Cranial Nerves Flashcards
What is CN I? Motor, sensory, or mixed?
olfactory, sensory
Is The olfactory visceral or somatic sensory?
visceral
what structure does The olfactory nerve innervate?
olfactory tissue
What is CN II? Motor, sensory, or mixed?
optic, sensory
is CN II visceral or somatic sensory?
somatic
what structure does The optic nerveinnervate?
optic tissue
Where does The optic nerve decussate?
optic chiasma
What is CN III? Motor, sensory, or mixed?
occulomotor, motor
is the occulomotor visceral or somatic motor?
both
what skeletal muscles are innervated by the occulomotor
dorsal rectus, medial rectus, ventral rectus, inferior oblique
what smooth muscles are innervated by the occulomotor
intrinsic eye muscles
What is CN IV? Motor, sensory, or mixed?
trochlear, motor
is the trochlear visceral or somatic motor?
somatic
what does the trochlear innervate?
dorsal oblique
What is CN V? Motor, sensory, or mixed?
Trigeminal, mixed
is the trigeminal visceral or somatic motor/ sensory?
Somatic motor, somatic sensory
What muscles does the trigeminal innervate? Sensory structures?
mandibular arch muscles, skin of head, teeth, nasal passages,tongue
What is CN VI? Motor, sensory, or mixed?
Abducens, motor
is the abducens somatic or visceral motor?
somatic motor
what does the Abducens innervate
lateral rectus
What is CN VII? Sensory, motor, or mixed?
Facial, mixed
Is the facial nerve visceralor somatic?
both
What does the facial nerve innervate?
muscles of facial expression, lacrimal, sublingual, submandibular
what sensory structure does the facial nerve innervate?
taste buds in anterior 2/3 of tongue, ectoderm in fishes
what is CN VIII? Sensory, motor, or mixed?
vestibulocochlear, sensory
IS the vestibulocochlear visceral or somatic?
somatic
what does the vestibulocochlear innervate?
semi-circular canals,cochlea
What is CN IX? Sensory, motor,or mixed?
glossopharyngeal, mixed
is the glossopharyngeal somatic or visceral?
both
what muscles does the glossopharyngeal innervate?
muscles derived from 1st branchial arch
what sensory structures does the glossopharyngeal innervate?
posterior 1/3 of tongue
What is CN X? Sensory, motor, or mixed?
vagus, mixed
Is the vagus somatic or visceral?
both
what sensory structures does the vagus innervate?
posterior pharynx, thoracic and abdominal viscera
What muscles does the vagus innervate? Glands?
intrinsic muscles of the larynx, smooth muscle, glands of thoracic, abdominal viscera, cardiac muscle
What is CN XI? Sensory, motor, mixed?
accessory, motor
is the accessory somatic or visceral?
somatic
what does the accessory innervate?
sternomastoid, trapezius, cleidomastoid
what is CN XII? sensory, motor, mixed?
hypoglossal, motor
is the hypoglossal visceral or somatic?
somatic
what does the hypoglossal innervate?
muscles of tongue