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Related Experiment Videos

Intratask and intertask asymmetry analysis of motor function.

Lirong Yan1, Daxing Wu, Xiang Wang

  • 1College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, PR China.

Neuroreport
|July 14, 2006
PubMed
Summary

This study reveals brain functional asymmetries during finger-to-thumb tasks. Distinct brain regions, including the basal ganglia, show lateralization differences between left and right hand movements.

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Area of Science:

  • Neuroscience
  • Motor Control
  • Brain Imaging

Background:

  • Functional magnetic resonance imaging (fMRI) studies show functional brain asymmetries in motor cortex and cerebellum for finger-to-thumb tasks (intratask).
  • However, brain asymmetries across different hand performances (intertask) for this task are less understood.

Purpose of the Study:

  • To investigate functional brain asymmetries during intratask finger-to-thumb movements.
  • To explore intertask differences in brain lateralization between left and right hand performances of the finger-to-thumb task.

Main Methods:

  • Utilized functional magnetic resonance imaging (fMRI) to observe brain activity.
  • Compared brain activation patterns during unilateral (intratask) and bilateral (intertask) finger-to-thumb movements.

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Main Results:

  • Intratask finger-to-thumb movements evoked asymmetry responses in the motor cortex, cerebellum, extra-nuclear regions, and insula.
  • Intertask comparisons revealed distinct lateralization in the temporal cortex, extra-nuclear regions, parahippocampal gyrus, cingulate gyrus, and basal ganglia.

Conclusions:

  • Motor organization involves multiple aspects of functional asymmetries.
  • Specific brain regions, notably the basal ganglia, play a prominent role in hand-specific motor lateralization.