Research article summary (published 23 Mar 2008):

Predictive force programming in the grip-lift task: the role of memory links between arbitrary cues and object weight.

Full Abstract

We tested the ability of healthy participants to learn an association between arbitrary sensory cues and the weight of an object to be lifted using a precision grip between the index finger and thumb. Right-handed participants performed a series of grip-lift tasks with each hand. In a first experiment, participants lifted two objects of equal visual appearance which unexpectedly and randomly changed their weight. In two subsequent experiments, the change in object weight was indicated by cues, which were presented (i) visually or (ii) auditorily. When no cue about the weight of the object to be lifted was presented, participants programmed grip force according to the most recent lift, regardless of the hand used. In contrast, participants were able to rapidly establish an association between a particular sensory cue with a given weight and scaled grip force precisely to the actual weight thereafter, regardless of the hand used or the sensory modality of the cue. We discuss our data within the theoretical concept of internal models.

Author information

Author/s: Ameli, Mitra (M); Dafotakis, Manuel (M); Fink, Gereon R (GR); Nowak, Dennis A (DA);

Affiliation: Department of Neurology, University of Cologne, Cologne, Germany.

Journal and publication information

Publication Type: Journal Article; Randomized Controlled Trial

Journal: Neuropsychologia (Neuropsychologia), published in England. (Language: eng)

Reference: 2008-; vol 46 (issue 9) : pp 2383-8

Dates: Created 2008/06/03; Completed 2008/09/11;

PMID: 18455203, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adult Analysis of Variance Auditory Perception - physiology Cues Female Fingers - physiology Functional Laterality - physiology Hand - physiology Hand Strength - physiology Humans Lifting Male

Male Memory - physiology Middle Aged Models, Neurological Motor Skills - physiology Movement - physiology Predictive Value of Tests Time Factors Visual Perception - physiology Weight Perception - physiology Weight-Bearing - physiology Weights and Measures

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