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Articles, Behavioral/Cognitive

Single-Trial Decoding of Visual Attention from Local Field Potentials in the Primate Lateral Prefrontal Cortex Is Frequency-Dependent

Sébastien Tremblay, Guillaume Doucet, Florian Pieper, Adam Sachs and Julio Martinez-Trujillo
Journal of Neuroscience 17 June 2015, 35 (24) 9038-9049; DOI: https://doi.org/10.1523/JNEUROSCI.1041-15.2015
Sébastien Tremblay
1Cognitive Neurophysiology Laboratory, Department of Physiology, McGill University, Montreal, Quebec, QC H3G 1Y6, Canada,
2Integrated Program in Neuroscience, Montreal Neurological Institute, McGill University, Montreal, Quebec, QC H3A 2B4, Canada,
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Guillaume Doucet
1Cognitive Neurophysiology Laboratory, Department of Physiology, McGill University, Montreal, Quebec, QC H3G 1Y6, Canada,
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Florian Pieper
3Institute for Neuro- & Pathophysiology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany,
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Adam Sachs
4Division of Neurosurgery, Department of Surgery, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, ON K1Y 4E9, Canada, and
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Julio Martinez-Trujillo
1Cognitive Neurophysiology Laboratory, Department of Physiology, McGill University, Montreal, Quebec, QC H3G 1Y6, Canada,
5Robarts Research Institute, Departments of Psychiatry, Physiology and Pharmacology, University of Western Ontario, London, Ontario, ON N6A 5C1, Canada
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Abstract

Local field potentials (LFPs) are fluctuations of extracellular voltage that may reflect the physiological phenomena occurring within a volume of neural tissue. It is known that the allocation of spatial attention modulates the amplitude of LFPs in visual areas of primates. An issue that remains poorly investigated is whether and how attention modulates LFPs in executive brain areas, such as the lateral prefrontal cortex (LPFC), thought to be involved in the origins of attention. We addressed this issue by recording LFPs from multielectrode arrays implanted in the LPFC of two macaques. We found that the allocation of attention can be reliably decoded on a single-trial basis from ensembles of LFPs with frequencies >60 Hz. Using LFP frequencies <60 Hz, we could not decode the allocation of attention, but we could decode the location of a visual stimulus as well as the endpoint of saccades toward that stimulus. The information contained in the high-frequency LFPs was fully redundant with the information contained in the spiking activity of single neurons recorded from the same electrodes. Moreover, the decoding of attention using γ frequency LFPs was less accurate than using spikes, but it was twice more stable across time. Finally, decorrelating the LFP signals from the different electrodes increased decoding performance in the high frequencies by up to ∼14%. Our findings suggest that LFPs recorded from chronically implanted multielectrode arrays in the LPFC contain information about sensory, cognitive, and motor components of a task in a frequency-dependent manner.

  • attention
  • decoding
  • local field potentials
  • multielectrode array
  • prefrontal cortex
  • primate
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The Journal of Neuroscience: 35 (24)
Journal of Neuroscience
Vol. 35, Issue 24
17 Jun 2015
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Single-Trial Decoding of Visual Attention from Local Field Potentials in the Primate Lateral Prefrontal Cortex Is Frequency-Dependent
Sébastien Tremblay, Guillaume Doucet, Florian Pieper, Adam Sachs, Julio Martinez-Trujillo
Journal of Neuroscience 17 June 2015, 35 (24) 9038-9049; DOI: 10.1523/JNEUROSCI.1041-15.2015

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Single-Trial Decoding of Visual Attention from Local Field Potentials in the Primate Lateral Prefrontal Cortex Is Frequency-Dependent
Sébastien Tremblay, Guillaume Doucet, Florian Pieper, Adam Sachs, Julio Martinez-Trujillo
Journal of Neuroscience 17 June 2015, 35 (24) 9038-9049; DOI: 10.1523/JNEUROSCI.1041-15.2015
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Keywords

  • attention
  • decoding
  • local field potentials
  • multielectrode array
  • prefrontal cortex
  • primate

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