Histology of the Nervous System

Figure III-2-1. Neuron Structure

Figure III-2-2. Neural Tissue with Nissl stain that stains rough ER in cell body (arrowhead) and proximal parts of dendrites (B) The axon (A) lacks Nissl substance. The nucleus of an adjacent neuron has a prominent nucleolus (arrow). Copyright McGraw-Hill Companies. Used with permission.

Cytoskeleton


The cytoskeleton of the neuron consists of microfilaments, neurofilaments, and microtubules.


Neurofilaments provide structural support for the neuron and are most numerous in the axon and the proximal parts of dendrites.


Microfilaments form a matrix near the periphery of the neuron. A microfilament matrix is prominent in growth cones of neuronal processes and functions to aid in the motility of growth cones during development. A microfilament matrix is prominent in dendrites and forms structural specializations at synaptic membranes. Microtubules are found in all parts of the neuron, and are the cytoplasmic organelles used in axonal transport.


Figure III-2-3. EM of Neuropil including the Cell Body of a Neuron with Rough ER (arrowheads) and Golgi (arrows) Surrounding neuropil has myelinated axons(M) and unmyelinated bare axons (box). Copyright McGraw-Hill Companies. Used with permission.
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Jun 16, 2017 | Posted by in GENERAL SURGERY | Comments Off on Histology of the Nervous System

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