Neuroscience

Committing to memory

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Science  27 Nov 2015:
Vol. 350, Issue 6264, pp. 1052-1053
DOI: 10.1126/science.350.6264.1052-e

Changes in the neuronal network may consolidate memory, as seen in the Rosy Tritonia

PHOTO: JAMES L. AMOS/SCIENCE SOURCE

Neuronal networks in the brain can expand during memory formation, but where do the additional neurons come from? Hill et al. visually tracked this process in the marine mollusk Tritonia diomedea, as the animal became more sensitized to a stimulus that evokes its escape swim response. Inactive neurons appeared to be “pre-positioned” for rapid recruitment into an existing network as the animal displayed a learned response. As the memory faded, some new recruits remained committed to the network, while some original neurons departed. Continual change in the cellular constituents of a network may be a mechanism of memory formation.

Curr. Biol. 25, 1 (2015).

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