0071509674.pdf

IX Jugular foramen Oropharynx Sensation to posterior

tongue and pharynx,

afferent limb of gag

reflex; taste from

posterior part of

tongue, carotid reflex

Motor to stylopharyn-

geus muscle

X Jugular foramen Pharynx, larynx Laryngeal sensation,

afferent limb of cough

reflex; epiglottic taste

Motor to palatine and

laryngeal muscles

XI Foramen magnum, Sternomastoid and Motor to sternomastoid

jugular foramen trapezius muscles and trapezius muscles

XII Anterior condylar Tongue Motor to all intrinsic

canal and most extrinsic

tongue muscles

COURSE, DISTRIBUTION & PRINCIPAL FUNCTION OF CRANIAL NERVES

CN Foramen Distribution Function

Pupil Constriction CN III parasympathetic

Dilation Sympathetic chain

Ciliary muscle Accommodation CN III parasympathetic

Superior tarsal Augment levator Sympathetic chain

muscle palpebrae

superioris

Levator Elevate eyelid CN III (Oculomotor)

palpebrae

superioris

Medial rectus Adduction CN III (Oculomotor)

Superior rectus Elevation Adduction, intorsion CN III (Oculomotor)

Inferior oblique Elevation Abduction, extorsion CN III (Oculomotor)

Inferior rectus Depression Adduction, extorsion CN III (Oculomotor)

Superior oblique Depression Abduction, intorsion CN IV (Trochlear)

Lateral rectus Abduction CN VI (Abducens)

ORBITAL MUSCLE FUNCTION AND INNERVATION

Secondary

Primary Functions

Muscle Function (normally balance) Innervation

66