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Subcognitive processing in the frontocaudate "complex loop": the role of the striatum
A E Taylor1, J A Saint-Cyr, A E Lang
1Department of Psychology, Toronto Western Hospital, Ontario, Canada.
Alzheimer Disease and Associated Disorders
|January 1, 1990
Summary
This study explores the basal ganglia's role in cognitive functions, particularly in Parkinson disease. Research suggests the basal ganglia help regulate the context for mental and motor actions, operating at a subcognitive level.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Neurology
Background:
- Anatomical links between frontal lobes and basal ganglia suggest shared roles in behavior.
- Previous research in primates and patients provides foundational understanding.
- Parkinson disease offers a model for studying these cognitive functions.
Purpose of the Study:
- To review early research on frontal lobe-basal ganglia connections.
- To investigate cognitive routines affected in Parkinson disease.
- To propose a hypothesis on the basal ganglia's function in the frontostriate system.
Main Methods:
- Review of existing literature on nonhuman primate and patient studies.
- Analysis of current research on Parkinson disease and cognitive functions.
- Development of a theoretical hypothesis based on reviewed evidence.
Main Results:
- The basal ganglia appear to constrain the contextual boundaries for cognitive and motor events.
- Evidence points towards a subcognitive mechanism for this contextual regulation.
- Specific cognitive routines are identified as vulnerable in Parkinson disease.
Conclusions:
- The basal ganglia play a crucial role in modulating the context of cognitive and motor processing.
- This modulation likely occurs via subcognitive mechanisms.
- Understanding this function is key to comprehending deficits in Parkinson disease.