The hypoglossal nerve is located:

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Question restatement: The hypoglossal nerve is located among the following possibilities:

Option 1: 'below the neck and chest' — This is incorrect. The hypoglossal nerve does not run in the neck and chest region; it is associated with the head and tongue musculature, not the thoracic or abdominal areas.

Option 2: 'below the tongue' — This is the correct characterization. The hypoglossal nerve travels inferior to the tongue and innervates the intrinsic and extrinsic muscles of the tongue, positioning it in relation to the tongue itself.

Option 3: 'in the neck muscles' — While the nerve passes through cervical regions early in its course, stating it is located in the neck muscles is imprecise and misleading. The key anatomical relationship is its course beneath the tongue to reach the tongue muscles, not that it resides within neck muscles.

Option 4: 'in the eye' — This is clearly incorrect. The hypoglossal nerve does not relate to ocular structures or the extraocular muscles; those are served by cranial nerves III, IV, and VI, not XII.

In summary, the statement that best aligns with the anatomical course and function of the hypoglossal nerve is that it is located below the tongue. The other options either misplace its general region, misconstrue its path, or confuse it with other cranial nerve distributions.

hk_264_120258_248438 Chapter 7 Self Test: Nervous System and Special Senses

The hypoglossal nerve is located:

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