Functional Convergence of Motor and Social Processes in Lobule IV/V of the Mouse Cerebellum
Journal
The Cerebellum
Series/Report No.
Cerebellum
Journal Volume
20
Journal Issue
6
Start Page
836-852
ISSN
1473-4222
1473-4230
Date Issued
2021-03-04
Author(s)
Abstract
Topographic organization of the cerebellum is largely segregated into the anterior and posterior lobes that represent its "motor" and "non-motor" functions, respectively. Although patients with damage to the anterior cerebellum often exhibit motor deficits, it remains unclear whether and how such an injury affects cognitive and social behaviors. To address this, we perturbed the activity of major anterior lobule IV/V in mice by either neurotoxic lesion or chemogenetic excitation of Purkinje cells in the cerebellar cortex. We found that both of the manipulations impaired motor coordination, but not general locomotion or anxiety-related behavior. The lesioned animals showed memory deficits in object recognition and social-associative recognition tests, which were confounded by a lack of exploration. Chemogenetic excitation of Purkinje cells disrupted the animals' social approach in a less-preferred context and social memory, without affecting their overall exploration and object-based memory. In a free social interaction test, the two groups exhibited less interaction with a stranger conspecific. Subsequent c-Fos imaging indicated that decreased neuronal activities in the medial prefrontal cortex, hippocampal dentate gyrus, parahippocampal cortices, and basolateral amygdala, as well as disorganized modular structures of the brain networks might underlie the reduced social interaction. These findings suggest that the anterior cerebellum plays an intricate role in processing motor, cognitive, and social functions.
Subjects
Cerebellum
Chemogenetics
Functional connectivity
Lesion
Object recognition
Social memory
SDGs
Publisher
Springer Science and Business Media LLC
Type
journal article