Vasomotor, Vasomotor (Vasomotor)

Vasomotor is a control system that controls the contraction and relaxation of the muscular lining of the walls of blood vessels, especially arteries. This system plays an important role in regulating blood pressure and distributing blood flow throughout the body.

The main elements of the vasomotor system are nerve fibers that are part of the sympathetic nervous system. These fibers are located along the walls of blood vessels and have the ability to control the tone of the muscle membrane.

When sympathetic nerves are activated, they cause the muscle lining of the blood vessel walls to contract, resulting in narrowing of the blood vessels and an increase in blood pressure. This process is called vasoconstriction.

On the other hand, when the sympathetic nerves are inactive, the muscle tissue relaxes, the lumen of the blood vessels dilates and blood pressure decreases. This process is called vasodilation.

Vasomotor control can also be regulated by hormones such as epinephrine and norepinephrine, which are released by the adrenal glands when there is stress or danger. These hormones increase the activity of the sympathetic nervous system, causing vasoconstriction and increasing blood pressure.

Overall, vasomotor control is an important mechanism that allows the body to regulate blood pressure and blood flow distribution based on current needs. Disturbances in this mechanism can lead to various diseases, such as hypertension or hypotension, so understanding and studying it are important tasks for medicine.

Vasomotor reflexes play an important role in regulating blood pressure, body temperature, metabolism and other body functions. They control the process of contraction and relaxation of the muscular lining of the walls of blood vessels, especially arteries. These reflexes are regulated by the autonomic nervous system, which consists of two divisions: sympathetic and parasympathetic. The sympathetic division activates vasomotor responses such as constriction of blood vessels and increased heart rate. The parasympathetic department, on the contrary, causes the blood vessels to dilate and the heart rate to slow down.

Vasomotor reflexes also play a role in thermoregulation. The contraction and expansion of blood vessels in the skin, subcutaneous tissue, muscles and internal organs helps regulate body temperature. For example, when the ambient temperature rises, blood vessels dilate, increasing blood flow to the skin and cooling it. This process is called cutaneous vasodilation (or cutaneous vasodilation).

In addition, vasomotor reflexes are involved in other body functions, such as the regulation of metabolism, hormonal balance and immune response. For example, dilation of blood vessels during stress or physical activity helps increase blood flow to the muscles and improve their function.

However, impaired vasomotor reflexes can lead to various diseases. For example, disturbances in the sympathetic system can lead to hypertension and other cardiovascular diseases. Disturbances in the parasympathetic system, on the contrary, can lead to hypotension and other circulatory disorders.

In general, understanding the mechanisms of vasomotor regulation and its disorders is important for understanding and treating various diseases.