Sympathetic nervous system - Information Transmission

The sympathetic nervous system (SNS) is one half of the autonomic nervous system; the parasympathetic nervous system (PNS) is the other. Sympathetic nervous system - Function. The sympathetic nervous system activates what is often termed the "fight or flight response". This response is also known as sympathico-adrenal response of the body, as the pre-ganglionic sympathetic fibers that end in the adrenal medulla (but also all other sympathetic fibers) secrete acetylcholine, which activates t ...

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Messages travel through the SNS in a bidirectional flow. Efferent messages can trigger changes in different parts of the body simultaneously. For example, the sympathetic nervous system can accelerate heart rate, widen bronchial passages, decrease motility (movement) of the large intestine, constrict blood vessels, cause pupil dilation, piloerection (goose bumps) and perspiration (sweating), and raise blood pr ...

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Sympathetic nervous system, Sympathetic nervous system - Function, Sympathetic nervous system - Organization, Sympathetic nervous system - Information Transmission

Read more here: » Sympathetic nervous system: Encyclopedia II - Sympathetic nervous system - Information Transmission

The sympathetic nervous system activates what is often termed the "fight or flight response". This response is also known as sympathico-adrenal response of the body, as the pre-ganglionic sympathetic fibers that end in the adrenal medulla (but also all other sympathetic fibers) secrete acetylcholine, which activates the secretion of epinephrine and to a lesser extent norepinephrine from it. Therefore this response that acts primarily on the cardiovascular system is mediated directly via impulses transmitted through the sympathetic nervous system and indirectl ...

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Sympathetic nervous system, Sympathetic nervous system - Function, Sympathetic nervous system - Organization, Sympathetic nervous system - Information Transmission

Read more here: » Sympathetic nervous system: Encyclopedia II - Sympathetic nervous system - Function

The sympathetic nerves emerge near the spinal cord, inside the vertebral column, travelling along the path of the nerve roots. After a few twists and turns, sympathetic nerves branch off and travel into major organs, glands, and other groupings of nerves (sometimes called ganglia). [1] Cells of the SNS originate toward the middle of the spinal column, intermediolateral cell column, starting with the thoracic vertebrae numbers 1 through 12 (T1-T12) and endin ...

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Sympathetic nervous system, Sympathetic nervous system - Function, Sympathetic nervous system - Organization, Sympathetic nervous system - Information Transmission

Read more here: » Sympathetic nervous system: Encyclopedia II - Sympathetic nervous system - Organization