ANATOMY - skull Flashcards
which 3 bones make up the anterior cranial fossa floor
frontal
ethmoid
lesser wings of sphenoid bone
which 2 bones make up the middle cranial fossa floor
lesser wings of sphenoid bone
petrous part of temporal bone
which 2 bones make up the posterior cranial fossa floor
petrous art of temporal bone
occipital bone
what is the part of the ethmoid bone that is between the cribriform plates (where CN I exits)
crista galli of ethmoid bone
there is a groove in the floor of the middle cranial fossa, what makes this groove
middle meningeal artery
what is the suture called between the frontal bone and the parietal bone
coronal suture
what is the suture called between the 2 parietal bones
sagittal suture
what is the suture between the parietal, frontal, temporal and sphenoid bones called
what shape is it
pterion
H shaped
what is the notch on the occipital bone called
external occipital protruberance
what is the clinical significance of the pterion (H shaped suture between frontal, parietal, temporal and sphenoid bones)
what condition does fracture of this suture put someone at risk of
v thin = commonly fractured
middle meningeal artery branch is right underneath it = EXTRADURAL HAEMORRHAGE
what type of joints are suture
fibrous joints
what are the 5 layers of the scalp
SCALP
skin connective tissue aponeurosis - between muscles loose connective tissue pericranium (skull)
in which layer of the scalp is the arterial supply
first layer of connective tissue (just under skin)
which arteries supply the blood supply to the scalp
internal (via ophthalmic) and external carotids
what is the clinical significance of the blood supply in the scalp
rich blood supply, lots of anastomoses
= bleeds profusely in lacerations
