nervous system
N |
• size of the anterior commissure and thickness of the cortex are similar to controls
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• postfixation weight is about 10% less than littermate controls
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• thinner
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• decreased cross-sectional area
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• decreased cross-sectional area of the stria terminalis
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• decreased thickness
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• decreased cross-sectional area
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• anterior aspect of the hippocampal gray matter begins ~100 um posterior in homozygous mice compared to wild-type littermate controls
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• deficits in mice at 17-19 weeks of age but not at 10-11 weeks of age
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behavior/neurological
• in the reversal learning test in a Morris water maze mice swim more slowly and take longer to find the hidden platform
• after 9 days of testing mice fail to reach the criterion for learning
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• in a probe trial in a Morris water maze mice fail to spend more time in the quadrant that previously held the platform
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• mice show significant impairment in the ability to learn the new location of a platform during the reversal phase of a Morris water maze assay
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• fail to show a preference for a novel stranger mouse over a known mouse
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• mild decrease in mice at 17-19 weeks of age but not at 10-11 weeks of age
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• fall off a rotating barrel sooner than controls but do show improved performance with training
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• significantly shorter maximum and average hang impulse in a four-paw rolling-wire hang assay suggesting a decrease in muscle tone
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