Head: External Skull Flashcards
1
Q
Parts of the cranium (skull)
A
- Neurocranium
- Viscerocranium
2
Q
Calvaria (skullcap) formation
A
- Flat bones formed by intramembranous ossification
3
Q
Calvaria (skullcap) consists of
A
- Frontal, parietal, occipital bones
4
Q
Neurocranium components
A
- Calvaria (skullcap)
- Basicranium
5
Q
Basicranium formation
A
- Irregular bones formed by endochondral ossification (or both endochondral and intramembranous)
6
Q
Basicranium consists of
A
- Ethmoidal, sphenoidal, temporal bones
- Frontal and occipital bones also contributes to cranial base
7
Q
Viserocranium
A
- 15 bones that form the face
- 3 unpaired
- 6 paired
- Some contain paranasal sinuses
8
Q
3 unpaired bones of viserocranium
A
- Mandible
- Vomer
- Ethmoid
9
Q
6 paired bones of viserocranium
A
- Maxillae
- Inferior nasal conchae
- Zygomatic
- Palatine
- Nasal
- Lacrimal
10
Q
Viserocranium forms these structures
A
- Upper and lower jaw
- Orbit
- Nasal and oral cavities
- Hard palate
11
Q
Viserocranium is a supporting structure for
A
- Nasal cavity
- Orbit
- Oral cavity
12
Q
Sutures
A
- Fibrous joint that connect articulating bones of the skull
- Typically described as immovable
- Obliterate later in life (synostosis)
13
Q
Fontanelles
A
- Fibrous membranes in the neonate
- Separate calvaria bones
- Help facilitate head passage through birth canal
- Allow for brain growth
14
Q
Anterior Fontanelle
A
- Junction of the coronal and sagittal sutures
- Largest
- Future site of bregma
- Usually closed by 18 months
15
Q
Anterior Fontanelle clinical importance
A
- Hydration status
- Intracranial pressure
