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عمومی::
مادهی خاکستری
The spinal cord, as seen in cross section (Fig. 14), contains central grey matter and peripheral white matter.
The grey matter contains many neuronal cell bodies and synapses.
The corticospinal pathway synapses in the anterior horn (motor grey matter) of the spinal cord just prior to leaving the cord.
The lesion involves both the anterior horns (motor) of the grey matter (causing a lower motor neuron lesion) as well as the corticospinal tracts (resulting in an upper motor neuron lesion).
Visceral (autonomic) motor nuclei are located in between the somatic sensory and motor areas of the spinal cord grey matter.
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