Stress and estrous cycle affect strategy but not performance of female C57BL/6J mice. 2013

J P ter Horst, and J Kentrop, and E R de Kloet, and M S Oitzl
Division of Medical Pharmacology, Leiden Amsterdam Center for Drug Research and Leiden University Medical Center, Leiden University, Leiden, The Netherlands. Judith_ter_Horst@hotmail.com

Stress induces a switch in learning strategies of male C57BL/6J mice from predominantly spatial to more stimulus-response learning. To study generalization of these findings over sex, we investigated female C57BL/6J mice at three phases of the estrous cycle under non stress and acute (10 min) restraint stress conditions. On a circular hole board (CHB) task, about half of the naive female mice used spatial and stimulus-response strategies to solve the task. Under stress, female mice favored spatial over stimulus-response strategies, with 100% of female mice in the estrus phase. Performance expressed as latency to solve the task is only improved in stressed female mice in the estrus phase. We conclude that the use of learning strategies is influenced by sex and this difference between sexes is aggravated by acute stress.

UI MeSH Term Description Entries
D008568 Memory Complex mental function having four distinct phases: (1) memorizing or learning, (2) retention, (3) recall, and (4) recognition. Clinically, it is usually subdivided into immediate, recent, and remote memory.
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D011930 Reaction Time The time from the onset of a stimulus until a response is observed. Response Latency,Response Speed,Response Time,Latency, Response,Reaction Times,Response Latencies,Response Times,Speed, Response,Speeds, Response
D005260 Female Females
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013037 Spatial Behavior Reactions of an individual or groups of individuals with relation to the immediate surrounding area including the animate or inanimate objects within that area. Behavior, Spatial,Behaviors, Spatial,Spatial Behaviors
D013315 Stress, Psychological Stress wherein emotional factors predominate. Cumulative Stress, Psychological,Emotional Stress,Individual Stressors,Life Stress,Psychological Cumulative Stress,Psychological Stress Experience,Psychological Stress Overload,Psychologically Stressful Conditions,Stress Experience, Psychological,Stress Measurement, Psychological,Stress Overload, Psychological,Stress Processes, Psychological,Stress, Emotional,Stressful Conditions, Psychological,Psychological Stress,Stress, Psychologic,Stressor, Psychological,Condition, Psychological Stressful,Condition, Psychologically Stressful,Conditions, Psychologically Stressful,Cumulative Stresses, Psychological,Experience, Psychological Stress,Individual Stressor,Life Stresses,Measurement, Psychological Stress,Overload, Psychological Stress,Psychologic Stress,Psychological Cumulative Stresses,Psychological Stress Experiences,Psychological Stress Measurement,Psychological Stress Measurements,Psychological Stress Overloads,Psychological Stress Processe,Psychological Stress Processes,Psychological Stresses,Psychological Stressful Condition,Psychological Stressful Conditions,Psychological Stressor,Psychological Stressors,Psychologically Stressful Condition,Stress Experiences, Psychological,Stress Processe, Psychological,Stress, Life,Stress, Psychological Cumulative,Stressful Condition, Psychological,Stressful Condition, Psychologically,Stressor, Individual
D051379 Mice The common name for the genus Mus. Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus
D018782 Maze Learning Learning the correct route through a maze to obtain reinforcement. It is used for human or animal populations. (Thesaurus of Psychological Index Terms, 6th ed) Maze Test,Learning, Maze,Maze Learnings,Maze Tests
D030762 Estrous Cycle The period of cyclic physiological and behavior changes in non-primate female mammals that exhibit ESTRUS. The estrous cycle generally consists of 4 or 5 distinct periods corresponding to the endocrine status (PROESTRUS; ESTRUS; METESTRUS; DIESTRUS; and ANESTRUS). Cycle, Estrous,Cycles, Estrous,Estrous Cycles

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