title: [Hippocampal dimensions, memory and learning during rat ontogenesis].
abstract: Injury to the hippocamp disturbs learning processes and short-term memory in 20-, 50- and 110-day rats. In 50-day rats, hippocampectomy results in lesser changes in learning and memory than in 20- and 110-day animals. Anatomo-physiological characteristics of the hippocamp in 20-day rats presumably indicate a particular importance of this structure at early stages of ontogenesis, when the brain cortex is not yet sufficiently mature and its connections with other structures are not completely formed. Non-linear dependence of learning disturbance in rats of varying age after hippocampectomy suggests that in rat hippocampal function undergoes changes during individual development of animals.
mesh_terms: D000367:Age Factors; D000818:Animals; D001931:Brain Mapping; D002531:Cerebellum / Q000254:growth & development; D003214:Conditioning, Classical / Q000502:physiology*; D006624:Hippocampus / Q000254:growth & development / Q000502:physiology*; D008297:Male; D008570:Memory, Short-Term / Q000502:physiology*; D008636:Mesencephalon / Q000254:growth & development; D051381:Rats; D013687:Telencephalon / Q000254:growth & development
vernacular_title: Razmery gippokampa, pamiat' i obuchenie v ontogeneze u krys