Overview of Skull and Meninges Flashcards
Falx cerebri
CT layer that separates the 2 hemispheres
Tentorium cerebelli
CT layer that separates the cerebellum from the cortex
What does the external carotid supply?
Everything outside the skull
Middle meningeal artery
What does the internal carotid supply?
Everything inside the skull
Where do the vertebral arteries branch from?
Subclavian arteries
5 layers of the scalp
Skin Connective tissue Aponeurotic layer Loose CT Periosteum
Where are the neurovascular structures found in the scalp?
The dense CT layer
Periosteum
Last layer of the scalp
Stays attached to the bone
Osteogenic (bone forming)
What is the “danger area”
The loose CT layer of the scalp
Where scalping injuries occur
Spread of infection and hemorrhage
The neurovascular structures of the scalp are getting ripped off
The skull bone consists of what 3 parts?
Outer table (dense) Diploe (medullary bone) Inner table (dense)
What are the 2 layers of the dura?
Periosteal layer
Meningeal layer
Where are the venous sinuses found?
Between the periosteal and meningeal layers of the dura
Middle meningeal artery
Branch of external carotid artery
Found in the bone forming layer of the skull
If you damage it, blood will collect between the dura and bone, resulting in an epidural hematoma
What vessels are ruptured to get a
1. Epidural
2. Subdural
hematoma?
- Middle meningeal artery
2. Bridging veins
Emissary veins
Connect intercranial and extracranial veins
No valves
Infection can spread :(