lower motor neuron
Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger,
Peer Review Status: Externally Peer Reviewed
Rhesus monkey, 10% formalin, Glees' method, 612 x.
This plate shows a large multipolar motor neuron in the anterior horn of the spinal cord. Note the characteristic large, rounded central nucleus, the prominent nucleolus, and processes that extend from the cell body (perikaryon). Note also the stout dendrite. A collection of lipochrome pigment (lipofuscin) is seen in one corner of the cytoplasm. Lipochrome pigment is believed to be a product of normal metabolic activity and accumulates with age. It can also be seen in cardiac muscle (Plate 80).
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