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Unformatted text preview: entral Nervous System
The spinal cord is composed of grey and white matter (Spinal Cord 1). The grey matter is composed of
nerve cell bodies and in a cross-sectional cut appears as a darker stained "H"-like central area. The white
matter, composed entirely of axonal projections, surrounds the grey matter and is lighter staining (Spinal
Cord 2). Brain
Like the spinal cord, the brain is composed of areas of grey and white matter. In some areas an addition
outer gray layer is present. We will study two regions of the brain, in which this additional grey matter has a
Starting at the surface of the cortex and moving inward, you can identify the first three layers of cell bodies
(Cerebral Cortex 1 ): (1) superficial molecular layer, containing only a few small cell bodies; (2) outer
granular layer, containing small round cell bodies; (3) pyramidal cell layer, containing cell bodies
triangular in shape (Cerebral Cort...
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- Spring '12