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Adaptation of lift forces in object manipulation through action observation.

Reichelt, Andreas F (author)
Ash, Alyssa M (author)
Baugh, Lee A (author)
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Johansson, Roland S (author)
Umeå universitet,Fysiologi
Flanagan, J Randall (author)
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 (creator_code:org_t)
2013-05-17
2013
English.
In: Experimental Brain Research. - : Springer. - 0014-4819 .- 1432-1106. ; 228:2, s. 221-234
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The ability to predict accurately the weights of objects is essential for skilled and dexterous manipulation. A potentially important source of information about object weight is through the observation of other people lifting objects. Here, we tested the hypothesis that when watching an actor lift an object, people naturally learn the object's weight and use this information to scale forces when they subsequently lift the object themselves. Participants repeatedly lifted an object in turn with an actor. Object weight unpredictably changed between 2 and 7 N every 5th to 9th of the actor's lifts, and the weight lifted by the participant always matched that previously lifted by the actor. Even though the participants were uninformed about the structure of the experiment, they appropriately adapted their lifting force in the first trial after a weight change. Thus, participants updated their internal representation about the object's weight, for use in action, when watching a single lift performed by the actor. This ability presumably involves the comparison of predicted and actual sensory information related to actor's actions, a comparison process that is also fundamental in action.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper -- Neurovetenskaper (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Basic Medicine -- Neurosciences (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Neurologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Neurology (hsv//eng)

Keyword

Action observation
Object manipulation
Motor learning
Human

Publication and Content Type

ref (subject category)
art (subject category)

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Reichelt, Andrea ...
Ash, Alyssa M
Baugh, Lee A
Johansson, Rolan ...
Flanagan, J Rand ...
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MEDICAL AND HEALTH SCIENCES
MEDICAL AND HEAL ...
and Basic Medicine
and Neurosciences
MEDICAL AND HEALTH SCIENCES
MEDICAL AND HEAL ...
and Clinical Medicin ...
and Neurology
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Experimental Bra ...
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Umeå University

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