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Related Experiment Videos

Switching from automatic to controlled action by monkey medial frontal cortex.

Masaki Isoda1, Okihide Hikosaka

  • 1Laboratory of Sensorimotor Research, National Eye Institute, National Institutes of Health, 49 Convent Drive, Bethesda, Maryland 20892, USA. isodam@nei.nih.gov

Nature Neuroscience
|January 24, 2007
PubMed
Summary

The presupplementary motor area (pre-SMA) helps switch from automatic to controlled actions. It suppresses unwanted habits and boosts desired behaviors, resolving conflict for better decision-making.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Behavioral Science

Background:

  • Human behavior relies heavily on automatic, habitual actions.
  • Environmental changes necessitate switching from automatic to volitionally controlled behaviors.
  • The neural mechanisms underlying behavioral switching remain largely unknown.

Purpose of the Study:

  • To investigate the role of the presupplementary motor area (pre-SMA) in behavioral switching.
  • To understand how the brain transitions from automatic to controlled actions.

Main Methods:

  • Electrophysiological recordings in rhesus macaque monkeys.
  • Selective neuronal activation in the pre-SMA was monitored during behavioral tasks.
  • Electrical stimulation of the pre-SMA was applied to observe its effects on behavior.

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Main Results:

  • A specific group of pre-SMA neurons showed selective activation during successful behavioral switches.
  • Electrical stimulation of the pre-SMA led to the suppression of automatic incorrect responses.
  • The pre-SMA appeared to suppress automatic actions before facilitating desired controlled actions.

Conclusions:

  • The presupplementary motor area (pre-SMA) plays a critical role in switching from automatic to volitionally controlled behavior.
  • The pre-SMA resolves response conflict by inhibiting unwanted automatic actions and promoting desired controlled actions.