Conjugate Deviation of the Head and Eyes: Its Value in the Diagnosis and Localization of Abscess of the Brain

The role of the flocculus of the monkey in fixation and smooth pursuit eye movements.

“…This would imply that the flocculus exerts a continuous inhibitory effect upon supranuclear oculomotor centres during fixation. Oculomotor symptoms in patients with an acute lesion of a cerebellar hemisphere include conjugate ocular deviation towards the opposite side and gaze nystagmus towards the side of the lesion (Meyers, 1931;Fisher, Picard, Polak, Dalal & Ojeman, 1965;Nashold & Slaughter, 1969;Dichgans & Jung, 1974). Although involvement of brain-stem lesions cannot be excluded in these clinical cases, the assumption of a cerebellar origin of the oculomotor symptoms has been supported by leasion experiments in animals.…”

“…The cerebellum appears to be essential for steady fixation and smooth ocular pursuit, since impairments of gaze holding and abnormal pursuit eye movements are known to occur in patients with unilateral cerebellar lesions (Holmes, 1917;Meyers, 1931;Jung & Kornhuber, 1964;Dichgans & Jung, 1974). In hemi-cerebellectomized monkeys, Westheimer & Blair (1973) observed that ocular tracking was practically absent when the animal faced a sinusoidally moving target.…”

Eye position signals in the flocculus of the monkey during smooth‐pursuit eye movements

“…The flocculus appears to be essential for steady fixation and smooth pursuit, because impairments of gaze holding and abnormal eye movements are known to occur in patients with unilateral cerebellar lesions (Holmes, 1917;Meyers, 1931;Jung & Kornhuber, 1964;Dichgans & Jung, 1975). The possibility of cerebellar involvement in stabilizing eye positions has been suggested also by ablation studies in the cat (Carpenter, 1972;Robinson, 1974).…”