Vascular nerves
Vascular nerves are nerves that innervate the blood vessels. They play a crucial role in the regulation of vascular tone and, consequently, blood flow. The vascular nerves are part of the autonomic nervous system, which is responsible for the involuntary control of the body's organs and systems.
Etymology[edit | edit source]
The term "vascular" comes from the Latin vasculum, meaning "small vessel", and "nerves" from the Greek νεῦρον (neûron), meaning "string, sinew".
Anatomy[edit | edit source]
Vascular nerves are part of the autonomic nervous system, which is divided into the sympathetic and parasympathetic nervous systems. The sympathetic nervous system primarily innervates the smooth muscle of the blood vessels, causing vasoconstriction, while the parasympathetic nervous system has a lesser role, causing vasodilation.
Function[edit | edit source]
The primary function of the vascular nerves is to regulate the tone of the blood vessels. This is achieved through the release of neurotransmitters from the nerve endings, which act on the smooth muscle cells of the blood vessel walls. The neurotransmitters released by the sympathetic nervous system cause vasoconstriction, which increases blood pressure and reduces blood flow. Conversely, the neurotransmitters released by the parasympathetic nervous system cause vasodilation, which decreases blood pressure and increases blood flow.
Clinical significance[edit | edit source]
Abnormalities in the function of the vascular nerves can lead to various cardiovascular diseases, such as hypertension, atherosclerosis, and heart failure. Therefore, understanding the function of the vascular nerves is crucial for the development of treatments for these diseases.
Related terms[edit | edit source]
- Vasoconstriction: The constriction of blood vessels, which increases blood pressure.
- Vasodilation: The dilation of blood vessels, which decreases blood pressure.
- Neurotransmitter: Chemicals that transmit signals from a neuron to a target cell across a synapse.
- Autonomic nervous system: The part of the nervous system responsible for control of the bodily functions not consciously directed, such as breathing, the heartbeat, and digestive processes.
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