Worm holes and avian space-time: Can animals remember where and when events happened? A study of birds that hoard and then retrieve their foods shows they can, and may ultimately provide clues about how human memories are formed

Article Abstract:

The 'what' and 'where' memory of bird has been studied in a range of ecologically motivated experiments, capitalizing on the ability of certain species to hoard food in several locations. Clayton and Dickinson have studied scrub jays to ascertain whether birds can remember what they have stored. Birds exhibited a strong preference to less tasty but more reliable peanut caches, if worms used in the experiment had been stored some time previously. It is possible that the bird form an internal map of cache locations.

Behavior, Memory, Birds

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Geometric determinants of the place fields of hippocampal neurons

Article Abstract:

A model for the geometric determinants of the place fields of hippocampal place cells (complex spike cells) is used to identify the environmental features affecting the location and shape of the receptive fields of the place cells. The model uses the sum of gaussian tuning curves that are perpendicular to a box wall and are at a fixed distance from it. The place cells play a role in spatial memory, which is seen from their spatially localized firing in rats.

Analysis, Usage, Animal memory, Gaussian distribution, Normal distribution

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Independent rate and temporal coding in hippocampal pyramid cells

Article Abstract:

Hippocampal pyramidal cells use temporal as well as rate coding to signal spatial aspects of the animal's environment or behavior. The temporal code takes the form of a phase relationship to the concurrent cycle to the hippocampal electro-encephalogram theta rhythm.

Cells (Biology), Cells, Structure, Animal cell biotechnology, Animal biotechnology

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