Category: V

Vault of the skull part of the skull which includes the frontal bone, the temporal bones and the occipital bone.  

Three of the four parts of the quadriceps femoris, the muscle of the thigh.  

Inflammation of the vas deferens and seminal vesicles, usually occurring with prostatitis and causing pain in the scrotum and groin and fever. Treatment is by antibiotics. Inflammation of the seminal vesicles and vas deferens. This usually occurs in association with prostatitis and causes pain in the perineum, groin, and scrotum and a high temperature. On…

A surgical operation to reverse a vasectomy. Surgical procedure that attempts to restore the function of the vas deferens on either or both sides after the vas has been severed in a vasectomy. In many cases the function of the vas deferens is restored but fertility does not result, usually because antibodies that interfere with…

A fainting fit as a result of a slowing down of the heartbeats caused by excessive activity of the vagus nerve. A temporary reaction marked by pale skin, nausea, sweating, slow heartbeat, and dropping blood pressure; often accompanied by a loss of consciousness. Vasovagal attack is also known as simple fainting. Cowers syndrome, and vasodepressor…

A nerve in the wall of a blood vessel which affects the diameter of the vessel. Any nerve, usually belonging to the autonomic nervous system, that controls the circulation of blood through blood vessels by its action on the muscle fibers within their walls or its action on the heart beat. The vagus nerve slows…

A nerve centre in the brain which changes the rate of heartbeat and the diameter of blood vessels and so regulates blood pressure. The description ‘vasomotor’ refers to control of the muscular walls of blood vessels, particularly arteries, dilating or constricting their diameters. The vasomotor centre is a group of neurons in the medulla oblongata…

The control of the diameter of blood vessels and thus of blood flow. An increase or decrease in the diameter of blood vessels, particularly the arteries. Change in caliber of a blood vessel. The enlargement or reduction in the diameter of a blood vessel.  

A surgical operation to reverse a vasectomy in which the cut end of the vas deferens is joined to a tubule within the epididymis above a blockage in it.  

The relaxation of blood vessels, especially the arteries, making them wider and leading to increased blood flow or reduced blood pressure. An increase in the diameter of blood vessels, especially arteries. This results from activation of the vasomotor center in the brain, which brings about relaxation of the arterial walls and a consequent lowering of…