MH 001 Nuclear Morphology

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Motor Neurons

The is a cross-section from half of a spinal cord.

- large cell bodies in the ventral horn that can be more than 100 µm in diameter.
- - large with mostly euchromatin and a prominent nucleolus.
- - basophilic material in nerve cell bodies and dendrites. The result of a large amount of RNA in rough endoplasmic reticulum (RER) and free polyribosomes.
- - a single, large process that emerges from the nerve cell bodies at the axon hillock. Axons do not contain Nissl substance.
- - multiple processes extending from the nerve cell bodies that contain Nissl substance.
Glial Cells - the small nuclei found around the motor neurons are mostly glial cells.