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The structural basis for mapping behavior onto the ventral striatum and its subdivisions
Gloria E Meredith1, Brian A Baldo, Matthew E Andrezjewski
1Department of Cellular and Molecular Pharmacology, Chicago Medical School, Rosalind Franklin University of Medicine and Science, 3333 Green Bay Road, North Chicago, IL 60064, USA. gloria.meredith@rosalindfranklin.edu
Brain Structure & Function
|February 8, 2008
Summary
Structural differences in nucleus accumbens core and shell neurons may explain distinct roles in behavior. These findings highlight how neuron morphology impacts neuroadaptations and goal-directed actions.
Area of Science:
- Neuroscience
- Cell Biology
Background:
- The striatum, a key brain region, is divided into dorsal and ventral parts.
- The ventral striatum includes the nucleus accumbens, crucial for adaptive and goal-directed behaviors.
- The nucleus accumbens is further subdivided into shell and core regions.
Purpose of the Study:
- To evaluate structural differences between nucleus accumbens core and shell neurons.
- To discuss how these morphological variations might underlie distinct behavioral processes.
Main Methods:
- This review synthesizes existing research on neuronal morphology.
- Comparative analysis of medium spiny neurons in accumbens core versus medial shell.
Main Results:
- Nucleus accumbens core neurons are medium-sized and densely spiny.
- Medial shell neurons are smaller with significantly less spiny dendrites.
- These morphological differences suggest region-specific neuroadaptations.
Conclusions:
- Distinct neuronal structures in the nucleus accumbens core and shell likely mediate different functions.
- Morphological variations support specialized roles in processing stimuli and executing behaviors.
- Understanding these differences is key to comprehending adaptive and drug-related behaviors.
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