Multiple choice

Deviation of tongue to the right side indicates __________.

  1. hypoglossal nerve injury of right side

  2. hypoglossal nerve injury of left side

  3. lingual nerve injury of left side

  4. lingual nerve injury of right side
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A Correct answer
Explanation

Hypoglossal nerve is a somatic motor nerve, supplying all extrinsic and intrinsic muscles of tongue. If there is hypoglossal nerve injury (due to penetrating injury to the neck and a skull base pathology), it causes the following:

  1. Atrophy of ipsilateral muscle of the tongue and deviation towards the affected side with speech disturbance.
  2. Deviation of tongue to right side as hypoglossal nerve on right side is injured.

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