Cranial Nerves (Motor and Sensory Distribution): Schema

¦Efferent (motor) fibers

¦Afferent (sensory) fibers

Olfactory Optic

IIIOculomotor

Ciliary muscle, sphincter ofpupil and all external eye

muscles except those below

IVTrochlear

Superior oblique muscle

VIAbducens-

Lateral rectusmuscle

VTrigeminal

Sensory—face

IXGlossopharyngeal

Sensory—posterior % of tongue,tonsil, pharynx, middle ear

Motor—stylopharyngeus, upperpharyngeal muscles, parotid gland

XIIHypoglossal

Tongueuscles

Strapmusclesby ansa

cervicalis

XIAccessory

Sternocleidomastoid,trapezius muscles

XVagus

Motor—heart, lungs, palate, pharynxlarynx, trachea, bronchi, CI tractSensory—heart, lungs, trachea,

bronchi, larynx, pharynx,Gl tract, external ear

PLATE 112HEAD AND NEGK

ii%*

23

17

16:

1-0

BRAIN

1.cerebral cortex2.longitudinal fissure3.gyrus4.sulcus5.cerebellum6.spinal cord7.corpus callosumS. septum peilueidum

(lateral ventricleis behkd this)

9.pineal gland10.superior colliculus11.cerebral aqueduct12.thalamus13.hypothalamus14.pituitary gland15.midbrain ^16.pons 's—-

17.medulla oblongata18.third ventricle19.optic nerve20.fourth ventricle21.olfactory bulb22.olfactory tract I23.optic chiasma n24.oculomotor n. Hi25.trigeminal n. V26.abducens n. VI27.fecial n. VU29, glossopharyngeal i

K29.vagus n. X30.hypoglossal n. XD31.spinal accessory n

XI

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