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Flashcards in Spinal Exam 3 Wk 3 Deck (20):

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

Opthalmic division of trigeminal


What are two unique features of the fourth cranial nerve?

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.


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

The right side muscle


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

Mesencephalic nucleus of the trigeminal nerve.


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

Great sensory nerve of the face


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

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


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

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


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

Semilunar ganglion, trigeminal ganglion, gasserian ganglion.


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

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


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

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


What are the names of the muscles of mastication?

Temporalis, masseter, medial pterygoid, lateral pterygoid.


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

Mandibular division of trigeminal


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

The pons


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?

Msencephalic nucleus of the trigeminal nerve


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

Trigeminal motor nucleus or spinal trigeminal nucleus


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

Mixed cranial nerve


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

Somatic efferent pathway


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

Lateral rectus extrinsic muscle of the eye


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

Spinal trigeminal nucleus


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

Abducent or abducens motor nucleus or spinal trigeminal nucleus