Neuro Flashcards
(31 cards)
Oculomotor nerve 3
Motor to several extraocular mm
Trochlear nerve 4
Motor to superior oblique m
Trigeminal nerve 5
sensory to eyelids, cornea, lacrimal gland
Abducens nerve 6
motor to lateral rectus m and retractor bulbim
Facial nerve 7
motor to eyelids
vestibulocohlear nerve 8
vestibular component of ochlear nmovements
Afferent
Sensory
Efferent
Motor
visual sensory system (CN 2)
Sympathetic and parasympathetic
autonomic nervous system
Pupillary light reflex (PLR)
Pupillary constriction with bright light
Afferent: CN2
Efferent: CN3
Dazzle reflex test
Bright light in front of eye= eye close
Afferent: CN 2
Efferent: CN 7
What is the autonomic nervous system
balance between para/sympathetic innervations of iris= pupil size
Miosis
small pupil
Mydriasis
large pupil
Anisocoria
unequal pupil size
What are some characteristics of PRL’s
subcortical response
Does not test vision
Help localize a lesion
Both pupils should constrict when a bright light goes in one
What does sympathetic innervation do to the eye
Pupil dilation
Optic nerve 2
Sensory from retina to cortex
What is the Schirmer Tear Test
assessment of the basal and reflex tear production
1st order neurons
T1-T3
Diencephalic autonomic centers
2nd order neurons
Preganglionic
leave spinal chord by T1-T3 roots
Join vago-sympathetic trunk and cranial cervical ganglion
Horners syndrome
Sympathetic nerve paralysis
What does the occulomotor system consist \of
CN3(oculomotor n): Dorsal, ventral, medial, rectus muscles, inferior oblique
CN4(trochlear): superior oblique
CN6(abducens): lateral rectus, retractor bulbi
Strabismus
Lack of parallelism of the visual axes of the eyes
