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cranial nerve

Line breaks: cra|nial nerve

Definition of cranial nerve in English:

noun

Anatomy
Each of twelve pairs of nerves which arise directly from the brain, not from the spinal cord, and pass through separate apertures in the skull.
Example sentences
  • From the brain stem emerge pairs of cranial nerves, analogous to the spinal nerves that innervate the limbs and trunk.
  • Occasionally, tumors may develop in the brain, on cranial nerves, or on the spinal cord.
  • Cranial nerve palsies of the third, fourth and sixth cranial nerves may occur, affecting extraocular motility.

They are (with conventional Roman numbering) the olfactory (I), optic (II), oculomotor (III), trochlear (IV), trigeminal (V), abducens (VI), facial (VII), vestibulocochlear (VIII), glossopharyngeal (IX), vagus (X), accessory (XI), and hypoglossal (XII) nerves

Definition of cranial nerve in:

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