Age-related changes in smooth pursuit initiation
نویسندگان
چکیده
منابع مشابه
Reward action in the initiation of smooth pursuit eye movements.
Reward has a powerful influence on motor behavior. To probe how and where reward systems alter motor behavior, we studied smooth pursuit eye movements in monkeys trained to associate the color of a visual cue with the size of the reward to be issued at the end of the target motion. When the tracking task presented two different colored targets that moved orthogonally, monkeys biased the initiat...
متن کاملThe Initiation of Smooth Pursuit is Delayed in Anisometropic Amblyopia
PURPOSE Several behavioral studies have shown that the reaction times of visually guided movements are slower in people with amblyopia, particularly during amblyopic eye viewing. Here, we tested the hypothesis that the initiation of smooth pursuit eye movements, which are responsible for accurately keeping moving objects on the fovea, is delayed in people with anisometropic amblyopia. METHODS...
متن کاملModification of smooth pursuit initiation by target contrast
It has been demonstrated that in gap pursuit tasks, smooth pursuit latency is reduced. This 'gap effect' is modified by factors such as gap duration and task context. We have now investigated whether it is also modified by an important visual parameter--the contrast of the pursuit and fixation targets. We found that while pursuit target contrast is an important determinant of pursuit latency, f...
متن کاملContrast sensitivity during the initiation of smooth pursuit eye movements
Eye movements challenge the perception of a stable world by inducing retinal image displacement. During saccadic eye movements visual stability is accompanied by a remapping of visual receptive fields, a compression of visual space and perceptual suppression. Here we explore whether a similar suppression changes the perception of briefly presented low contrast targets during the initiation of s...
متن کاملRole of anticipation in schizophrenia-related pursuit initiation deficits.
Schizophrenia patients exhibit several smooth pursuit abnormalities including poor pursuit initiation. Velocity discrimination is also impaired and is correlated with pursuit initiation performance-suggesting that pursuit deficits are related to impairments in processing velocity information. Studies suggest that pursuit initiation is influenced by prior target motion information and/or expecta...
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ژورنال
عنوان ژورنال: Experimental Brain Research
سال: 2005
ISSN: 0014-4819,1432-1106
DOI: 10.1007/s00221-005-2265-2