title: A forced-attention dichotic listening fMRI study on 113 subjects.
abstract: We report fMRI and behavioral data from 113 subjects on attention and cognitive control using a variant of the classic dichotic listening paradigm with pairwise presentations of consonant-vowel syllables. The syllable stimuli were presented in a block-design while subjects were in the MR scanner. The subjects were instructed to pay attention to and report either the left or right ear stimulus. The hypothesis was that paying attention to the left ear stimulus (FL condition) induces a cognitive conflict, requiring cognitive control processes, not seen when paying attention to the right ear stimulus (FR condition), due to the perceptual salience of the right ear stimulus in a dichotic situation. The FL condition resulted in distinct activations in the left inferior prefrontal gyrus and caudate nucleus, while the right inferior frontal gyrus and caudate were activated in both the FL and FR conditions, and in a non-instructed (NF) baseline condition.
authors.affiliation: Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway. kristiina.kompus@psybp.uib.no
authors.forename: Kristiina
authors.initials: K
authors.lastname: Kompus
authors.forename: Karsten
authors.initials: K
authors.lastname: Specht
authors.forename: Lars
authors.initials: L
authors.lastname: Ersland
authors.forename: Hilde T
authors.initials: HT
authors.lastname: Juvodden
authors.forename: Heidi
authors.initials: H
authors.lastname: van Wageningen
authors.forename: Kenneth
authors.initials: K
authors.lastname: Hugdahl
authors.forename: René
authors.initials: R
authors.lastname: Westerhausen
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D001288:Attention / Q000502:physiology*; D001307:Auditory Perception / Q000502:physiology*; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008297:Male