Wednesday 27 July 2016

Features of tentorial herniation | Crack PGIMER NOV 2016


Features of tentorial herniation include:

A. Vomiting
B. Deterioration of consciousness
C. Dilated pupil
D. Impaired respiration
E. Hemiparesis


The Answer is. A,B,C,D,E.

Tentorial herniation:
• Occurs when a mass lesion makes one cerebralhemisphere too large for its compartment and cause theinfero-medial part of the cerebral hemisphere to bepushed through the tentorial hiatus (which separates thecerebrum from the cerebellum)
• The increased pressure causes vomiting
• Deterioration of consciousness occurs due todisturbance of the reticular formation
• Compression on the third nerve results in dilated pupil,ocular alsy and ptosis

• Results in coning with the whole brainstem beingpushed downward. This interfere with the vital functionsof respiration (controlled by medulla oblongata)compression of the pyramidal fibres result in hemiparesis