Skeletal Framework- Facial and cranial bones

Why are we interested in the bones of the skull? (1)

They serve as a place of attachment for various muscles of articulation

Why are we interested in the bones of the skull? (2)

provides bony framework for various cavities related to articulation

Why are we interested in the bones of the skull? (3)

bony protection for brain

What are the two groups of bones the skull is comprised of?

Facial bones and cranial bones

What are the (8) facial bones

1. Nasal

2. zygomatic

3, Maxilla

3. Mandible

5. Vomer

6. Inferior Nasal concha

7. Lacrimal

8. palatine

1. Nasal L.nose

Bony bridge of nose

2. Zygomatic G.yoke

Lateral "cheek" bone

3. Maxilla L.Jaw

upper jaw

Maxilla- inferior view

contributes to anterior portion of hard palate

What is the hard palate?

bony roof of mouth

Mandible L.to chew

lower jaw

5.Vomer L.Plough

Contrubites to medial wall of nasal cavity- bottom 1/2

Vomer- saggital view

6. Inferior Nasal Concha L.shell

Contrubites to lateral wall of nasal caity- bottom 1/3

Inferior Nasal Concha saggital view

7. Lacrimal L.Tear

contributes to medial wall of orbit cavity (eye socket)

8. Palatine L.Roof of mouth

Contrubites to posterior portion of hard palate

Maxilla- saggital view

Palatine- inferior view

Palatine- frontal isolated view

What are the (6) cranial bones

frontal, parietal, temporal, occipital, sphenoid, ethmoid

1. Frontal L.Front

Forehead

2. Parietal bone L.wall

just behind frontal bone

3. occipital bone L.Back of head

occipital bone- posteroinferior vieew

4. Temporal bone L.temple

temporal bone- inferior view

5. Ethmoid bone gk.sieve

contributes to medial wall of nasal cavity- upper 1/2

-- also contributes to lateral wall of nasal cavity upper 2/3s

-- also includes passageways for olfactory nerve

ethmoid bone- lateral view

ethmoid bone- superior view

holes are passageways for the oflactory nerve to get to brain for interpretation

6. Sphenoid gk.wedge

Sphenoid inferior view

sphenoid (superior view)

Sphenoid bone- isolated

Whole thing. Not just green part

--- resembles a "flying bat"

What are the 4 landmarks of the sphenoid bone

1. Lateral pterygoid

2. medial pterygoid

3. hamulus

4. pterygomandibular ligament

1. Lateral pterygoid gk. wing like

paired vertical bony projections- most lateral

2. medial pterygoid

paired vertical bony projections- most medial

3. hamulus (L.Hook)

hook like projection of medial pterygoid

4. pterygomandibular ligament (sometimes called raphe)

extends from hamulus to mandible

pterygomandibular ligament in situ