Each motor nucleus is characterized by the neuropil at the cellular level. This

Question

Each motor nucleus is characterized by the neuropil at the cellular level. This term denotes

a.) compacted cellular processes that surround neurons and glial cells

b.) an amorphous ground substance surrounding neurons and glial cells

2.) Consider the dendritic field, body, and proximal axon of any given -motor neuron. These neuronal components would be found within the CNS. In contrast, the distal axon would either be found within a cranial or spinal nerve, depending upon the location of the neuron. This means that the global population of -motor neurons – in body space – would either be found in association with brainstem motor nuclei and their corresponding cranial nerves – or -- within the spinal cord and spinal nerves. Where are the vast majority of -motor neurons located by number?

a.) brainstem

b.) spinal cord

Explanation / Answer

1. a.) compacted cellular processes that surround neurons and glial cells. Nueropil is a densely compacted fibrous material surrounding the neurons and glial cells in the CNS.

2. b). spinal cord (-motor neurons are located more in spinal cord than in the brain stem )

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