title: Interplay of orientation selectivity and the power of low- and high-gamma bands in the cat primary visual cortex.
abstract: Gamma oscillations are ubiquitous in brain and are believed to be inevitable for information processing in brain. Here, we report that distinct bands (low, 30-40Hz and high gamma, 60-80Hz) of stimulus-triggered gamma oscillations are systematically linked to the orientation selectivity index (OSI) of neurons in the cat primary visual cortex. The gamma-power is high for the highly selective neurons in the low-gamma band, whereas it is high for the broadly selective neurons in the high-gamma band. We suggest that the low-gamma band is principally implicated in feed-forward excitatory flow, whereas the high-gamma band governs the flow of this excitation.
authors.affiliation: Neurophysiology of Visual System, Université de Montréal, Département de Sciences Biologiques, Montréal, QC, Canada.
authors.forename: Vishal
authors.initials: V
authors.lastname: Bharmauria
authors.affiliation: Neurophysiology of Visual System, Université de Montréal, Département de Sciences Biologiques, Montréal, QC, Canada.
authors.forename: Lyes
authors.initials: L
authors.lastname: Bachatene
authors.affiliation: Neurophysiology of Visual System, Université de Montréal, Département de Sciences Biologiques, Montréal, QC, Canada.
authors.forename: Afef
authors.initials: A
authors.lastname: Ouelhazi
authors.affiliation: Neurophysiology of Visual System, Université de Montréal, Département de Sciences Biologiques, Montréal, QC, Canada.
authors.forename: Sarah
authors.initials: S
authors.lastname: Cattan
authors.affiliation: Neurophysiology of Visual System, Université de Montréal, Département de Sciences Biologiques, Montréal, QC, Canada.
authors.forename: Nayan
authors.initials: N
authors.lastname: Chanauria
authors.affiliation: Neurophysiology of Visual System, Université de Montréal, Département de Sciences Biologiques, Montréal, QC, Canada.
authors.forename: Faustin Armel
authors.initials: FA
authors.lastname: Etindele-Sosso
authors.affiliation: Neurophysiology of Visual System, Université de Montréal, Département de Sciences Biologiques, Montréal, QC, Canada; Département de Génie Électrique et Génie Informatique, Université de Sherbrooke, Sherbrooke, QC, Canada.
authors.forename: Jean
authors.initials: J
authors.lastname: Rouat
authors.affiliation: Neurophysiology of Visual System, Université de Montréal, Département de Sciences Biologiques, Montréal, QC, Canada; Département de Génie Électrique et Génie Informatique, Université de Sherbrooke, Sherbrooke, QC, Canada. Electronic address: stephane.molotchnikoff@umontreal.ca.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Molotchnikoff
mesh_terms: D000200:Action Potentials; D000818:Animals; D002415:Cats; D065818:Gamma Rhythm; D009474:Neurons / Q000502:physiology*; D010775:Photic Stimulation; D014793:Visual Cortex / Q000502:physiology*
keywords: Ensemble; Gamma oscillations; Orientation selectivity index; Primary visual cortex