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Differences in behavioural test battery performance between mice with hippocampal and cerebellar lesions
Hannelore Goddyn1, Sandra Leo, Theo Meert
1Laboratory of Biological Psychology, Department of Psychology, University of Leuven, Tiensestraat 102, B-3000 Leuven, Belgium.
Behavioural Brain Research
|July 25, 2006
Summary
This study shows that specific behavioral tests can differentiate between hippocampal and cerebellar lesions in mice. Neuromotor deficits indicate cerebellar damage, while hyperactivity suggests hippocampal damage.
Area of Science:
- Neuroscience
- Behavioral Neuroscience
- Animal Models
Background:
- Hippocampal and cerebellar lesions are well-documented, but their distinct behavioral effects in mice are not fully characterized.
- Differentiating lesion effects is crucial for understanding brain function and designing accurate behavioral assays.
Purpose of the Study:
- To compare the behavioral outcomes of hippocampal and cerebellar lesions using a battery of common laboratory mouse tests.
- To determine if behavioral tests can reliably distinguish between these specific brain lesions.
Main Methods:
- Large bilateral hippocampal and hemispheric cerebellar lesions were induced in laboratory mice.
- Mice underwent eight behavioral tests assessing neuromotor performance, exploratory behavior, learning, and memory.
- Behavioral variables were correlated with lesion size.
Main Results:
- Cerebellar lesions primarily caused neuromotor impairments (e.g., rotarod task), while hippocampal lesions led to hyperactivity (e.g., cage activity).
- The Morris maze did not show clear dissociation, but contextual fear conditioning revealed selective freezing deficits in hippocampus-lesioned mice and increases in cerebellum-lesioned mice.
- Several behavioral variables correlated differently with lesion sizes.
Conclusions:
- A battery of behavioral tests can effectively differentiate between hippocampal and cerebellar lesions in laboratory mice.
- Specific tests highlight distinct functional deficits associated with each lesion type, aiding in neuroscientific research.
