| Sumario: | Different and frequently opposed theories and models of the hippocampal function have been developed. Some theories proposed that when some expectations are not accomplished the hippocampus would inhibit: attention, activation, or non-reward responses. A second type of theory supports that the hippocampal function would be the selection of the information to be stored: into the trace, into the long-term memory. A third type of theory proposes that in the hippocampus would be stored: contextual maps, spatial maps, temporal maps, attentional-associative networks, contingencies detectors, semantics systems, recognition memory, work memory. The common element among all theories would be the detection of the differences between a neural model and a new input, as Sokolov proposed in 1960.
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