title: Modeling inhibition of return as short-term depression of early sensory input to the superior colliculus.
abstract: Inhibition of return (IOR) is an orienting phenomenon characterized by slower behavioral responses to spatially cued, relative to uncued targets, when the cue-target onset asynchronies (CTOAs) are long enough that cue-elicited attentional capture has dispersed. Here, we implement a short-term depression (STD) account of IOR within a neuroscientifically based dynamic neural field model (DNF) of the superior colliculus (SC). In addition to the prototypical findings in the cue-target paradigm (i.e., the biphasic pattern of behavioral enhancement at short CTOAs and behavioral costs at long CTOAs), a variety of findings in the literature are generated with this model, including IOR in averaging saccades and the co-existence of IOR and endogenous orienting at the same location. Many findings that cannot be accommodated by this model could be accounted for by incorporating cortical contributions.
authors.affiliation: Dalhousie University, Halifax, NS, Canada. jsatel@dal.ca
authors.forename: J
authors.initials: J
authors.lastname: Satel
authors.forename: Z
authors.initials: Z
authors.lastname: Wang
authors.forename: T P
authors.initials: TP
authors.lastname: Trappenberg
authors.forename: R M
authors.initials: RM
authors.lastname: Klein
mesh_terms: D001288:Attention / Q000502:physiology*; D003463:Cues; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D007266:Inhibition, Psychological; D008959:Models, Neurological; D011930:Reaction Time / Q000502:physiology; D012438:Saccades / Q000502:physiology; D013028:Space Perception / Q000502:physiology; D013477:Superior Colliculi / Q000502:physiology*