Blood really does rush to the head during a fit of anger.
Medical research has proved that when irate, the carotid arteries – which supply the head and neck – dilate.
The increased flow of blood to the brain then results in what is known as a ‘head rush‘.
Scientists tested 58 healthy volunteers between the ages of 19 and 60 for their cerebral responses to mental stress.
It was found that in all cases the mental stress led to vasodilation – the relaxing of blood vessels carrying blood to the head – accompanied by an increase in brain blood flow.
However, those with high blood pressure did not register increased blood flow when annoyed.
Tasneem Naqvi and Hahn Huynh from the University of Southern California and Cedars-Sinai Medical Centre set the volunteers tasks designed to make them agitated.
The researchers then used ultrasound imaging to measure the effects on the carotid artery and an artery within the brain.
The results are published in the journal Cardiovascular Ultrasound.
Source:Mail Online: 3rd.July. ’09