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Related Experiment Videos

On the programming and reprogramming of actions.

Rogier B Mars1, Carinne Piekema, Michael G H Coles

  • 1F.C. Donders Centre for Cognitive Neuroimaging, Nijmegen, The Netherlands. r.mars@ucl.ac.uk

Cerebral Cortex (New York, N.Y. : 1991)
|March 29, 2007
PubMed
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Action selection is influenced by existing movement plans. New research reveals specific brain regions involved in programming, reprogramming, and executing movements, clarifying roles in response selection and inhibition.

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Motor Control

Background:

  • Action selection typically occurs within the context of ongoing movement plans.
  • Previous research often overlooks the influence of existing motor plans on action selection.
  • Studies focusing on action planning under time pressure intermingle response inhibition and selection.

Purpose of the Study:

  • To investigate how pre-existing motor plans affect brain activity during action selection.
  • To differentiate the neural processes of movement programming, reprogramming, and execution.
  • To clarify the roles of specific brain regions in response selection and inhibition.

Main Methods:

  • Utilized neuroimaging techniques to examine cerebral effects during action selection tasks.

Related Experiment Videos

  • Separated the temporal dynamics of movement programming, reprogramming, and execution.
  • Analyzed brain activity in relation to the presence or absence of prior motor plans.

    • Main Results:

    • Parietofrontal circuits, including the intraparietal sulcus and left dorsal premotor cortex, are crucial for programming motor responses, irrespective of prior plans.
    • Additional brain regions are recruited for programming responses when an existing motor program is present.
    • Right-hemisphere regions, previously linked to inhibition, are implicated in response selection.
    • A specific right precentral region plays a key role in movement reprogramming, involving inhibition of both actual and represented motor actions.

    Conclusions:

    • Movement programming relies on distinct parietofrontal networks, unaffected by prior motor plans.
    • Response selection involves right-hemisphere regions, challenging traditional views of their role in inhibition.
    • Movement reprogramming engages specific right precentral areas for inhibiting motor representations and actions.