ppt 1 cranial joints

cranial joints are called_____ and why?

Cranial joints are called sutures because they look like they are stitched together!

there are 4 sutures of the cranium. What are they called

1. sagittal suture

2. coronal suture

3. squamosal suture

4. lamboidal suture

the sagittal suture is located bt?

the parietal bones

the coronal suture is located bt

frontal bone and parietal bone

the squamosal suture is located b/t

temporal bone and parietal bone

the lamboidal suture is located bt

partietal bone and occiptal bone

sutures are what kind of joint? are they mobile or immobile

• sutures are fibrous joints

• they are immobile

fontanelles are what kind of tissue? what do they allow for?

membranous soft tissue. fontanelles allow for growth of the brain

fontanelles are only found in____ when do they ossify?

• fontanelles are only found in fetus/ newborn babies

• fontanelles ossify later in life @ different stages of life after birth

posterior fontanelle is located b/t which bones? and closes at what developmental stage?

1. posterior fontanelle is located between the parietal and occiptal bones

2. closes at 2-3 months

Sphenoidal fontanelle is located b/t which bones? and closes at what developmental stage?

• located b/t frontal, parietal, sphenoid, and temporal bones

• closes at 6 months

Mastoid fontanelle is located b/t which bones? and closes at what developmental stage?

• located b/t temporal, parietal, occipital bones

• closes at 6-18 months

Anterior fontanelle is located b/t which bones? and closes at what developmental stage?

• bt frontal and parietal bones

• last to close closes at 18-24 months (2 years)

name the facial bones (8)

1. nasal

2. lacrimal

3. zygomatic

4. inferior nasal concha

5. maxilla

6. vomer

7. mandible

8. palatine

what does the nasal bone form?

superior part of nasal cavity

zygomatic bone is also known as?

check bone

vomer bone forms?

lower part of nasal septum

maxilla forms____ mandible forms

• maxilla forms upper jaw

• mandible forms lower jaw

lacrimal bone is located where in relation to nasal bones?

posterior to nasal bones

maxilla and palatine bone form?

hard palate/ roof of mouth

bone features of mandible (4)

• mandibular condyles

• coronoid process

• mandibular foramina

• mental foramina

describe the functions of the bone features in the mandible

1. mandibular condyles articulate with mandibular fossae to form temporo-mandibular joints

2. coronoid process-attachment site for mastication muscles

3. mandibular foramina- passageway for V3 (mandibular nerve) innervates lower teeth

4. Mental foramina: passageway for V3 (mandibular nerve) innervating chin