Definition: 'Spinomesencephalic Fibers'
spinomesencephalic fibersType: Term
1. a composite group of fibers traveling in the anterolateral system (spinal lemniscus) and ending in the mesencephalon; includes spinotectal fibers [TA] to the deeper layers of the superior colliculus and spinoperiaqueductal fibers [TA] that terminate in the periaqueductal gray matter.
Synonyms: fibrae spinomesencephalicae
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