Optokinetic nystagmus in homonymous hemianopia due to a strictly occipital lesion.
Optokinetic nystagmus (OKN) was tested in 15 patients with unilateral strictly occipital brain lesions and complete homonymous hemianopia and compared with findings in a group of normal controls. Quantitative analysis of the results in the patients revealed a bilateral disorder of OKN. When the stimulus was moved in the direction opposite to the hemianopic field, there was a significant decrease in optokinetic gain, and the amplitude of nystagmus decreased. There was no correlation between OKN and size of the residual macular field.
Department of Neurology, Universitätsklinikum Rudolf Virchow, Berlin.
H W
HW
Kölmel
H J
HJ
Nabel
D006423:Hemianopsia / Q000209:etiology*; D006801:Humans; D009760:Nystagmus, Physiologic; D009778:Occipital Lobe / Q000473:pathology*; D010775:Photic Stimulation