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Related Experiment Videos

Antisaccade deficit after anterior cingulate cortex resection.

D Milea1, S Lehéricy, S Rivaud-Péchoux

  • 1Laboratoire Physiologie de la Perception et de l'Action, Collège de France, Paris, France. dan.milea@psl.ap-hop-paris.fr

Neuroreport
|February 25, 2003
PubMed
Summary
This summary is machine-generated.

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The anterior cingulate cortex, or ACC, plays a key role in suppressing unwanted reflexive saccades. Lesion studies show damage to the posterior ACC impairs antisaccade performance, highlighting its function in voluntary fixation control.

Area of Science:

  • Neuroscience
  • Ophthalmology
  • Cognitive Science

Background:

  • Suppression of reflexive saccades is vital for maintaining voluntary fixation.
  • The dorsolateral prefrontal cortex is a primary control center, but other brain regions may contribute.
  • Understanding the neural basis of saccade inhibition is crucial for cognitive neuroscience.

Purpose of the Study:

  • To investigate the role of the anterior cingulate cortex (ACC) in inhibiting reflexive saccades.
  • To determine if frontal lobe resections impacting the ACC affect antisaccade performance.
  • To identify critical brain regions involved in saccade suppression using a lesion study approach.

Main Methods:

  • Prospective lesion study involving six patients with frontal low-grade gliomas.

Related Experiment Videos

  • Electro-oculography and the antisaccade paradigm were used to assess saccade inhibition before and after surgery.
  • Lesion mapping in Talairach space to correlate deficits with specific anatomical structures.

    • Main Results:

    • Three out of six patients exhibited significant post-operative antisaccade errors.
    • These deficits were associated with resections involving a critical region in the posterior ACC (cingulate eye field).
    • Patients with intact posterior ACC regions showed no antisaccade deficits.

    Conclusions:

    • The posterior part of the anterior cingulate cortex, functioning as the cingulate eye field, is implicated in suppressing unwanted saccades.
    • This finding suggests the ACC plays a significant role in the neural circuitry underlying voluntary fixation and cognitive control of eye movements.
    • Lesion studies provide valuable insights into the functional neuroanatomy of saccade control.