[Vertigo and vertebral artery stenosis (author's transl)].

Forty nine elderly patients with osteochondrosis of the cervical spine and on whom carotid angiography had been performed were divided into two groups. In one 36 patients had vestibular symptoms whereas the other group of remaining patients was free of such symptoms. Comparison of both groups showed that vertigo (20 patients), other vestibular symptoms or nystagmus were not solely related to vertebral artery stenosis.

Single motor unit activity in extraocular muscles in man during fixation and saccades.

Extraocular motor unit activity was recorded electromyographically from the lateral and medial rectus muscles in eight normal subjects, together with their EOGs. Twelve motor units showed a discharge pattern characterized by regular firing during positions of fixation, a burst of saccadic "on" activity and complete silence during saccades in the "off" direction. Two other units seemed to be phasic or predominantly phasic.