20 Intracranial Bleeding
ICP
Causes

Symptoms


HTN and ICP increase


lesion above red nucleus: decorticate
lesion below red nucleus: decerebrate
GCS

Herniation


Subfalcine: 3, cingulate gyrus goes under false cerebri
Uncal: 1, medial temporal lobe uncus goes down
Central: 2, diencephalon goes down against midbrain
Tonsillar: 5
Subfalcine

left lesion, left side knocked out, right leg paresis
Uncal

tentorium: dura matter above cerebellum

can get false localizing sign, opposide side compression

Transtentorial

uncal one subtype of transtentorial
central: 2, thalamus/hypothalamus/etc all herniates
Tonsilar

usually fatal
Bleeding


Epidural

arterial bleed


3rd branch is middle meningeal

skull fracture

lucid interval: severe, knocked out, then conscious again
Subdural



SAH


very suddenly

Hemorrhagic


ischemic stroke sites different from intraparenchymal bleeding. Most common ischemic is MCA

putamen stroke affects IC, thalamus, FEF
Charcot-Bouchard

Cerebral Amyloid Angiopathy

IVH


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