Module 4.1 Skull Flashcards
1
Q
Skull
A
22 bones
- cranium (8 bones)
- facial bones (14 bones)
2
Q
Cranium
A
- protects brain
- 8 bones fitted tightly together in adults
3
Q
Fontanelles
A
Aka soft spots
membranous region where certain bones are not completely formed in new borns
- allow bones of skull to compress during childbirth & expand to accommodate rapidly growing infant brain
- regions begin to close around 2 months but may last up to two years
4
Q
Bones in Cranium
A
frontal
parietal
temporal
occipital
same names as lobes
5
Q
Frontal bone
A
- one bone
- forms the forehead
6
Q
Parietal Bones
A
- two, paired bones
- extend to the sides
7
Q
Occipital Bone
A
curves to form the base of the skull
8
Q
Temporal Bone
A
opening that leads to the middle ear
9
Q
Sphenoid Bone
A
- completes the sides of the skull
- contributes to the floors &walls of the eye sockets
10
Q
Ethmoid Bone
A
- lies in front of the sphenoid
- part of the orbital wall
- component of the nasal septum
*sphenoid & ethmoid bones lie largely inside the skull
11
Q
Foramen Magnum
A
- large opening in occipital bone
- spinal cord passes it to become the brain stem
12
Q
Sinuses
A
- air spaces lined by mucous -membrane in bones of cranium
- reduce weight of skull & give resonant sound to voice
13
Q
Mastoid Sinuses
A
- drain into the middle ear
- 2 sinuses
14
Q
Mastoiditis
A
- inflammation of the mastoid sinuses
- can lead to deafness
15
Q
Sinusitis (sinus infection)
A
- soft tissues inside the sinuses become inflamed from virus, bacteria, or allergy
