EAR ANATOMY
also known as the eardrum?
What is tympanic membrane
Articulates with all 7 cranial bones
What is Sphenoid
The bump along the midline of the lower back of the head
What is the inion
This suture separates the frontal bone from the two parietal bones
What is coronal suture
Equalizes pressure
what is eustachian tubes
Articulates with 8 facial bones
What is the frontal bone
Depression at the bridge of the nose
What is nasion
soft spot on an infant skull that closes at around 18 months
What is anterior fontanel (bregma)
Smallest bone
Stapes
The densest portion of bone in the skull
What is Petrous pyramid
7 degrees
What is the difference between OML & IOML
Suture seen only on a lateral skull view and forms between parietal and temporal bones
What is squamosal suture
Fluid within canals help maintain sense of direction and balance
Semicircular canals
Processes that form part of the nasal walls
What is Pterygoid processes
Line from outer canthus to EAM
What is the orbitomeatal line
Small isolated bones that can develop in the lambdoidal suture in adults
Sutural/Wormian bones
Thin portion of the temporal bone that separates the mastoid air cells from the brain
What is tegmen tempani
At the level of TEA in the temporal bone
What is Petrous ridges
Only line that doesn’t connect to the EAM
What is Glabelloalveolar
Junction of the parietal, temporal and occipital bones
What is the asterion