Brain mechanisms of sensorimotor learning: "What" and "where" neural processes support sensorimotor integration in intramodal and crossmodal cueing paradigms.
Published: 2007
Language: eng
Number of pages: 63
ISBN-13: 9780494274019
Description: In this study, evoked potentials were used to test whether coordination of responses based on spatial location or identity of visual and auditory stimuli involved functionally segregated neural pathways. Using distinct cue and target pairings, normal subjects were instructed to identify and localize lateralized auditory and visual stimuli in an intramodal and crossmodal cueing paradigm. In terms of behaviour, responses to targets based on their location in space were performed faster than responses based on their identity. Furthermore, crossmodal conditions were performed faster than intramodal ones. Analysis of the evoked potentials following the stimuli showed that (i) a sensory-specific "what" versus "where" segregation follows the presentation of the cue, as participants get ready to process the identity and location of the target, respectively, and (ii) a sensory-independent mapping of extrapersonal space follows the target presentation, as participants prepare to respond to the location of the target.
Notes: Source: Masters Abstracts International, Volume: 45-06, page: 3310.

Thesis (M.A.)--University of Toronto, 2007.

Electronic version licensed for access by U. of T. users.

ROBARTS MICROTEXT copy on microfiche.