Anatomy 5 - The Skull Flashcards
Functions of the skull
Support and protect; the brain, cranial nerves, organs of special sense, beginning of respiratory and alimentary tract.
Bones of the neurocranium
Frontal, parietal, occipital, temporal, ethmoid and sphenoid
Bones of the viscerocranium
Nasal, lacrimal, maxilla, mandible, zygomatic, hyoid, palatine, inferior conchae and the vomer
What does the neurocrainium house
The brain
What does the viscerocranium house
Soft tissue and it also allows for attachment of the muscles of facial expression
What is within the upper viscerocranium
The orbits and the nose
What is within the lower viscerocranium
The mandible and the hyoid
Characteristics of the hyoid
It doesn’t articulate with any other bones and is fully embedded in soft tissue
What bone forms most of the back wall of the orbit
The sphenoid
What does the sphenoid articulate with
The occipital
What does the parietal articulate with
The frontal, occipital, temporal and sphenoid
What bone makes up the inner medial wall of the orbit
The ethmoid
What are cranial sutures
Articulation between bones of the cranium which are initially open but may fuse with time
Where does the coronal suture sit
Between the frontal and parietal bones
What suture splits the skull anteriorly and posteriorly
The coronal suture
Where does the sagittal suture cut
It runs between the two parietals
Describe the squamosal suture
It is flat, runs along the temporal and parietal and the bones overlap
Where is the metopic suture
Between the left and right frontal (only present in children)
If the metopic suture is still present in adults it is known as
A retained metopic suture
Where does the basilar suture cut
Between the occipital and sphenoid bones
When does the basilar suture fuse
Between 16 and 18 years old
Where are the para-nasal sinuses found
On either side of your nose
Where is the maxillary sinus
At the top of the head
What is the characteristic of the frontal sinus
It has a unique pattern
