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Visual Effects on Finger Tremor in Normal Subjects and Anxious Patients

Published online by Cambridge University Press:  29 January 2018

J. R. G. Carrie
J. R. G. Carrie*
Affiliation:
Lecturer, Institute of Psychiatry, Maudsley Hospital, Denmark Hill, London, S.E.5
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Extract

Sutton and Sykes (1956) studied the characteristics of the tremor superimposed on a voluntary muscular contraction under two conditions; (a) when the subjects were provided with a visual display of the accuracy with which they were maintaining a constant force, and (b) when they carried out the same task with the eyes closed. It was observed that when the subjects' eyes were closed, the tremor amplitude at 8–9 c/s (cycles per second) was sometimes relatively much diminished. In some subjects there was evidence of a smaller reduction in amplitude at other frequencies. Young (1933) had made similar findings using a less satisfactory technique. The findings of these workers have been confirmed and extended in another investigation (Carrie, 1965).

Type
Research Article
Information
The British Journal of Psychiatry , Volume 111 , Issue 481 , December 1965 , pp. 1181 - 1184
Copyright
Copyright © Royal College of Psychiatrists, 1965 

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References

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