Cranial Nerves Flashcards
what is the primary function of the olfactory nerve (I)?
Smell (special sensory)
what is the origin of the olfactory nerve (I)?
receptors of olfactory epithelium
what is the pathway of the olfactory nerve (I)?
olfactory foramina in cribiform plate
what is the destination of the olfactory nerve (I)?
olfactory bulbs
what is the primary function of the optic nerve (II)?
vision (special sensory)
What is the origin of the optic nerve (II)?
retina of the eye
what is the pathway of the optic nerve (II)?
optic canals of the sphenoid
what is the destination of the optic nerve (II)?
diencephalon via optic chiasm
what is the optic chiasm?
where sensory fibers converge and cross opposite of the brain
what is the optic tract?
it reorganizes axons leading to lateral and geniculate nuclei
what is the primary function of the oculomotor nerve (III)?
eye movements (motor)
what is the origin of the oculomotor nerve (III)?
mesencephalon
what is the pathway for the oculomotor nerve (III)?
superior orbital fissures of sphenoid
what is the destination of the oculomotor nerve (III)?
somatic motor- (superior, inferior, and medial rectus muscles. inferior oblique muscles. levator palpebrae superioris muscle (eye brow)
visceral motor- intrinsic eye muscles
what is the oculomotor nerve (III)?
controls 4/6 eye movements and delivers autonomic fibers to cillary ganglion
what is the primary function of the trochlear nerve (IV)?
eye movements (motor)
what is the origin of the trochlear nerve (IV)?
mesencephalon
what is the pathway of the trochlear nerve (IV)?
superior orbital fissure of sphenoid
what is the destination of the trochlear nerve (IV)?
superior oblique muscle
what is the primary function of the Trigeminal nerve (V)?
mixed muscles (sensory and motor) to the face
what is the largest nerve in the body
trigeminal (V) with three major branches
what is the structure of the semilunar ganglion?
contains cell bodies of sensory neurons
What is the primary function of the facial nerves (VII)?
mixed (sensory and motor) to muscles of the face
what is the origin of the facial nerves (VII)?
taste receptors of anterior 2/3rd of the tongue
what is the primary function of the vestibulocochlear nerve (VIII)?
hearing (cochlear branch)
balance (vestibular branch)
what is the primary function of the glossopharyngeal nerve (IX)?
mixed (sensory and motor) to head and neck
what is the primary function of the vagus nerve (X)?
mixed (sensory and motor) widely distributed in thorax and abdomen
what is the primary function of the accessory nerve (XI)?
motor to muscles of neck and upper back
what is the primary function of the hypoglossal nerve (XII)?
tongue movements (motor)
what is the primary function of the abducens nerve (VI)?
eye movements (motor)
