Such deficits, called false localizing signs, include the following: Unilateral or bilateral lateral rectus palsy (with paresis of eye abduction) due to increased intracranial pressure compressing the 6th cranial nerve Ipsilateral hemiplegia due to compression of the contralateral cerebral peduncle against the tentorium (Kernohan notch) Ipsilateral visual field defect due to ischemia in the contralateral occipital lobe Generalized seizures may occur, more often with primary than metastatic brain tumors.