Vasodilation and Constriction

It appears that humans (and animals) can regulate vasodilatation and vasoconstriction. Robert Freeman and his colleagues have carefully worked out the mechanisms in finger blood regulation using biofeedback training procedures. First, they demonstrated that volunteers could warm or cool their hands upon command. Then they used a series of pharmacological blockades to show that the ability to cool one's fingers is mediated by the sympathetic nerve, but warming above baseline temperature is blocked by a b-andre-nergic blocker in the blood supply. Thus, autonomic voluntary control was demonstrated. Finger warming is a commonly used biofeedback modality.

One particular application of finger warming has a solid scientific basis: Reynauds phenomenon is a multifaceted disorder that produces symptoms of vasospasm in the extremities. Hand warming against a cold challenge appears to be a viable treatment for this serious and sometimes severe problem.

Understanding And Treating Autism

Understanding And Treating Autism

Whenever a doctor informs the parents that their child is suffering with Autism, the first & foremost question that is thrown over him is - How did it happen? How did my child get this disease? Well, there is no definite answer to what are the exact causes of Autism.

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