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FEF TMS affects visual cortical activity.

Paul C J Taylor1, Anna C Nobre, Matthew F S Rushworth

  • 1Department of Experimental Psychology, University of Oxford, South Parks Road, Oxford OX1 3UD, UK. paul.taylor@psy.ox.ac.uk

Cerebral Cortex (New York, N.Y. : 1991)
|March 10, 2006
PubMed
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This summary is machine-generated.

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The human frontal eye field (FEF) causally influences visual processing in posterior brain areas during spatial attention. Transcranial magnetic stimulation (TMS) of the FEF modulated neural activity related to attention and visual stimuli.

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Human Brain Imaging

Background:

  • The frontal eye field (FEF) is implicated in attention and eye movements.
  • Its precise role in modulating visual processing during spatial attention remains under investigation.

Purpose of the Study:

  • To determine if the frontal eye field (FEF) is critical for controlling visual processing in posterior brain regions during spatial attention.
  • To investigate the causal influence of FEF activity on neural correlates of attention.

Main Methods:

  • Transcranial magnetic stimulation (TMS) applied to the right FEF during a covert attentional task.
  • Simultaneous recording of event-related potentials (ERPs) from lateral posterior electrodes.
  • Comparison of effects from FEF TMS versus a control stimulation site.

Related Experiment Videos

Main Results:

  • FEF TMS significantly altered neural activity evoked by visual stimuli and ongoing anticipatory activity.
  • Effects were observed earlier and were strongest for ipsilateral FEF TMS and contralateral stimuli.
  • TMS-induced effects on visual ERPs coincided with attention-modulated ERPs.
  • No significant effects were found with TMS of a non-connected control site.

Conclusions:

  • The human FEF exerts a causal influence on visual activity modulation in posterior areas during attentional allocation.
  • This finding supports a crucial role for FEF in the top-down control of visual perception via attention.