CN4

Question 0

The right fourth cranial nerve will innervate which side target muscle?

Answer 0

The right side muscle.

Question 1

What are the two unique features of the fourth cranial nerve?

Answer 1

It is the only cranial nerve with an apparent origin from the dorsal surface of the brain, it is the only cranial efferent nerve to decussate within the midline from its nucleus.

Question 2

The fourth cranial nerve exits the cranial vault by way of which opening?

Answer 2

Superior orbital fissure, sphenoid bone.

Question 3

Somatic efferent fibers from the fourth cranial nerve will innervated which muscles?

Answer 3

Superior oblique extrinsic eye muscle.

Question 4

Peripheral sensory processes conveyed in the fourth cranial nerve will communicate with which cranial nerve branch?

Answer 4

Ophthalmic division of trigeminal.

Question 5

Central sensory processes from the Gasserian ganglion, semilunar ganglion, or trigeminal ganglion are conveyed to the pons in what structure?

Answer 5

The sensory root of the trigeminal nerve.

Question 6

Typically, primary afferent neurons of the fourth cranial nerve located in the semilunar ganglion, Gasserian ganglion, or trigeminal ganglion will synapse in what nucleus?

Answer 6

Spinal trigeminal nucleus.

Question 7

Which of the cranial nuclei of termination contain primary afferent neurons?

Answer 7

Mesencephalic nucleus of the trigeminal nerve.