sense of smell

14-1

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Olfactory bulb

Olfactory tract

Nasal mucosa

Cribriform plate ofethmoid boneFascicles ofolfactory nerve (I)

Figure 14.28

provides vision14-2

Figure 14.29

Eyeball

Optic nerve (II)

Optic chiasmOptic tract

Pituitary gland

Optic foramen/canal

controls muscles that turn the eyeball up, down, and medially, as well as controlling the iris, lens, and upper eyelid14-3

Oculomotor nerve (III):

Superior orbital fissure

Superior branch

Inferior branch

Ciliary ganglion

Figure 14.30

eye movement (superior oblique muscle)14-4

Trochlear nerve (IV)

Superior orbital fissure

Superior oblique muscle

most important sensory nerve of the face 14-5

provides eye movement (lateral rectus m.)

14-6

Figure 14.33

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Abducens nerve (VI)

Superior orbital fissure

Lateral rectus muscle

motor – major motor nerve of facial muscles: facial expressions; salivary glands and tear, nasal and palatine glands

sensory - taste on anterior 2/3’s of tongue14-7

nerve of hearing and equilibrium14-8

swallowing, salivation, gagging, control of BP and respiration 14-9

• major role in the control of cardiac, pulmonary, digestive, and urinary function

• swallowing, speech, regulation of viscera

14-10

swallowing, head, neck and shoulder movement14-11

Accessory nerve (XI)

Cranial root of XI

Spinal root of XI

Posterior view

Vagus nerve

Sternocleidomastoidmuscle

Trapezius muscle

Jugularforamen

Foramenmagnum

Spinal nervesC3 and C4

tongue movements for speech, food manipulation and swallowing14-12

Figure 14.39