Accession Number : ADA157540


Title :   Cognitive Science Program. Hierarchical Distributed Networks in the Neuropsychology of Selective Attention.


Descriptive Note : Final technical rept.,


Corporate Author : OREGON UNIV EUGENE DEPT OF PSYCHOLOGY


Personal Author(s) : Posner,M I


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a157540.pdf


Report Date : 15 May 1985


Pagination or Media Count : 38


Abstract : How does the brain perform cognitive tasks? This chapter approaches the general issue by outlining a computational model of visual-spatial attention. Studies of alert animals, brain injured patients and normals suggest that components of this model are performed by separate cortical and midbrain systems which are orchestrated to produce covert attentional shifts. These findings suggest a distributed network view of visual-spatial orienting with the cognitive operations performed in different anatomical locations. Attention to visual, auditory and tactile modalities appear to involve separate anatomical systems at the lowest level. At a higher level attention can be allocated to a common cognitive system for spatial location. Studies of non-visual spatial attention suggest that this higher level also involves the parietal cortex. Further studies suggest the presence of attentional systems which go beyond any single cognitive domain (e.g. spatial). However, our results show that attention to non-spatial language information does not involve the parietal system so important for spatial orienting. (Author)


Descriptors :   *COGNITION , *ATTENTION , *PERCEPTION(PSYCHOLOGY) , *CEREBRAL CORTEX , MATHEMATICAL MODELS , SPATIAL DISTRIBUTION , POSITION(LOCATION) , COMPUTATIONS , BRAIN , NETWORKS , DISTRIBUTION , ORIENTATION(DIRECTION) , OPERATION , WOUNDS AND INJURIES , VISUAL PERCEPTION , ANATOMY , NEUROLOGY , SPACE PERCEPTION


Subject Categories : Psychology
      Anatomy and Physiology


Distribution Statement : APPROVED FOR PUBLIC RELEASE