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Memory mechanisms in grasping.
Neuropsychologia. 2009 May; 47(6):1532-45.N

Abstract

The availability of visual information influences the execution of goal-directed movements. This is very prominent in memory conditions, where a delay is introduced between stimulus presentation and execution of the movement. The corresponding effects could be due to a decay of the visual information or to different processing mechanisms used for movements directed at visible (dorsal stream) and remembered (ventral stream) objects as proposed by the two visual systems hypothesis. In three experiments, the authors investigated grasping under full vision and three different delay conditions with increasing memory demands. Results indicate that the visuomotor information used for grasping decays rapidly. No evidence was found for qualitative changes in movement kinematics and the use of different representations for visually guided and memory guided movements. Findings rather suggest that delayed grasping is similar to grasping directed to larger objects under full vision. Therefore, the authors propose that grasping after a delay is guided by classic memory mechanisms and that this is reflected in an increasing maximum grip aperture in grasping.

Authors+Show Affiliations

Experimental Psychology, University of Giessen, Germany. constanze.hesse@psy.lmu.deNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18775734

Citation

Hesse, Constanze, and Volker H. Franz. "Memory Mechanisms in Grasping." Neuropsychologia, vol. 47, no. 6, 2009, pp. 1532-45.
Hesse C, Franz VH. Memory mechanisms in grasping. Neuropsychologia. 2009;47(6):1532-45.
Hesse, C., & Franz, V. H. (2009). Memory mechanisms in grasping. Neuropsychologia, 47(6), 1532-45. https://doi.org/10.1016/j.neuropsychologia.2008.08.012
Hesse C, Franz VH. Memory Mechanisms in Grasping. Neuropsychologia. 2009;47(6):1532-45. PubMed PMID: 18775734.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Memory mechanisms in grasping. AU - Hesse,Constanze, AU - Franz,Volker H, Y1 - 2008/08/19/ PY - 2008/03/04/received PY - 2008/06/24/revised PY - 2008/08/09/accepted PY - 2008/9/9/pubmed PY - 2009/7/31/medline PY - 2008/9/9/entrez SP - 1532 EP - 45 JF - Neuropsychologia JO - Neuropsychologia VL - 47 IS - 6 N2 - The availability of visual information influences the execution of goal-directed movements. This is very prominent in memory conditions, where a delay is introduced between stimulus presentation and execution of the movement. The corresponding effects could be due to a decay of the visual information or to different processing mechanisms used for movements directed at visible (dorsal stream) and remembered (ventral stream) objects as proposed by the two visual systems hypothesis. In three experiments, the authors investigated grasping under full vision and three different delay conditions with increasing memory demands. Results indicate that the visuomotor information used for grasping decays rapidly. No evidence was found for qualitative changes in movement kinematics and the use of different representations for visually guided and memory guided movements. Findings rather suggest that delayed grasping is similar to grasping directed to larger objects under full vision. Therefore, the authors propose that grasping after a delay is guided by classic memory mechanisms and that this is reflected in an increasing maximum grip aperture in grasping. SN - 1873-3514 UR - https://www.unboundmedicine.com/medline/citation/18775734/Memory_mechanisms_in_grasping_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0028-3932(08)00337-0 DB - PRIME DP - Unbound Medicine ER -