Week 10 Flashcards
Postganglionic parasympathetic efferent fibers of the third cranial nerve synapses in what targets?
sphincter pupillae and ciliaris intrinsic eye muscles
Axons carried in the second cranial nerve will synapse in what specific location?
Lateral geniculate nucleus.
What are the 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 midline from its nucleus.
The right fourth cranial nerve will innervate which side target muscle.
the right side muscle
Somatic efferent fibers from the fourth cranial nerve will innervate which muscles?
superior oblique extrinsic muscle of the eye
The fifth cranial nerve is functionally referred to as the?
Great sensory nerve of the face
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 synapse with the secondary sensory neuron cell bodies in what location?
mainly in the principal sensory nucleus; some in the spinal trigeminal nucleus
What muscle are innervated by branchial efferent fibers conveyed in the fifth cranial nerve?
temporalis, masseter, medial pterygoid, lateral 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.
The fifth cranial nerve carries peripheral sensory processes from endings located in the muscles of mastication and the extraocular muscles to pseudounipolar cells located in which nucleus?
mesencephalic nucleus of the trigeminal nerve
The sixth cranial nerve will innervate what target organs?
lateral rectus extrinsic muscle of the eye
Peripheral sensory processes conveyed in the sixth cranial nerve will communicate with which cranial nerve branch?
ophthalmic division of trigeminal
Because of its function, the seventh cranial nerve is often called the?
great motor nerve of the face
What classifications of fibers are conveyed at the apparent origin of the seventh cranial nerve?
branchial efferent, visceral efferent, somatic afferent, special visceral afferent.
What is the name of the afferent ganglion for the seventh cranial nerve?
geniculate ganglion, genicular ganglion
Most of the seventh cranial nerve will exit the skull via what opening
the stylomastoid foramen
Branchial efferent fibers carried in the seventh cranial nerve will innnervate what muscles?
muscles of facial expression, muscles of the scalp and auricle, the buccinator, platysma, stapedius, stylohyoid, and posterior belly of the digastric
Visceral efferent fibers conveyed in the seventh cranial nerve originate from what nucleus?
superior salivatory nucleus
Which immediate branch of the seventh cranial nerve will convey preganglionic parasympathetic efferent fibers to the lacrimal gland?
greater petrosal or greater superficial petrosal nerve
Which branch of the seventh cranial nerve will convey preganglionic parasympathetic fibers into the pterygopalatine ganglion.
Vidian nerve or nerve of the pterygoid canal
What are the names of the ganglion of synapse in the efferent pathway to the lacrimal gland?
pterygopalatine ganglion, sphenopalatine ganglion, Meckel’s ganglion
Postganglionic parasympathetic efferent fibers from the pterygopalatine, sphenopalatine or Meckel’s ganglion become incorporated in which cranial nerve branch?
maxillary nerve of the trigeminal
