Recognition of hand shape drawings on vertical and horizontal display

Document Type: 
Article
Article Type: 
Experimental
Disciplines: 
Artificial intelligence
Topics: 
Cognition
Keywords: 
handedness recognition, motor imagery, manual reaction time, visual representations, sensorimotor representations
Deposited by: 
Luiz G Gawryszewski
Contact email: 
gawryszewski_lg@yahoo.com.br
Date of Issue: 
2008
Authors: 
Lameira, Allan P and Guimarães-Silva, Sabrina and Werneck-Galvão, Cinthya and Pereira Junior, Antonio and Gawryszewski, Luiz G.
Journal/Publication Title: 
Psychology & Neuroscience
Volume: 
1
Issue Number: 
1
Page Range: 
35 - 40
Number of Pages: 
6
Publisher: 
J. Landeira-Fernandez, A. Pedro M. Cruz & Dora Fix Ventura
Place of Publication: 
Rio de Janeiro
ID number: 
DOI:10.3922/j.psns.2008.1.00
Official URL: 
http://www.psycneuro.org/index.php/psycneuro/article/view/31/57
Publish status: 
Published
Abstract: 

 

The visual recognition of body parts activates somato-motor representations in the brain. In the present study, we investigate the influence

of the plane in which hand drawings are displayed (Vertical or Horizontal) on mental rotations evoked by a handedness recognition task.

Sixteen right-handed volunteers participated in an experiment where the task was to evaluate the handedness of drawings of the human

hand presented in different perspectives and orientations while the Manual Reaction Time (MRT) was measured. For eight volunteers,

the hand drawings were displayed on a vertical screen monitor, while for the remainder a mirror was employed and the same drawings

appeared on the horizontal plan. Our main finding was that there are no differences in MRTs among the drawings displayed vertically

or horizontally, with some exceptions. However, the MRTs were longer when the hands in the drawings assumed configurations that

were more awkward to perform using real movements. These results show that the implicit movements involved with handedness

recognition are mainly dependent on biomechanical constraints for distal (hand), but not proximal (shoulder) movements. 

 

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