Why John O'Keefe, May-Britt Moser, Edvard Moser got Nobel Prize in Physiology or medicine

Stockholm: US-British scientist John O'Keefe and Norwegian married couple May-Britt Moser and Edvard Moser won the Nobel Prize in medicine on Monday for discovering the brain's positioning system.

O'Keefe, of University College London, discovered the first component of this positioning system in 1971 when he found that a certain type of nerve cell was always activated when a rat was at a certain place in a room.

Thirty-four years later May-Britt and Edvard Moser, of the Norwegian University of Science and Technology in Trondheim, identified another type of nerve cell that generates a coordinate system for precise path-finding, the Nobel Assembly said.

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