title: Intersensory selective attention and temporal orienting operate in parallel and are instantiated in spatially distinct sensory and motor cortices.
abstract: Knowledge about the sensory modality in which a forthcoming event might occur permits anticipatory intersensory attention. Information as to when exactly an event occurs enables temporal orienting. Intersensory and temporal attention mechanisms are often deployed simultaneously, but as yet it is unknown whether these processes operate interactively or in parallel. In this human electroencephalography study, we manipulated intersensory attention and temporal orienting in the same paradigm. A continuous stream of bisensory visuo-tactile inputs was presented, and a preceding auditory cue indicated to which modality participants should attend (visual or tactile). Temporal orienting was manipulated blockwise by presenting stimuli either at regular or irregular intervals. Using linear beamforming, we examined neural oscillations at virtual channels in sensory and motor cortices. Both attentional processes simultaneously modulated the power of anticipatory delta- and beta-band oscillations, as well as delta-band phase coherence. Modulations in sensory cortices reflected intersensory attention, indicative of modality-specific gating mechanisms. Modulations in motor and partly in somatosensory cortex reflected temporal orienting, indicative of a supramodal preparatory mechanism. We found no evidence for interactions between intersensory attention and temporal orienting, suggesting that these two mechanisms act in parallel and largely independent of each other in sensory and motor cortices.
authors.affiliation: Department of Psychiatry and Psychotherapy, St. Hedwig Hospital, Charité-Universitätsmedizin Berlin, Große Hamburger Str. 5-11, 10115, Berlin, Germany.|UCL, Ear Institute, 332 Gray's Inn Road, London, WC1X 8EE, UK.
authors.forename: Ulrich
authors.initials: U
authors.lastname: Pomper
authors.affiliation: Department of Psychiatry and Psychotherapy, St. Hedwig Hospital, Charité-Universitätsmedizin Berlin, Große Hamburger Str. 5-11, 10115, Berlin, Germany.
authors.forename: Julian
authors.initials: J
authors.lastname: Keil
authors.affiliation: The Sheryl and Daniel R. Tishman Cognitive Neurophysiology Laboratory, Children's Evaluation and Rehabilitation Center (CERC), Departments of Pediatrics & Neuroscience, Albert Einstein College of Medicine & Montefiore Medical Center, Van Etten Building - Wing 1C, 1225 Morris Park Avenue, Bronx, NY, 10461, USA.
authors.forename: John J
authors.initials: JJ
authors.lastname: Foxe
authors.affiliation: Department of Psychiatry and Psychotherapy, St. Hedwig Hospital, Charité-Universitätsmedizin Berlin, Große Hamburger Str. 5-11, 10115, Berlin, Germany.
authors.forename: Daniel
authors.initials: D
authors.lastname: Senkowski
mesh_terms: D000513:Alpha Rhythm; D001288:Attention / Q000502:physiology*; D001307:Auditory Perception / Q000502:physiology; D001611:Beta Rhythm; D001931:Brain Mapping; D003463:Cues; D003700:Delta Rhythm; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008297:Male; D009044:Motor Cortex / Q000502:physiology*; D009483:Neuropsychological Tests; D010812:Physical Stimulation / Q000379:methods; D011930:Reaction Time; D013003:Somatosensory Cortex / Q000502:physiology*; D013998:Time Perception / Q000502:physiology*; D055698:Touch Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult
keywords: alpha band; beamforming; beta band; electroencephalography; oscillations; supramodal