Abstract/Details

Neural signals underlying coordinate frame of attention in area 7a of primate posterior parietal cortex


2009 2009

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Abstract (summary)

The posterior paritetal cortex is recognized as an association area that amalgamates sensory information and transforms it into signals enabling the coordination of motor actions. The allocation of visual attention is a necessary part of this process and posterior parietal area 7a is one of the main areas thought to mediate it. When 7a is compromised, disruptions such as visual neglect and apraxia can result. While evidence exists that 7a encodes sensory signals in world centered coordinates, the reference frame of visual attention was previously unknown. We observed that while some elements of 7a encoding are malleable dependent upon behavioral context, the reference frame of attention is also predominantly encoded in a world-referenced system. We also find that the electrophysiologically defined pyramidal and interneuron subtypes participate in approximately equal proportions in the 7a networks that mediate both visual attention and working memory.

Indexing (details)


Subject
Neurosciences
Classification
0317: Neurosciences
Identifier / keyword
Biological sciences; Apraxia; Posterior parietal cortex; Sensory signals
Title
Neural signals underlying coordinate frame of attention in area 7a of primate posterior parietal cortex
Author
Rawley, Justin
Number of pages
177
Publication year
2009
Degree date
2009
School code
0249
Source
DAI-B 70/09, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9781109402131
Advisor
Constantinidis, Christos
University/institution
Wake Forest University, The Bowman Gray School of Medicine
University location
United States -- North Carolina
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3380568
ProQuest document ID
305012216
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/305012216
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