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Claustrum projections to prefrontal cortex in the capuchin monkey (Cebus apella)
David H Reser1, Karyn E Richardson2, Marina O Montibeller1
1Department of Physiology, Monash University Clayton, VIC, Australia.
Frontiers in Systems Neuroscience
|July 30, 2014
Summary
Researchers studied brain connections in tufted capuchin monkeys, finding extensive projections between the claustrum and prefrontal cortex. These findings suggest the claustrum may help switch between resting and active brain networks.
Area of Science:
- Neuroscience
- Primate Brain Anatomy
- Comparative Neurology
Background:
- The claustrum's connectivity with the prefrontal cortex is not fully understood.
- Previous studies suggest varied claustrum-cortical connections across primate species.
Purpose of the Study:
- To map retrograde tracer distribution in the claustrum after injections into specific prefrontal cortex regions in the tufted capuchin monkey (Cebus apella).
- To analyze the topographic organization of claustrum-prefrontal connections.
- To explore the functional implications of claustrum connectivity for cortical networks.
Main Methods:
- Intracortical injections of retrograde tracers into the frontal pole (area 10), and dorsal (area 9) and ventral lateral (area 12) regions of the rostral prefrontal cortex.
- Assessment of labeled cell distribution within the claustrum.
- Comparison with existing data on claustrum-prefrontal connections in other primates.
Main Results:
- Extensive claustrum-prefrontal projections were observed.
- These projections were predominantly located in the ventral half of the claustrum, particularly in the rostral two-thirds.
- Data support a topographic arrangement where prefrontal and association cortices connect with the rostral and medial claustrum.
Conclusions:
- Claustrum-prefrontal connections exhibit a specific topographic organization in non-human primates.
- The claustrum's connectivity pattern suggests a potential role in modulating or switching between different cortical network states, such as resting-state and task-associated networks.
