Abstract
Detailed characteristics of saccadic eye movements in 14 Parkinsonian patients were compared with those in 12 age-matched controls. The subjects were required to follow the sudden, randomly timed, stepwise change in position of a visual fixation point through 25°. Eye movements were recorded by d-c electrooculography. The following characteristics of individual saccades were measured: amplitude, duration, maximum velocity, times to accelerate to and decelerate from maximum velocity, duration between successive corrective saccades, latency of response. The results showed that the patients had an abnormal tendency to make small saccades followed by one or more corrections, but that all the other measured characteristics were essentially normal. It is inferred that in these patients the peripheral oculomotor system examined was functionally normal and the centrally coordinated neural programs controlling the observed movements were normal for the amplitudes of saccades achieved.
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