ANATOMY UNIT 3 CRANIAL NERVES

CN1 OLFACTORY

SMELL (SENSORY)

CN2 OPTIC

SIGHT (SENSORY)

CN3 OCULOMOTOR

EYEBALL MOVEMENT : MR; IR; SR; IO (MOTOR)

MOVEMENT OF UPPER EYELID : LP (MOTOR)

PUPILLARY LIGHT REFLEX (PARASYMPATHETIC)

CN4 TROCHLEAR

EYEBALL MOVEMENT, SUPERIOR OBLIQUE (MOTOR)

CN5 TRIGEMINAL

V1: OPTHALMIC: FACIAL SENSATION (SENSORY) & PUPILLARY DIALATION (PARASYMPATHETIC)

V2: MAXILLARY: FACIAL SENSATION (SENSORY)

V3: MANDIBULAR: CHEWING (MOTOR) & FACIAL SENSATION (SENSIORY)

CN6 ABDUCENS

EYEBALL MOVEMENT (MOTOR)

-LATERAL RECRUS

CN7 FACIAL

1. TASTE: ANTERIOR 2/3 OF TONGUE (SENSORY)

2. FACIAL EXPRESSION, EYELID CLOSING (MOTOR)

3. LACRIMATION, SALVATION - SUBMANDIBULAR + SUBLINGUAL GLAND (PARASYMPATHETIC)

CN8 VESTIBULOCOCHLEAR

HEARING COCHLEA (SENSORY)

CN9 GLOSSOPHARYNGEAL

1. SENSATION FROM POSTERIOR 1/3 OF TONGUE, TONSILS, MIDDLE EAR AND PHARYNX (SENSORY)

2. STYLOPHARYNGEUS MUSCLE - ELEVATES PHARYNX + LARYNX (MOTOR)

3. SALVATION - PAROTID GLAND (PARASYMPATHETIC)

CN10 VAGUS

1. SWALLOWING, ELEVATION OF PALATE, TALKING, COUGHING, GAG REFLEX (MOTOR)

2. HEART RATE + GI, SWEATING, VASOVAGAL SYNCOPE (PARASYMPATHETIC)

3. PERIPHERAL CHEMORECEPTORS - HYPOXEMIA (SYMPATHETIC)

CN11 SPINAL ACCESSORY

HEAD TURNING, SHRUGGING (MOTOR)

CN12 HYPOGLOSSAL

MOST MUSCLES OF TONGUE - TONGUE MOVEMENT (MOTOR)

WHAT ARE CRANIAL NERVES?

PAIRS OF NERVES IN THE BRAIN THAT CONNECT TO THE FACE, NECK, AND TORSO.

WHAT IS THE LONGEST NERVE IN THE BODY?

VAGUS NERVE

CN1

OLFACTORY - SENSORY FOR SMELL

CN2

OPTIC - SENSORY FOR VISION

CN3

OCULOMOTOR - MOTOR FOR EYE MOVEMENT

CN4

TROCHLEAR - MOTOR FOR EYE MOVEMENT

CN5 V1

TRIGEMINAL OPTHALMIC FACIAL SENSATION AND PUPIL DILATION

CN5 V2 MAXILLARY

FACIAL SENSATION

CN5 V3

MANDIBULAR - FACIAL SENSATION AND MOTOR CONTROL OF MASTICATION CHEWING

CN6

ABDUCENS - EYE MOVEMENT LATERAL RECTUS

CN7

FACIAL - MOTOR CONTROL OF FACIAL EXPRESSIONS AND SENSATION ANTERIOR 2/3 TONGUE

CN8

VESTIBULOCOCHLEAR - HEARING AND BALANCE

CN9

GLOSSOPHARYNGEAL - TASTE, POSTERIOR 1/3 TONGUE, SWALLOWING, SALIVARY GLAND

CN10

VAGUS - INFLUENCES HEART RATE, GUT FUNCTIONS, AND MOTOR CONTROL OF LARYNX

CN11

SPINAL ACESSORY - MOTOR CONTROL OF NECK AND SHOULDERS

CN12

HYPOGLOSSAL - MOTOR CONTROL OF TONGUE MOVEMENT