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The hippocampus plays an important role in the transfer of information from short-term memory to long-term memory during encoding and retrieval stages. These stages do not need to occur successively, but are, as studies seem to indicate, and they are broadly divided in the neuronal mechanisms that they require or even in the hippocampal areas ...
Children become able to replicate more complex events with greater detail, from memory. [9] Jean Piaget, a child development psychologist, conducted a study testing the cognitive and memory abilities of children around 2 years of age. These tests were conducted using objects presented to the child followed by their removal from sight.
The trisynaptic circuit is a neural circuit in the hippocampus, which is made up of three major cell groups: granule cells in the dentate gyrus, pyramidal neurons in CA3, and pyramidal neurons in CA1. The hippocampal relay involves three main regions within the hippocampus which are classified according to their cell type and projection fibers.
The hippocampus is also involved in memory consolidation, the slow process by which memories are converted from short to long term memory. This is supported by studies in which lesions are applied to rat hippocampi at different times after learning. [2] The process of consolidation may take up to a couple years.
For example, the hippocampus is believed to be involved in spatial and declarative memory, as well as consolidating short-term into long-term memory. Studies have shown that declarative memories move between the limbic system , deep within the brain, and the outer, cortical regions.
Exercise improves working memory. A study of school children in Germany has shown that moderate exercise can improve working memory. This has the most benefit for those children who have demonstrated prior learning problems. [15] One neuroimaging study showed a relationship between fitness, hippocampal volume, and some types of memory tasks. [16]
The hippocampus in communication with the neocortex mediates memory degradation. Plastic changes occurring in the hippocampus are involved in directing the process of memory storage. The Schaffer collateral is involved in activity-dependent plasticity and the information processes that always are processed through the hippocampus all the time.
The hippocampal subfields are four subfields CA1, CA2, CA3, and CA4 that make up the structure of the hippocampus. Regions described in the hippocampus are the head, body, and tail, and other hippocampal subfields include the dentate gyrus , the presubiculum , and the subiculum .