Cranial Nerves Flashcards
CN I
OLFACTORY Sensory: smell Motor: x Test: familiar odor Pathway: foramina in cribiform plate
CN II
OPTIC Sensory: Sight Motor: x Test: visual fields Pathway: optic canal
CN III
OCULOMOTOR
Sensory: x
Motor: Voluntary–superior/medial/inferior recti, inferior oblique. Autonomic–smooth muscle
Test: upward, downward, medial gaze; reaction to ligth
Pathway: supraorbital fissure
CN IV
TROCHLEAR Sensory: x Motor: Voluntary--superior obique Test: downward and inward gaze Pathway: supraorbital fissure
CN V
TRIGEMINAL (V1 opthalmic V2 maxillary V3 mandibular)
Sensory: touch, pain (sensation) to skin of face, mucous membrane, mouth
Motor: Voluntary–mm. of mastication
Test: face sensation, clench teeth
Pathway: V1 supraorbital fissure V2 foramen rotundum V3 foramen ovale
CN VI
ABDUCENS Sensory: x Motor: Voluntary--lateral rectus Test: lateral gaze Pathway: supraorbital fissure
CN VII
FACIAL
Sensory: taste (ant. 2/3 of tongue)
Motor: Voluntary–mm. of facial expression, Autonomic–lacrimal, submandibular, sublingual glands
Test: close eyes, smile, puff cheeks, familiar tastes
Pathway: Internal acoustic meatus
CN VIII
VESTIBULOCOCHLEAR Sensory: hearing (ear), balance (ear) Motor: x Test: hearing, balance coordination Pathway: internal acoustic meatus
CN IX
GLOSSOPHARYNGEAL
Sensory: touch (sensation), taste of post. 1/3 tongue
Motor: Voluntary–pharynx mm, Autonomic–parotid gland
Test: gag reflex, swallowing
Pathway: jugular foramen
CN X
VAGUS
Sensory: touch (sensation) of pharynx, larynx, bronchi, taste of tongue, epiglottis
Motor: Voluntary–palate, pharynx, larynx, Autonomic–thoracic and abdominal viscera
Test: Gag reflex, ability to swallow, say AHHH
Pathway: jugular foramen
CN XI
ACCESSORY Sensory: x Motor: trapezius, SCM Test: resisted shoulder shrug Pathway: jugular foramen
CN XII
HYPOGLOSSAL Sensory: x Motor: voluntary--tongue mm. Test: tongue protrusion Pathway: hypoglossal canal
