Human Anatomy, Frolich, Head/Neck I: Introduction—the Skull

HEAD/NECK I: Introduction—The 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

Human Anatomy, Frolich, Head/Neck I: Introduction—the Skull

What all does the head do?[brainstorm]

Special Sense Foodway Airway Glands/Mucous

Human Anatomy, Frolich, Head/Neck I: Introduction—the Skull

Nerve “targets” in head• SENSORYSpecial General

• MOTORMuscles Glands

Human Anatomy, Frolich, Head/Neck I: Introduction—the Skull

Overview Head/Neck I-IV

• Head I: Skull—a framework to hang on– Overall organization of skull– Base of the skull—the hard part

• Developmental view• Cranial nerves out (to “targets”)

• Head II: Throat targets• Head III: Special Sense targets• Head IV: Cranial nerves in depth

Human Anatomy, Frolich, Head/Neck I: Introduction—the Skull

Overall skull organization

Cerebral Hemisphere

Cerebellum

• Neurocranium• Base of skull• Middle ear• Jaw• Throat

Human Anatomy, Frolich, Head/Neck I: Introduction—the Skull

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

Human Anatomy, Frolich, Head/Neck I: Introduction—the Skull

M&M, Fig. 7.3

Human Anatomy, Frolich, Head/Neck I: Introduction—the Skull

Major features of the skull• Zygomatic arch• Ethmoid• Orbit• Nasal aperture• (choanae inside)

Human Anatomy, Frolich, Head/Neck I: Introduction—the Skull

M&M, Fig. 7.2

Human Anatomy, Frolich, Head/Neck I: Introduction—the Skull

Base of the skull—a developmental view

• Dermal bones in neurocranium

• 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)

Human Anatomy, Frolich, Head/Neck I: Introduction—the Skull

Base of the skull—cranial nerves out• Ethmoid (olfactory)

I. Olfactory• Sphenoid (optic)

II. OpticIII. OculomotorIV. TrochlearVI. Abducens

• Temporal (otic)VIII. Acoustic/Auditory/

Vestibulocochlear• Face/Jaws

V. TrigeminalVII. Facial

• Throat (rest of body)IX GlossopharyngealX. VagusXI. Spinal AccessoryXII. Hypoglosal

Human Anatomy, Frolich, Head/Neck I: Introduction—the Skull

Human Anatomy, Frolich, Head/Neck I: Introduction—the Skull

What’s ahead?

• Throat (pharynx) targets: Head/Neck II

• Special Sensory targets: Head/Neck III

• Back to cranial nerves: Head/Neck IV