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Dissociation between striatal regions while learning to categorize via feedback and via observation
Corinna M Cincotta1, Carol A Seger
1Colorado State University, Fort Collins, CO 80523, USA.
Journal of Cognitive Neuroscience
|February 7, 2007
Summary
The head of the caudate processes feedback during visual categorization learning, while other striatal regions learn stimulus-category associations. This reveals functional specialization within the striatum for distinct learning processes.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Neuroimaging
Background:
- The striatum is implicated in visual categorization learning with feedback.
- Specific roles of striatal subregions in feedback processing versus association learning remain unclear.
Purpose of the Study:
- To investigate the differential involvement of striatal subregions in feedback processing and stimulus-category association learning.
- To compare neural activity during feedback learning versus observational learning.
Main Methods:
- Functional imaging (fMRI) and a region-of-interest analysis of the striatum.
- Comparison of feedback learning (stimulus-response-feedback) with observational learning (category label provided before stimulus).
Main Results:
- The left head of the caudate showed greater activation during feedback learning than observational learning.
- The body and tail of the caudate and putamen showed similar activity in both learning conditions.
- The hippocampus was bilaterally active in both conditions.
Conclusions:
- The head of the caudate is specifically involved in feedback processing during category learning.
- The body and tail of the caudate and putamen are involved in learning stimulus-category associations.
- The hippocampus may play a parallel role in information integration for category learning.
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