Page 351 - Atlas of Histology with Functional Correlations

spinal cord was prepared with silver stain to show the neurons and axons of the

CNS. The large multipolar motor neurons (1) exhibit numerous dendrites (4).
Each motor neuron (1) contains a nucleus (5) and a nucleolus (6). Within the
cytoplasm of the motor neurons (1) is the cytoskeleton consisting of numerous
neurofibrils (3) that course through the cell body and extend into the dendrites
(4) and axons (8). Visible also are numerous axons of a size different from other

nerve cells in the spinal cord. Surrounding the motor neurons (1) are nuclei of
neuroglial cells (2), a blood vessel (7) with blood cells and a meshwork of
neural processes, the neuropil (9).

Similar to Figure 9.8, the clear spaces around the neurons and their processes

are artifacts caused by tissue shrinkage during the preparation of the spinal cord.

FIGURE 9.10 ■ Anterior gray horn of the spinal cord: multipolar neurons,
axons, and neuroglial cells. Stain: silver impregnation (Cajal method). ×80.

FIGURE 9.11 | Cerebral Cortex: Gray Matter

Cell types that constitute the gray matter of the cerebral cortex are distributed in

six layers, with one or more cell types predominant in each layer. Although there
are variations in the arrangement of cells in the cerebral cortex, distinct layers
are recognized in most regions. Horizontal and radial axons associated with
neuronal cells in different layers give the cerebral cortex a laminated appearance.
These layers are labeled with Roman numerals on the right side of the figure.

The most superficial is the molecular layer (I). Overlying the molecular cell
layer (I) is the delicate connective tissue of the brain, the pia mater (1). The
peripheral portion of molecular layer (I) is composed predominantly of

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