Brain Herniation

Question 1

Subfalcine

Answer 1

1. herniation of the Cingulate Gyrus underneath fax cerebri
2. Opposite side leg weakness due to same side ACA compression
3. No pupil Changes. consciousness same

Question 2

Uncal

Answer 2

Herniation of Uncas (medial temporal lobe) under the tentorium Cerebelli

2. same side dilation of pupil (third cranial nerve)
3. early - opposite side hemiparesis same side cerebral peduncle compression

4.late same side hemiparesis
opposite side cerebral peduncle compression

Question 3

Central

Answer 3

Caudal pushing of diencephalon and brainstem

2. rupture of para median basilar artery 3. bilateral mid position fixed pupils (loss for para symp and symp supply)
3. decorticate decerbrate posturing

Question 4

Tonsillar

Answer 4

1 Herniation ofCerebellar tonsils Through foreman magnum

2. Loss of CN reflexes, flaccid paralysis stop breathing (Brain compressed)