Brain: Intermediolateral nucleus
Medulla spinalis (Intermediolateral nucleus visible at right in green.)
nucleus intermediolateralis medullae spinalis
intermediolateral nucleus (IML) is a region of gray matter found in Rexed lamina VII of the spinal column, which forms the lateral horn.
The intermediolateral cell column exists at vertebral levels T1 - L2 and mediates the entire sympathetic innervation of the body, but the nucleus resides in the gray matter of the
Rexed Lamina VII contains several well defined nuclei including the
nucleus dorsalis (Clarke's column), the intermediolateral cell column (lateral gray horn), and the sacral autonomic nucleus.
It extends from the first thoracic through the second lumbar segment, and contains the autonomic motor neurons that give rise to the
preganglionic fibers of the sympathetic system (preganglionic sympathetic general visceral efferents).
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