Document Detail

Differential thresholds for limb movement measured using adaptive techniques.
MedLine Citation:
PMID:  1437485     Owner:  NLM     Status:  MEDLINE    
Differential thresholds for limb movement were measured in 10 subjects, using the transformed up-down procedure. Subjects were required to indicate which of two random displacement perturbations delivered to their forearms had the larger standard deviation (SD). The SD of the reference signal was fixed for each experimental condition at one of seven values ranging from 0.05 to 3.2 mm. THe SD of the other signal varied depending on the subject's response. Using this procedure, the differential threshold for limb movement was calculated to be 8%, which is very similar to the thresholds estimated previously for changes in limb position (9%) and force (7%). The sensitivity of the human proprioceptive system to changes in limb displacement was much greater than anticipated, with subjects being able to resolve a 5-microns difference between two perturbations delivered to their arms.
L A Jones; I W Hunter; R J Irwin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Perception & psychophysics     Volume:  52     ISSN:  0031-5117     ISO Abbreviation:  Percept Psychophys     Publication Date:  1992 Nov 
Date Detail:
Created Date:  1992-12-17     Completed Date:  1992-12-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0200445     Medline TA:  Percept Psychophys     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  529-35     Citation Subset:  C    
McGill University, Montreal, Quebec, Canada.
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MeSH Terms
Differential Threshold
Normal Distribution
Reference Values

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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