Spinal Exam 3 Wk 3

Question 1

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

Answer 1

Opthalmic division of trigeminal

Question 2

What are two unique features of the fourth cranial nerve?

Answer 2

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 midbrain from its nucleus.

Question 3

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

Answer 3

The right side muscle

Question 4

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

Answer 4

Mesencephalic nucleus of the trigeminal nerve.

Question 5

The fifth cranial nerve is functionally referred to as the ______?

Answer 5

Great sensory nerve of the face

Question 6

What is the exit site from the cranial vault for each division of the fifth cranial nerve?

Answer 6

Ophthalmic nerve-superior orbital fissure,
Maxillary nerve-foramen rotundum,
Mandibular division-foramen ovale

Question 7

What location will each branch of the fifth cranial nerve pass into upon exit from the cranial vault?

Answer 7

Ophthalmic nerve - orbit;
Maxillary nerve - pterygopalatine region;
Mandibular nerve - infratemporal region.

Question 8

Peripheral sensory processes of the fifth cranial nerve are primarily derived from pseudounipolar afferent neuron cell bodies located in which ganglion?

Answer 8

Semilunar ganglion, trigeminal ganglion, gasserian ganglion.

Question 9

Central sensory processes carried in the fifth cranial nerve synapses with secondary sensory neuron cell bodies in what location?

Answer 9

Mainly in the principal sensory nucleus; some in the spinal trigeminal nucleus.

Question 10

What muscles are innervated by branchial efferent fibers conveyed in the fifth cranial nerve?

Answer 10

Temporalis, masseter, medial pterygoid, mylohyoid, anterior belly of the digastric, tensor tympani and tensor veli palatini.

Question 11

What are the names of the muscles of mastication?

Answer 11

Temporalis, masseter, medial pterygoid, lateral pterygoid.

Question 12

Peripheral sensory processes from receptors located in the muscles of mastication are conveyed in which branch of the fifth cranial nerve?

Answer 12

Mandibular division of trigeminal

Question 13

The sensory root of the trigeminal nerve will have an apparent origin from which part of the encephalon?

Answer 13

The pons

Question 14

The fifth cranial nerve carries peripheral sensory processes from endings located in the muscles of mastication and the extraocular muscles to psuedounipolar cells in which nucleus?

Answer 14

Msencephalic nucleus of the trigeminal nerve

Question 15

Afferent neurons within the mesencephalic nucleus that are associated with sensation from the muscles of mastication will synapse at what locations?

Answer 15

Trigeminal motor nucleus or spinal trigeminal nucleus

Question 16

What is the classification of the mandibular division of the cranial nerve V based on function?

Answer 16

Mixed cranial nerve

Question 17

At its apparent origin cranial nerve VI conveys which classification of neural pathway?

Answer 17

Somatic efferent pathway

Question 18

The sixth cranial nerve will innervate what target organ(s)?

Answer 18

Lateral rectus extrinsic muscle of the eye

Question 19

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

Answer 19

Spinal trigeminal nucleus

Question 20

In the somatic afferent pathway of cranial nerve VI, neurons within the mesencephalic nucleus may synapse at what locations?

Answer 20

Abducent or abducens motor nucleus or spinal trigeminal nucleus