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Smooth pursuit eye movements made in response to 5 and 20% targets were studied in young and old subjects. Tracking of a target was carried out both with no competing stimuli and while auditory and visual distractions were presented. Only tracking the target against a projected background significantly impaired pursuit. It did so in both age groups, by reducing pursuit gain and also by eliciting 'anticipatory saccades', which took the eyes ahead of the target to a new fixation point for 0.5 s or longer. Elderly subjects showed a significantly greater number of such interruptions, however, suggesting that continuous performance of the tracking task could be more readily disrupted in this group. These findings may arise from changes in the way in which elderly individuals process incoming sensory information.
S R Kaufman, and
L A Abel
August 1999,
Biological psychiatry,
S R Kaufman, and
L A Abel
February 1980,
Perceptual and motor skills,
S R Kaufman, and
L A Abel
January 1990,
Experimental brain research,
S R Kaufman, and
L A Abel
April 1973,
Journal of comparative and physiological psychology,
S R Kaufman, and
L A Abel
January 1996,
Acta oto-laryngologica. Supplementum,
S R Kaufman, and
L A Abel
January 1988,
Advances in oto-rhino-laryngology,
S R Kaufman, and
L A Abel
August 2013,
Experimental brain research,
S R Kaufman, and
L A Abel
February 1988,
Aviation, space, and environmental medicine,
S R Kaufman, and
L A Abel
August 1991,
The American journal of psychiatry,
S R Kaufman, and
L A Abel
October 1990,
Biological psychiatry,
