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Predictive control of eye movements in parkinson disease
Author(s) -
Flowers K. A.,
Downing A. C.
Publication year - 1978
Publication title -
annals of neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.764
H-Index - 296
eISSN - 1531-8249
pISSN - 0364-5134
DOI - 10.1002/ana.410040112
Subject(s) - anticipation (artificial intelligence) , electrooculography , eye movement , parkinson's disease , phase lag , eye tracking , physical medicine and rehabilitation , audiology , psychology , medicine , disease , neuroscience , computer science , artificial intelligence , mathematics
Four parkinsonian patients who had shown evidence of an impairment of predictive manual control and 4 age‐matched normal subjects were tested for the predictive control of eye movements. Subjects tracked a target with their eyes as it moved in either irregular “noise” or regular (predictable) linear ramp or sine waveforms. Eye movements were monitored by electrooculograpy, and the overall tracking time lag for each condition was determined by cross‐correlation. Both normal and parkinsonian subjects showed prediction in eye tracking on the regular waveforms (zero time lag or anticipation of the target track), indicating that (1) the parkinsonian loss of predictive control in manual tasks is not due to defective control of eye movements, and (2) there may be separate predictor mechanisms in the brain for eyes and hands.