behavior/neurological
• 9 month old mice show impairment in spatial memory in the Morris water maze, needing more time to reach the hidden platform
• in the probe test, mutants spent a similar amount of time around the area where the hidden platform had been compared to time spent in the other areas unlike wild-type mice which spend more time around the area where the hidden platform had been placed
• 9 month old mutants show impaired spatial memory in a Y-maze test
• oral administration of hop flower extract improves spatial memory
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