NROC64H3 Lecture : AR1: Multisensory spatial interactions: a window onto functional integration in the human brain (Summarized)

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Ar 1: multisensory spatial interactions: a window onto functional integration in the human brain. convergence from sensory-specific into multisensory cortices (ie: from unimodal cortices into heteromodal brain areas) Introduction: y common neuro theme = functional specialization: distinct cognitive, sensory, motor fxns localized in distinct brain regions, functional neuroimaging = useful for exploring/confirming this theme, ex) identification of sensory-specific areas responding to stimulation in one sensory modality. visual detection enhanced at the sound location. crossmodal links in spatial attention y signals in different modalities from common external source: often spatially & temporally aligned. multisensory integration subject 2 corresponding spatial & temporal constraints y neural basis of multi-sensory interactions studied via: vpm y constraint on multisensory processing = stimulus location: study: used fmri investigate location-dependent activations for touch and vision. w/ tactile stimulation of l or r hand or. visual and spatial stimuli was presented in either multisensory spatial congruence or incongruence: results:

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