What is the bulge on the posterior root of a spinal nerve called?

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Prepare for the West-MEC RMA-AMT Module 1 Exam. Use flashcards and multiple-choice questions with hints and detailed explanations to enhance your study experience. Gain confidence and be ready for your exam!

Multiple Choice

What is the bulge on the posterior root of a spinal nerve called?

Explanation:
The bulge on the posterior root is a ganglion, specifically the dorsal root ganglion. A ganglion is a cluster of nerve cell bodies located outside the central nervous system. In this case, it contains the cell bodies of sensory (pseudounipolar) neurons whose peripheral processes reach sensory receptors and whose central processes enter the spinal cord. This isn’t a synapse, which is a connection between neurons, typically where signals are transmitted. It isn’t a nucleus, which would be a cluster of neuron cell bodies inside the CNS. And it isn’t a single neuron, since the bulge represents many neuron cell bodies grouped together in the dorsal root.

The bulge on the posterior root is a ganglion, specifically the dorsal root ganglion. A ganglion is a cluster of nerve cell bodies located outside the central nervous system. In this case, it contains the cell bodies of sensory (pseudounipolar) neurons whose peripheral processes reach sensory receptors and whose central processes enter the spinal cord.

This isn’t a synapse, which is a connection between neurons, typically where signals are transmitted. It isn’t a nucleus, which would be a cluster of neuron cell bodies inside the CNS. And it isn’t a single neuron, since the bulge represents many neuron cell bodies grouped together in the dorsal root.

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