central gray substance

cen·tral gray sub·stance

1. in general, the predominantly small-celled gray matter adjoining or surrounding the central canal of the spinal cord and the third and fourth ventricles of the brainstem; 2. in particular, the thick sleeve of gray matter surrounding the cerebral sylvian aqueduct in the midbrain, rostrally continuous with the posterior nucleus of the hypothalamus; in sections stained for myelin it stands out from the adjoining tectum and tegmentum by the paucity of its myelinated fibers. Synonym(s): substantia grisea centralis [TA], periaqueductal gray substance

单词	central gray substance
释义	central gray substance cen·tral gray sub·stance 1. in general, the predominantly small-celled gray matter adjoining or surrounding the central canal of the spinal cord and the third and fourth ventricles of the brainstem; 2. in particular, the thick sleeve of gray matter surrounding the cerebral sylvian aqueduct in the midbrain, rostrally continuous with the posterior nucleus of the hypothalamus; in sections stained for myelin it stands out from the adjoining tectum and tegmentum by the paucity of its myelinated fibers. Synonym(s): substantia grisea centralis [TA], periaqueductal gray substance
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