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Anatomy Atlases: Atlas of Microscopic Anatomy: Section 1 - Cells Atlas of Microscopic Anatomy: Section 6 - Nervous Tissue

Plate 6.85 Cerebral Cortex: Motor area, Precentral region

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger, Jr., Ph.D.
Peer Review Status: Externally Peer Reviewed

Motor area, Precentral region

Plate 6.85 Cerebral Cortex: Motor area, Precentral region

Rhesus monkey, 10% formalin, Bodian silver, 162 x.

Pyramidal cells: Characteristic of cerebral cortex. The apex of the cell directed toward the surface of the cortex is termed the apical dendrite. Horizontally oriented basal dendrites also arise from the cell body. Note the variation in size of pyramidal cells (10 to 100 µm). The pyramidal cells located in the motor cortex are the largest of their kind and are known as Betz* cells. The region between pyramidal and glial cells is termed the neuropil and is filled with glial and nerve cell processes

* Betz was a nineteenth-century Russian anatomist.

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