019 the intracranial region Flashcards
what are the 2 key parts/bone elements of the skull?
- neurocranium - top and back of skull ( main areas)
- viscerocranium - face and jaw
what are fontanelles?
large membranous filled gaps in the skull for movement and deformation during birth and postnatal growth to accommodate the developing brain
- mostly close during the 1st year of life
what holds the bones in the skull together?
- sutures = immobile fibrous joints, mostly made up of type 1 collagen
- are there until about age 21 when they start to ossify
what is the pterion?
- spot above the ear where the parietal, frontal, sphenoid, and temporal bones join together
- it is the weakest part of the skull
- the middle meningeal artery runs underneath it = a trauma here can cause epidural haematoma
what is the intracranial region floor divided into?
3 fossae / depressions
- anterior, middle and posterior cranial fossae
- go down like steps
what is a?
sphenosquamous suture
what is b?
squamous suture
what is c?
squamous part of temporal bone
what is d?
parietal bone
what is e?
parietomastoid suture
what is f?
lambdoid suture
what is g?
asterion
what is h?
occipital bone
what is i?
occipitomastoid suture
what is j?
mastoid part of temporal bone
what is k?
mastoid process
what is l?
tympanic part of temporal bone
what is m?
styloid process
what is n?
condylar process
what is o?
angle of mandible
what is p?
ramus of mandible
what is q?
zygomatic process of temporal bone
what is r?
coronoid process
what is s?
temporal process of zygomatic bone