Vasomotor: From 1 Different Sources
adj. controlling the muscular walls of blood vessels, especially arteries, and therefore their diameter.
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 (see NEURON(E)) in the MEDULLA OBLONGATA of the BRAIN; they receive messages from sensory receptors in the circulatory system, and engineer re?ex alterations in the heart rate and blood-vessel diameters in order to adjust the blood pressure. The centre also receives transmission from other parts of the brain enabling emotions – fear or anger – to in?uence blood pressure. The vasomotor centre operates through the vasomotor nerves of the SYMPATHETIC NERVOUS SYSTEM and the PARASYMPATHETIC NERVOUS SYSTEM.... vasomotor centre
Like the previous, but less dangerous and more frequently caused by purely neurologic stimulus. The pain is more spasmodic and there is usually little actual blood vessel blockage.... angina, vasomotoria
Small nerve ?bres that lie upon the walls of blood vessels and connect the muscle ?bres of their middle coat with the NERVOUS SYSTEM. Through these nerves the blood vessels are retained in a state of moderate contraction. There are vasodilator nerves, through which are transmitted impulses that dilate the vessels, and, in the case of the skin vessels, produce the condition of blushing; there are also vasoconstrictor nerves which transmit impulses that constrict, or narrow, the blood vessels – as occurs on exposure to cold (see HYPOTHERMIA). Various drugs produce dilatation or contraction of the blood vessels, and several of the substances produced by ENDOCRINE GLANDS in the body have these effects: for example, ADRENALINE.... vasomotor nerves
any nerve, usually belonging to the autonomic nervous system, that controls the circulation of blood through blood vessels by its action on the muscle fibres within their walls or its action on the heartbeat. The *vagus nerve slows the heart and reduces its output, but sympathetic nerves increase the rate and output of the heart and increase blood pressure by causing the constriction of small blood vessels at the same time.... vasomotor nerve
subjective sensations experienced by women around the time of the *menopause, often described as explosions of heat (hot flushes), mostly followed by profuse sweating and sometimes preceded by an undetermined sensation with waking at night. Objective signs are sudden reddening of the skin on the head, neck, and chest and profuse sweating. Physiological changes include peripheral vasodilatation, *tachycardia with normal blood pressure, and raised skin temperature with normal body temperature.... vasomotor symptoms
Health Encyclopedia