Related Experiment Video
Updated: Jun 18, 2025
06:50
The Use of the Puzzle Box as a Means of Assessing the Efficacy of Environmental Enrichment
Published on: December 29, 2014
11.7K
Environmental enrichment reduces restricted repetitive behavior by altering gray matter microstructure.
Anna L Farmer1, Marcelo Febo2, Bradley J Wilkes3
1Department of Psychology, University of Florida, Gainesville, Florida, United States of America.
Plos One
|July 31, 2024
Summary
Environmental enrichment can reduce repetitive behaviors in neurodevelopmental disorders by altering brain microstructure. This study in mice reveals key brain regions involved, offering potential therapeutic targets for conditions like autism spectrum disorder.
Area of Science:
- Neuroscience
- Developmental Biology
- Neuroimaging
Background:
- Restricted, repetitive behaviors are core symptoms of neurodevelopmental disorders, including autism spectrum disorder.
- These behaviors are linked to poor developmental outcomes but are poorly understood with limited treatment options.
- Environmental enrichment is known to reduce repetitive behaviors, but the underlying mechanisms are unclear.
Purpose of the Study:
- To investigate microstructural brain alterations associated with repetitive behavior development in the C58 mouse model.
- To examine how environmental enrichment affects these microstructural changes and attenuates repetitive behaviors.
- To identify specific brain regions and pathways involved in the development and amelioration of repetitive behaviors.
Main Methods:
- Diffusion tensor imaging (DTI) was used to analyze brain microstructure in C58 mice (prone to repetitive behaviors) and C57BL/6 mice (control).
- Correlational analyses examined the relationship between repetitive motor behavior and diffusion metrics (e.g., fractional anisotropy, radial diffusivity, axial diffusivity).
- The impact of environmental enrichment on brain microstructure in juvenile C58 mice was assessed.
Main Results:
- Widespread differences in diffusion metrics were observed between C58 and C57BL/6 mice.
- In juvenile C58 mice, repetitive behavior negatively correlated with fractional anisotropy in gray matter regions.
- In adult C58 mice, repetitive behavior correlated with lower fractional anisotropy and higher radial diffusivity in the striatum.
- Environmental enrichment increased fractional anisotropy and axial diffusivity in juvenile C58 mice's gray matter, particularly in cerebellar and sensory regions.
Conclusions:
- Environmental enrichment reduces repetitive behavior development by altering gray matter microstructure in the cerebellum, medial entorhinal cortex, and sensory processing regions in juvenile C58 mice.
- Early microstructural pathology in these regions may contribute to later striatal and white matter dysfunction in adult C58 mice.
- Further research should explore the role of these regions and the link between sensory processing, cerebellar deficits, and repetitive behaviors.
