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Attention, intention, and priority in the parietal lobe.
James W Bisley1, Michael E Goldberg
1Department of Neurobiology and Jules Stein Eye Institute, David Geffen School of Medicine, and Department of Psychology and the Brain Research Institute, University of California, Los Angeles, California 90095, USA. jbisley@mednet.ucla.edu
Annual Review of Neuroscience
|March 3, 2010
Summary
The lateral intraparietal area (LIP) acts as a priority map, integrating sensory and planned movement signals. This map guides both eye movements (saccades) and visual attention to behaviorally relevant objects.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Systems Neuroscience
Background:
- The parietal lobe's role in behavior generation is debated, specifically whether it plans movements or selects environmental targets.
- The lateral intraparietal area (LIP) is implicated in both saccade target selection and visual attention.
Purpose of the Study:
- To investigate the function of the lateral intraparietal area (LIP) in behavior generation.
- To determine if LIP acts as a movement intention generator or an environmental object selector.
Main Methods:
- Analysis of LIP's activity across various behavioral tasks.
- Investigating the integration of bottom-up sensory inputs and top-down cognitive signals within LIP.
Main Results:
- Evidence suggests LIP functions as a priority map, with activity proportional to an object's behavioral priority.
- This priority map integrates rapid visual responses (bottom-up) with saccade plans (top-down).
Conclusions:
- The LIP priority map guides saccade targeting by the oculomotor system.
- The LIP priority map directs visual attention by the visual system.
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