Relative scotoma and statokinetic dissociation (Riddoch's phenomenon) from occipital lobe dysfunction.
Riddoch's phenomenon, in which a stimulus is perceived during movement but not with static presentation, has been reported for occipital lobe and anterior visual pathway disorders. To our knowledge, a threshold for movement detection in the affected hemifield has not been reported. A case of statokinetic dissociation from occipital lobe infarction is presented in which a threshold range for movement detection was identified. The possible role of separate channels in the visual cortex for analysis of kinetic and static stimuli is suggested.
Finkelstein
J I
JI
Johnson
L N
LN
D002544:Cerebral Infarction / Q000150:complications*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009039:Motion Perception; D009778:Occipital Lobe / Q000098:blood supply*; D012607:Scotoma / Q000209:etiology*; D012684:Sensory Thresholds; D058609:Visual Field Tests