth. Do not try to raise the knees in order to get the forehead on to the knees.
After taking the position, relax the whole body and automatically the head, shoulder, chest will come down owing to their weight and relaxation.

Releasing: Exhale, and inhaling, start raising the head.
Restore the hands to their place and take up the sitting position.

Duration: One finds it difficult to take up this Asana initially. But with practice and patience it can be maintained for thirty seconds. Later one certainly succeeds in having the final position and the duration is also increased to three minutes.
Benefits: This exercise, if done properly and regularly , will give various benefefits. As the whole of the west side gets stretched, they get purified and their functioning is greatly improved. At the same time, the muscles of the front side get contracted and there is pressure on the lungs, intestines and other internal juice producing glands. As a result of this their functioning is also improved.
It is very useful in setting right the troubles concerning the lumber part of the spinal cord and the digestive system.
Further, there is very sensitive part in our body known as Kundalini lying in dormant stage. This Asana is supposed to activate it.

Precaution : It has been said that this Asana is useful for the troubles of the spine. Yet ,people suffering from such troubles should practice this Asana only after consulting some Yoga experts.

Reference Book:– Yoga Pravesh

Categories
Yoga

Vakrasana -2(Yoga Exercise)

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This Asana (Yoga Exercise) is designed to twist the spine to the right and left side in from its erect position. The spine is made up of highly elastic joints and can be moved to any direction.
Pre position: Sitting Position.

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How to do the Exercise:

1. Bend the left leg in the knee and place its heel near the thigh. Keep the sole of the left foot flat on the floor and the thigh and knee touching to the chest.
2. Place the left hand in front of the right hand in such a way that the fingers of both the palms face each other and the palms remain flat on the floor.
3. Now turn the neck and the trunk to the right, twisting the spine and look back above the shoulder. Continue smooth breathing.

Position:

1. In this Asana the spine is to be kept straight.
2. The lower end of the spine and both the hips be placed well on the floor and stabilize them.
3. Then with the support of the neck and shoulders twist the upper vertebrae to the right. At the same time, the standing knee be kept close to the chest.
4. Alongwith the neck, the sight should also be turned to the right side and stabilize it in that direction.

Releasing:

1. Turn the neck to the front.
2. Restore the hand to its place.
3. Straighten the left leg and take the sitting position.

Note: Following the above mentioned process, practice this Asana placing the right leg in folding position.
Duration: This Asana should be retained for minimum two minutes on each side. With more practice this duration can be increased to six minutes.

Benefits: The elasticity of the spine increases as it gets twisted in its erect position. Along with the spine the belly and other internal organs also get twisted and receive the desired strain. It also has very good effect on the spinal cord and its functioning is improved.It improves digestive system too.

Precaution : One should avoid the temptation of attaining the ideal position if strain is unbearable.

Reference Book:- Yoga Pravesh

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