Brain herniation Flashcards
When does brain herniation happen
when ICP > 15mmHg
what is displaced in a supratentorial herniation
cerebrum
what is displaces in an infratentorial herniation
cerebellum
describe uncal herniation
uncus of temporal lobe displaces and compresses brainstem
Which cranial nerve is compressed in uncal herniation
CN 3
describe central herniation
diencephalon slips down
What sign is seen in central herniation
sunset sign in eyes ie paralysis of upward gaze
describe cingulate herniation
cingulate gyrus slips under falx cerebri
What complication can arise from cingulate herniation
ACA compression leading to ischaemic stroke
describe transcalvarial herniation
herniation through the skull
describe tonsillar herniation
cerebellar tonsils slip through the foramen magnum and compresses the brainstem
What is the Cushing’s triad in response to
raised ICP
What are the 3 features of Cushing’s triad
hypertension
irregular breathing
bradycardia
What is absolutely contraindicated in raised ICP
lumbar puncture
