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Tegmentum Mesencephali

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Definition: The portion of midbrain situated under the dorsal TECTUM MESENCEPHALI. The two ventrolateral cylindrical masses or peduncles are large nerve fiber bundles providing a tract of passage between the forebrain with the hindbrain. Ventral midbrain also contains three colorful structures: the grey matter (PERIAQUEDUCTAL GRAY), the black substance (SUBSTANTIA NIGRA), and the RED NUCLEUS.  do not confuse with TECTUM MESENCEPHALI   
Examples Cerebral Aqueduct; Pedunculopontine Tegmental Nucleus; Periaqueductal Gray; Red Nucleus; Substantia Nigra; Ventral Tegmental Area 		Other names Cerebral Peduncle; Tegmentum Mesencephalus; Peduncles, Cerebral; Peduncle, Cerebral; Mesencephalus, Tegmentum; Mesencephali, Tegmentum; Cerebral Peduncles

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Sources: NLM Medical Subject Headings, NIH UMLS, Drugs@FDA, FDA AERS original data copyright United States Government. No endorsement implied. Last modified 6/6/2012
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