Left hand, but not right hand, reaching is sensitive to visual context

Jos J. Adam*, Rick Muskens, Susan Hoonhorst, Jay Pratt, Martin H. Fischer

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Recently, it has been reported that grasping with the left hand is more vulnerable to visual size illusions than grasping with the right hand. The present study investigated whether this increased sensitivity of the left hand for visual context extends to reaching. Left- and right-handed participants reached for targets embedded in two different visual contexts with either left or right hands. Visual context was manipulated by presenting targets either in a blank field or within an array of placeholders marking possible target locations. Regardless of handedness, the presence of placeholders affected left hand, but not right hand, reaching by improving end-point accuracy and reducing movement speed. Furthermore, left hand reaching was more accurate for far than near targets, whereas right hand reaching showed the opposite pattern. We discuss two possible hemispheric lateralization accounts of these findings.
Original languageEnglish
Pages (from-to)227-232
JournalExperimental Brain Research
Volume203
Issue number1
DOIs
Publication statusPublished - May 2010

Keywords

  • Laterality
  • Handedness
  • Dominance
  • Reaching
  • Motor control

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