Attention differentially modulates the amplitude of resonance frequencies in the visual cortex

Publication date: December 2019Source: NeuroImage, Volume 203Author(s): Rasa Gulbinaite, Diane H.M. Roozendaal, Rufin VanRullenAbstractRhythmic visual stimuli (flicker) elicit rhythmic brain responses at the frequency of the stimulus, and attention generally enhances these oscillatory brain responses (steady state visual evoked potentials, SSVEPs). Although SSVEP responses have been tested for flicker frequencies up to 100 Hz [Herrmann, 2001], effects of attention on SSVEP amplitude have only been reported for lower frequencies (up to ~30 Hz), with no systematic comparison across a wide, finely sampled frequency range. Does attention modulate SSVEP amplitude at higher flicker frequencies (gamma band, 30–80 Hz), and is attentional modulation constant across frequencies? By isolating SSVEP responses from the broadband EEG signal using a multivariate spatiotemporal source separation method, we demonstrate that flicker in the alpha and gamma bands elicit strongest and maximally phase stable brain responses (resonance), on which the effect of attention is opposite: positive for gamma and negative for alpha. Finding subject-specific gamma resonance frequency and a positive attentional modulation of gamma-band SSVEPs points to the untapped potential of flicker as a non-invasive tool for studying the causal effects of interactions between visual gamma-band rhythmic stimuli and endogenous gamma oscillations on perception and attention.
Source: NeuroImage - Category: Neuroscience Source Type: research

Related Links:

Publication date: September 2019Source: Sports Orthopaedics and Traumatology, Volume 35, Issue 3Author(s):
Source: Sports Orthopaedics and Traumatology - Category: Sports Medicine Source Type: research
Publication date: September 2019Source: Sports Orthopaedics and Traumatology, Volume 35, Issue 3Author(s):
Source: Sports Orthopaedics and Traumatology - Category: Sports Medicine Source Type: research
Publication date: September 2019Source: Sports Orthopaedics and Traumatology, Volume 35, Issue 3Author(s):
Source: Sports Orthopaedics and Traumatology - Category: Sports Medicine Source Type: research
Publication date: September 2019Source: Sports Orthopaedics and Traumatology, Volume 35, Issue 3Author(s):
Source: Sports Orthopaedics and Traumatology - Category: Sports Medicine Source Type: research
Publication date: September 2019Source: Sports Orthopaedics and Traumatology, Volume 35, Issue 3Author(s):
Source: Sports Orthopaedics and Traumatology - Category: Sports Medicine Source Type: research
Publication date: September 2019Source: Sports Orthopaedics and Traumatology, Volume 35, Issue 3Author(s): B. Drews, G. Bauer
Source: Sports Orthopaedics and Traumatology - Category: Sports Medicine Source Type: research
Publication date: September 2019Source: Sports Orthopaedics and Traumatology, Volume 35, Issue 3Author(s):
Source: Sports Orthopaedics and Traumatology - Category: Sports Medicine Source Type: research
Publication date: Available online 18 October 2019Source: Journal of Science and Medicine in SportAuthor(s): Cailbhe Doherty, Alison Keogh, James Davenport, Aonghus Lawlor, Barry Smyth, Brian CaulfieldAbstractObjectiveMarathoners rely on expert-opinion and the anecdotal advice of their peers when devising their training plans for an upcoming race. The accumulation of results from multiple scientific studies has the potential to clarify the precise training requirements for the marathon. The purpose of the present study was to perform a systematic review, meta-regression and meta-analysis of available literature to determin...
Source: Journal of Science and Medicine in Sport - Category: Sports Medicine Source Type: research
Publication date: Available online 17 October 2019Source: The Lancet Respiratory MedicineAuthor(s): The Lancet Respiratory Medicine
Source: The Lancet Respiratory Medicine - Category: Respiratory Medicine Source Type: research
Publication date: Available online 17 October 2019Source: The Lancet Respiratory MedicineAuthor(s): Eric D McCollum, Carina King, Tim Colbourn, Hamish Graham, Mike Bernstein, Iain H Wilson, William Checkley
Source: The Lancet Respiratory Medicine - Category: Respiratory Medicine Source Type: research
More News: Brain | Neurology | Neuroscience