Cranium/Skull Flashcards
How is the Skull developed
From both intramembranous and endochondrial ossification
Skull of a newborn
All of the bones are unconnected and held together by connective tissue joints called sutures. This allows for passage through the birth canal and brain development
These remain open for the first few years of life
Scaphocephaly
Early closure of the sagittal suture
Prevents the skull from growing laterally
Oxycephaly
Early closure of the coronal suture
Prevents the skull from growing front to back
What divides the frontal bone from the parietal bone
Coronal Suture
Major Bone Sections of Face (11)
Frontal Parietal Temporal Occipital Ethmoid Sphenoid Lacrimal Nasal Zygomatic Maxilla Mandible
Parts of the Sphenoid Bone
Greater wing
Lesser wing
Body
Pterygold plates
Hypophyseal Fossa
Formed by the Sphenoid
The Pituitary Gland sits in this fossa
Parts of the Maxilla (5)
Zygomatic Process Orbital Surface Infraorbital Foramen Frontal Process Anterior Nasal Spine
Parts of the Mandible (5)
Ramus Body Mental Foramen Mental Tubercle Mental Protuberance
Lefort 1
Lefort 2
Lefort 3
Separates maxillary teeth from rest of face
Separates entire maxilla from rest of face
Fracture through the upper portion of orbits
3 Layers of Cranial Meninges
Dura
Arachnoid
Pia
Falx
Foldings of the Dura to support the brain
3 Places where ICH blood can pool
Extradural Space
Subdural Space
Subarachnoid Space (severe headache)
Tentoral Hernia
When the brain is placed under high pressure (ICH) it will herniate through the Tentoral Incisure
