Exam 3 Flashcards-Neuro
superior rectus
moves eyes up
inferior rectus
moves eyes down
medial rectus
moves eyes in
inferior oblique
extorsion/external rotation of eye
levator palpebrae superioris
lifts eyelid
pupillary sphincter
constricts pupil
ciliary muscle
changes shape of lens
superior oblique
intorsion/internal rotation of eye
trigeminal sensory
three regions
V1: ophthalmic
V2: maxillary
V3: mandibular
trigeminal motor
jaw muscles
lateral rectus
moves eye out
facial sensory
anterior tongue
facial motor
facial & eyelid muscles; stapedius muscle
glossalpharyngeal sensory
posterior tongue and throat
glossalpharyngeal motor
gag & swallowing reflexes
visceral branches
to throat, heart, lungs, & GI tract
skeletal muscle branches
muscles of swallowing and speaking
sternocleidomastoid
head mvmnt
upper trapezius
shoulder mvmt
hypoglossal
muscle of tongue
CN 3 test
eye movements
pupillary responses
CN 4 test
test simultaneously with oculomotor nerve
CN 5 test sensory
sensory testing of head region
corneal reflex testing
CN 5 test motor
jaw strength/observation for asymmetries
CN 6 test
test simultaneously with oculomotor nerve
CN 7 test sensory
discriminating tastes
(sour, sweet, salty, bitter)
CN 7 test motor
corneal blink reflex
smile, raise eyebrows, pucker
CN 9 test sensory
discriminating tastes
CN 9 test motor
gag reflex
swallow test
CN 10 test
gag reflex & swallow test (CN 9)
check for hoarseness, volume, and clearness of speech
CN 11 test
laterally flex head
rotate head
shrug shoulders
CN 12 test
stick tongue out
CN 3 possible lesion: Lateral strabismus
Eye deviates outward, causing double vision.
CN 3 possible lesion: Eye movement difficulty:
Trouble moving the eye up and down, which may also cause double vision.
CN 3 possible lesion: Ptosis:
Drooping of the eyelid
CN 3 possible lesion: Mydriasis:
Pupil dilation
CN 3 possible lesion: Near vision impairment:
Lens cannot focus on close tasks.
CN 4 possible lesion: Strabismus (eye extorsion):
Eye deviates up and in due to a weakened superior oblique muscle
CN 4 possible lesion: Strabismus (eye extorsion):
Functional impact: Causes difficulty with tasks like walking down steps or reading
Associated symptoms: Double vision (diplopia) and corrective head tilt
CN 5 possible lesion: sensory
Loss of sensation on the ipsilateral side of the head, face, and inner mouth; possible trigeminal neuralgia (sudden, severe facial pain)
CN 5 possible lesion: motor
Weakness in chewing and jaw deviation toward the affected side
CN 6 possible lesion: Medial strabismus:
Eye deviates inward due to a weakened lateral rectus muscle, causing double vision
CN 7 possible lesion: sensory:
Reduced taste on the front of the tongue
CN 7 possible lesion: motor:
Facial asymmetry, possible Bell’s palsy, and loss of the corneal blink reflex
CN 9 possbile lesion sensory:
Reduced taste on the back of the tongue
CN 9 possbile lesion motor:
Loss of gag and swallow reflexes, and difficulty swallowing (dysphagia)
CN 10 possible lesion visceral
Irregular heartbeat and breathing difficulties
CN 10 possible lesion skeletal
-Hoarseness (dysphonia)
-slurred speech (dysarthria)
-difficulty swallowing (dysphagia)
-loss of gag reflex
CN 11 possible lesion
Weakness in head lateral flexion, head rotation, and shoulder shrugging
CN 12 possible lesion
-Atrophy and paralysis on the same side of the tongue
-causing it to deviate toward the weakened side
-along with slurred speech (dysarthria)
-difficulty swallowing (dysphagia).
