NSE 13A/B Lecture Notes - Lecture 5: Sternocleidomastoid Muscle, Trapezius Muscle, Carotid Sinus
Cranial Nerves
Cranial Verve
Type of
Nerve
Function of Nerve
Test
I Olfactory
Sensory
smell
Identify familiar odours
II Optic
Sensory
vision
Direct inspection
Visual acuity; visual fields
Shining of light
III Oculmotor
Mixed
Motor: most EOM movement, opening of
eyelids
Parasympathetic: pupil constriction, lens
shape
Inspection
Extraocular muscle movement
Shining light in eye
IV Trochlear
Motor
Down and inward movement of eye
Extraocular muscle movement
V Trigeminal
Mixed
Motor: muscles of mastication
Sensory: sensation of face and scalp,
cornea, mucous
Superficial touch (3 divisions)
Corneal reflex
Clenching of teeth
VI Aducens
Motor
Lateral movement of eye
Extraocular muscle movement to R and L
sides
VII Facial
Mixed
Motor: facial muscles, close eye, labial
speech, close mouth
Sensory: taste (sweet, salty, sour, bitter) on
anterior two thirds of tongue
Parasympathetic: saliva and tear secretion
Wrinkling forehead; Closing Eyes Tightly
Smiling, Puffing out cheeks
Identifying tastes
VIII Accoustic
Sensory
Hearing and equilibrium
Hearing Acuity
IX Glossopharyngeal
Mixed
Motor: pharynx (phonation and
swallowing)
Sensory: taste on posterior one third of
tongue, pharynx (gag reflex)
Parasympathetic: parotid gland, carotid
reflex
Gag Reflex
