English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Local field potential modulation during generalized flash suppression in the monkey

Wilke, M., Logothetis, N., & Leopold, D. (2005). Local field potential modulation during generalized flash suppression in the monkey. Poster presented at 35th Annual Meeting of the Society for Neuroscience (Neuroscience 2005), Washington, DC, USA.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Wilke, M1, Author           
Logothetis, NK1, Author           
Leopold, DA1, Author           
Affiliations:
1Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              

Content

show
hide
Free keywords: -
 Abstract: Salient visual stimuli often subjectively disappear following the abrupt onset of a spatially separated pattern (Generalized Flash Suppression, GFS). Unlike other forms of induced perceptual suppression such as monocular or binocular rivalry, the vanishing stimulus is not replaced by a competing pattern, but simply disappears and remains continuously invisible for up to several seconds. In agreement with studies measuring single cell activity during binocular rivalry (Leopold Logothetis, 1996; Gail et al., 2004), we reported previously that only a small minority of neurons in V1 showed activity changes corresponding to the subjective disappearance of a stimulus during GFS, while this fraction was slightly higher in area V4 (Wilke, 2003). In all cases, perceptual modulation was considerably smaller than in a control condition where the stimulus was physically removed. In the present study, we investigate the expression of perceptual suppression in the local field potential (LFP), comparing it to the changes in spiking activity observed at the same recording sites. Using transdural multielectrode recording techniques, we simultaneously measured spiking activity (single- and multi-unit) and local field potentials in areas V1, V2 and V4 in three monkeys reporting subjective target visibility during GFS. We found that perceptual suppression was more reliably expressed in the multiunit signal compared with single cells. In all visual areas, the magnitude of the evoked LFP response to the suppressing pattern was often correlated with the visibility. We examined band-limited power (BLP) of the local field potential, and found perception-related modulation to be variable, both in its magnitude and in the band in which it was expressed. Modulation in the gamma band (30 to 80 Hz) generally covaried with spiking activity on a trial by trial basis.

Details

show
hide
Language(s):
 Dates: 2005-11
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: URI: http://www.sfn.org/absarchive/
BibTex Citekey: WilkeLL2005
 Degree: -

Event

show
hide
Title: 35th Annual Meeting of the Society for Neuroscience (Neuroscience 2005)
Place of Event: Washington, DC, USA
Start-/End Date: -

Legal Case

show

Project information

show

Source

show