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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
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Mechanisms underlying selecting objects for action.

Melanie Wulff1, Rosanna Laverick1, Glyn W Humphreys2

  • 1School of Psychology, University of Birmingham Birmingham, UK.

Frontiers in Human Neuroscience
|May 9, 2015
PubMed
Summary
This summary is machine-generated.

Action knowledge and motor procedures guide object selection, with semantic distracters impairing performance. Impaired patients struggled with unrelated distracters, highlighting the role of visual streams in action decision-making.

Keywords:
action knowledgeattentionconceptual knowledgedual routesemantic interference

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Area of Science:

  • Cognitive Neuroscience
  • Neuropsychology
  • Human Computer Interaction

Background:

  • Object selection for action is crucial for daily tasks.
  • Understanding the influence of action knowledge and distracters is key to cognitive function.

Purpose of the Study:

  • To investigate how action knowledge and distracters affect object selection.
  • To identify neurological factors underlying impaired action decision-making.

Main Methods:

  • Comparing object selection in neuropsychological patients and healthy controls using real objects and computer-presented images.
  • Analyzing response times and accuracy in the presence of semantic and unrelated distracters.

Main Results:

  • Semantically related distracters slowed responses and increased errors.
  • Impaired patients showed greater sensitivity to unrelated distracters, particularly with real objects.
  • Lesions in parietal, temporal, and pre-motor regions correlated with deficits.

Conclusions:

  • Motor procedures and semantic knowledge significantly influence object selection for action.
  • Difficulty ignoring distracters is linked to impaired action decision-making.
  • Deficits can arise from damage to dorsal or ventral visual streams, with computer tasks showing rehabilitation potential.