Dual brain stem projection from the cortical masticatory area in guinea-pig

The cortical masticatory area (CMA) in the guinea pig is subdivided into the anterior and posterior parts (A-CMA and P-CMA), based on the pattern of the CMA-induced rhythmical digastric EMG burst and the cytoarchitecture. The anterograde tracing of horseradish peroxidase from the A-CMA and P-CMA rev...

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Bibliographic Details
Published in:	Neuroreport Vol. 6; no. 11; p. 1573
Main Authors:	Enomoto, S, Kohase, H, Nakamura, Y
Format:	Journal Article
Language:	English
Published:	England 31-07-1995
Subjects:	Animals Brain Stem - physiology Cerebral Cortex - physiology Electromyography Guinea Pigs Neural Pathways - physiology Stomatognathic System - innervation Wheat Germ Agglutinin-Horseradish Peroxidase Conjugate
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Summary:	The cortical masticatory area (CMA) in the guinea pig is subdivided into the anterior and posterior parts (A-CMA and P-CMA), based on the pattern of the CMA-induced rhythmical digastric EMG burst and the cytoarchitecture. The anterograde tracing of horseradish peroxidase from the A-CMA and P-CMA revealed, in addition to a common projection to the region around the trigeminal motor nucleus and the parvicellular reticular formation bilaterally, a massive projection to the ipsilateral superior colliculus (SC) from the A-CMA but not from the P-CMA. The results suggest a dual brain stem projection system from the CMA: the direct pyramidal route from the P-CMA and the SC-mediated indirect route from the A-CMA.
ISSN:	0959-4965
DOI:	10.1097/00001756-199507310-00027