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Related Experiment Video

Updated: May 22, 2026

Group Synchronization During Collaborative Drawing Using Functional Near-Infrared Spectroscopy
07:53

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Asymmetrical drawing patterns on the temples by left-handers.

Kazuo Mori1

  • 1Tokyo University of Agriculture and Technology, Koganei, Tokyo, Japan. kaz-mori@cc.tuat.ac.jp

Perceptual and Motor Skills
|May 16, 2012
PubMed
Summary

Genuine left-handers exhibit distinct temple-drawing asymmetries compared to right-handers. This handedness-related difference in motor execution was observed when drawing the letter S on facial areas.

Area of Science:

  • Neuroscience
  • Human motor control
  • Cerebral lateralization

Background:

  • Cerebral lateralization influences motor control and cognitive functions.
  • Previous research indicated handedness-related asymmetries in drawing tasks.

Purpose of the Study:

  • To investigate motor execution asymmetries in genuine left-handers.
  • To compare the drawing patterns of left-handers with known patterns of right-handers.

Main Methods:

  • Twenty-three Japanese left-handers were assessed using the Laterality Quotient scale.
  • Participants drew the letter S on their temples and foreheads.
  • Drawing patterns were analyzed for asymmetries and mirror reversals.

Main Results:

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  • Left-handers showed significant asymmetry when drawing on temples, mirroring right-hander patterns.
  • Left-handers predominantly drew a reversed 'S' on their right temple.
  • Forehead drawing patterns were similar across both left- and right-handers, irrespective of handedness.

    • Conclusions:

    • Motor execution on the temples demonstrates significant handedness-related asymmetry.
    • Temple-based motor tasks may reveal lateralized brain functions differently than forehead tasks.
    • Findings contribute to understanding the neural basis of handedness and motor control.