Brain Herniations

Question 1

Describe subfalcine herniation.

Answer 1

Part of brain goes under falx cerebri

Results in sensation loss or weakness on opposite side

Question 2

Describe tentorial (central) hernation.

Answer 2

Medial aspect of temporal lobe goes under tentorium cerebelli
Affects CN III

Question 3

Describe tonsillar (cerebellar) herniation.

Answer 3

Cerebellar tonsils herniate through the foramen magnum

Compresses the brainstem against the clivus causing problems with respiratory and cardiac centres.

Question 4

Describe transcalvarial herniation

Answer 4

Swollen brain herniates through defect in skull and dura when present