SKULL Flashcards
Skull contains ____ bones divided into the cranial and facial bones
22
How many cranial bones are in the skull? How are they divided?
8 cranium bones divided into calvaria and floor
Which bones articulate with the parietal bone?
Frontal Temporal Occipital Sphenoid And opposite parietal bones
What foramen is in the occipital bone and what passes through it?
Foramen magnum, the inferior portion of the medulla oblongata passes through to join the spinal cord
The ethmoid bone has two lateral masses called
Labryinths
What bones do the sphenoid bone articulate with?
All other 7 bones of the cranium
The ________ of the temporal bones contains organs of hearing and balance
Petromastoid portion
The occipital bone articulates with
Parietals
Temporals
Sphenoid
C1
What is the function of facial bones?
Provide shape and support for the face
Cranial and facial bones are joined by fibrous joints called
Sutures (except for mandible)
The junction of the coronal and sagittal suture
Bregma
The junction of lambdoidal and sagittal suture
Lambda
The junction of the parietal, squamosal, and greater wing of sphenoid
Pterion
The junction of the occipital, parietal, and mastoid portion of the temporal bone
Asterion
How many incomplete ossifications are there in a newborns skull?
6 called fontanels
What are the average measurements of the skull?
6 inches side to side
7 front to back
9 vertex to submental region
Where is the sphenoid fontanel located?
Pterion junction
Which cranial type is short and broad from side to side? Petrous portions form what angle with the msp…
Brachycephalic, 54 degrees
Which cranial type is typical/average? Petrous portions form what angle with the msp…
Mesocephalic, 47 degrees
Which cranial type is long and narrow side to side? Petrous portions form what angle with the msp…
Dolichocephalic, 40 degrees
Which of all the sinuses are well developed at birth?
Maxillary
Another name for maxillary sinuses?
Antra of highmore
Maxillary sinuses are roughly __ in shape
Pyrimidal
What is the second largest sinuses?
Frontal
Where is the ethmoid sinuses located?
Lateral masses
T or F, Sphenoidal sinuses are always paired
False, normally paired but can be SINGLE
Where is the sphenoid sinuses located?
Sphenoid bone below sella turcica
Sinus group visuallized in the lateral view
All 4 sinuses
What bone articulates with the zygoma to help form cheeks?
Maxillary bone
Facial bone that helps form bridge of the nose and articulates with…
Nasal bones, articulates with opposite nasal bones, maxillary bone, and frontal bone
Zygomatic process is found on …
Maxillary and temporal bone
Smallest bone in the skull
Lacrimal
What passes through the lacrimal foramen?
Tear of duct
The lacrimal forms the __ wall of the orbits
Medial
Maxillary bone forms the __ walls and most of the __ of the nasal cavity
Lateral, floor
