Axial Skeleton - Skull and Articulations Flashcards
What needs to be true in order for a bone to be considered cranial?
it needs to be in direct contact with the meninges
What is the meninges?
“shrink wrap” covering around brain
What is the “shrink wrap” covering around the brain called?
the meninges
What are the three layers of the meninges?
Dura mater, Arachnoid, and Pia mater
What are the six cranial bones?
- Parietal (2)
- Ethmoid
- Sphenoid
- Temporal (2)
- Occipital
- Frontal
Which two cranial bones are paired?
Temporal and Parietal
What is the acronym used to memorize the cranial bones?
PEST OF 6
What is the cranial bone called that makes up the forehead?
frontal bone
Which bones make up the cranium wall and roof?
parietal bones
Which pair of bones is bordered by four sutures?
parietal bones
What are the four sutures that border the parietal bones and where are they located?
- coronal- separates frontal and parietal bones
- sagittal- separates the two parietal bones
- lambdoid- separates the parietal and occipital bones
- squamous- separates the temporal and parietal bones
How do the sutures work that line the parietal bones, in relationship to existence and growth from a young age?
When you’re born, bones are not fully connected so that you can squeeze through the birth canal, and so that your brain can grow.
What are the soft spots on a baby’s head called?
fontanelles
What are the five main components of the temporal bone?
zygomatic process, mandibular fossa, external auditory meatus, styloid process of the temporal bone, mastoid process, and internal auditory meatus
What is the zygomatic process and where is it located?
The zygomatic process of the temporal bone pairs with the temporal process of the zygomatic bone to make the zygomatic arch, or cheekbone.
What is the mandibular fossa and where is it located?
an inferior notch where the mandible articulates, located on the temporal bone