39. cranial nerves Flashcards
how many nerves
12
name them
1 olfactory 2 optic nerve 3 occulomotor 4 trochlear 5 trigeminal 6 abducent 7 facial 8 vestibulocochlear 9 glossopharyngeal 10 vagus 11 accessory 12 hypoglossus
which are only sensory
olfactory, ocular and vestibulocochlear
which are motor and parasympathetic
occulomotor nerve
which are only motor
trochlear, abduscent, accessory, hypoglossus
which are sensory and motor
trigeminal
which are sensory, motor and parasympathetic
facial, glossopharyngeal, vagus
what nerves does PLR check
2 and 3
what nerves does menace check
2, 3, 4, 5, 6, 7
cerebellar deficit - ipsilateral loss
what nerves does corneal reflex test
5, 6, 7
what nerves does palpebral reflex test
5, 6, 7
what nerves does swallow reflex test
9, 10
what does cn 1 do
olfactory nerve
smell
what does cn 2 do
optic nerve
vision
what does cn 3 do
occulomotor move eyeball pupillary sphincter ventral, medial and dorsal rectus ventral oblique levator palpebra dorsalis
what does cn 4 do
trochlear
move eye
dorsal oblique muscle
what does cn 5 do
trigeminal
sensory innervation of face
motor of masticatory muscles
what does cn 6 do
abducent
move eye
lateral rectus muscle
what does cn 7 do
facial nerve
sensory - taste
motor - face expression muscles
parasymp - lacrimal gland, mandibular, sublingual salivary
what does cn 8 do
vestibulocochlear
hearing
vestibular function - adaption of body in regards to position of head
what does cn 9 do
glossopharyngeal
sensory - taste, caudal tongue
motor - muscle of pharynx and palate
parasymp - salivary gland - parotid, zygomatic
what does cn 10 do
vagus
sensory - phar, larynx, thx, abd viscera
motor - pharynx, larynx, esophagus muscle
parasymp - thorax, abd viscera
what does cn 11 do
accessory
motor
internal branch- join vagus, recurrent laryngeal muscle of larynx, pharynx
external branch: spinal segment C1-8 muscles of neck
what does cn 12 do
hypoglossus
motor innervation of tounge
what nerves are corners syndrome related to and what is it
cn 3, 4, 6
sympathetic denervation of orbit, mitotic pupil, third eyelid prolapse, exophthalmus
what are the three branches of cn 5
trigeminal nerve
ophthalmic - sensory
maxillary - sensory
mandibular - sensory + motor
