Brain herniations

Shift causes compression of the oculomotor nerve, or cranial nerve 3, evidenced by the classic sign of a unilaterally dilated pupil.

Lateral shift of brain tissue, usually result of a lesion in one the cerebral hemispheres.

Downward shift of one or both cerebral hemispheres, usually because of lesions in the frontal or parietal lobes. manifested by Cheyne-stokes respirations, pinpoint and non-reactive pupils and potential for hemodynamic instability.

Downward shift of brain tissue through the foramen magnum, which results in compression of the medulla and upper cervical