Anatomy of SOL Flashcards
What are the 5 layers of the scalp?
skin
connective tissue
loose connective tissue
pericranium
What artery crosses over the deep aspect of the pterion?
middle meningeal artery
What is the sensory nerve supply of dura mater?
mainly CNV
What is the function of arachnoid granulations?
reabsorb CSF
What is the tentorium cerebelli?
tough sheet of dura mater tenting over the cerebellum
What does tentorium cerebelli attach to?
ridges of the petrous temporal bones
What is the diaphragm sellae?
tough sheet of dura mater over the pituitary fossa
What does falx cerebri separate?
the right and left cerebral hemispheres
What are the attachments of falx cerebri?
crista galli; internal aspect of the sagittal suture; internal occipital protuberance posteriorly
What is the function of the cerebral veins?
drain venous blood from the brain into dural venous sinuses
What does the sigmoid sinus drain into?
IJV
Where does the sigmoid sinus drain into the IJV?
jugular foramen
Where is the confluence of the sinuses?
midline at the internal occipital protruberance
How do the vertebral arteries reach the cranial cavity?
pass through transverse foraminae then through foramen magnum
How does the internal carotid artery reach the brain?
travels in carotid sheath then carotid canal
Which artery supplies the medial aspect of the cerebral hemispheres?
anterior cerebral arteries
What important area does the posterior cerebral artery supply?
visual cortex
Which arteries supply the lateral aspects of the cerebral hemispheres?
middle cerebral arteries
What space are the arteries supplying the brain found within?
subarachnoid space
Where does the subarachnoid space end inferiorly?
level of S2
What secretes CSF?
secreted by the choroid plexus
Where is the choroid plexus located?
lateral and third ventricles
What are the arachnoid granulations?
herniations of arachnoid mater that protrude into the dural venous sinuses
Where is an extradural haemorrhage located?
between the bone and the dura
What causes an extradural haemorrhage?
ruptured middle meningeal a. from trauma to the pterion
What causes a subdural haemorrhage?
torn cerebral veins (falls)
What happens in a subdural haemorrhage?
dura and arachnoid are separated
What causes a subarachnoid haemorrhage?
ruptured berry aneurysm
