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The thoraco-lumbar outflow refers to the region of the sympathetic nervous system that originates from the thoracic and lumbar segments of the spinal cord, specifically from T1 to L2 or L3. It is responsible for the "fight or flight" response, activating physiological changes such as increased heart rate, dilation of bronchi, and redistribution of blood flow during stress. This outflow predominantly innervates structures in the thorax, abdomen, and pelvis.

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3w ago

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What outflow of the sympathetic division occurs from which regions of the CNS?

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Yes, sympathetic fibers leave the central nervous system at the thoracolumbar region, specifically from the intermediolateral cell column of the spinal cord. These fibers then form the sympathetic trunk and travel to the target organs to regulate the body's fight-or-flight response.


Is the sympathetic division described as thoracolumbar?

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