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HEAD/NECK I:IntroductionThe Skull

Head function brainstorm

Sensory/Motor Targets

Overview: Head/Neck I-IV

The two-oval skull

Major features of the skull

The base of the skull

The developmental view

The holes-out view

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What all does the head do?[brainstorm]

Special Sense Foodway Airway Glands/Mucous

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Nerve targets in head

SENSORY

Special General

MOTOR

Muscles Glands

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Overall skull organization

Cerebral Hemisphere

Cerebellum

Neurocranium

Base of skull Middle ear

Jaw

Throat

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Major features of the skull Mastoid process

Styloid process External auditory/

acoustic meatus

(ear opening)

Ear drum

Hyoid bone

Epiglottis

Thryroid cartilage

Cricoid cartilage

Tracheal rings

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M&M, Fig. 7.3

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Major features of the skull Zygomatic arch

Ethmoid Orbit

Nasal aperture

(choanae inside)

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M&M, Fig. 7.2

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Base of the skulla developmental view

Dermal bones inneurocranium

Chondral bone

at base of skull

Olfactory capsule

(part of ethmoid)

Optic capsule

(part of sphenoid)

Otic capsule

(part of temporal

Occipital bone

(from somites

like C-verts)

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Base of the skullcranial nerves out Ethmoid (olfactory)

I. Olfactory

Sphenoid (optic)II. Optic

III. Oculomotor

IV. Trochlear

VI. Abducens

Temporal (otic)VIII. Acoustic/Auditory/

Vestibulocochlear

Face/Jaws

V. Trigeminal

VII. Facial

Throat (rest of body)

IX Glossopharyngeal

X. Vagus

XI. Spinal AccessoryXII. Hypoglosal

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Whats ahead?

Throat (pharynx) targets: Head/Neck II

Special Sensory targets: Head/Neck III

Back to cranial nerves: Head/Neck IV