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Updated: Jul 27, 2026

Long-term Potentiation of Perforant Pathway-dentate Gyrus Synapse in Freely Behaving Mice
Published on: November 29, 2013
The discovery of long-term potentiation
1Department of Physiology, University of Oslo, P.O. Box 1103, Blindern, 0317 Oslo, Norway. terje.lomo@baslmed.uio.no
Abstract:
This paper describes circumstances around the discovery of long-term potentiation (LTP). In 1966, I had just begun independent work for the degree of Dr medicinae (PhD) in Per Andersen's laboratory in Oslo after an eighteen-month apprenticeship with him. Studying the effects of activating the perforant path to dentate granule cells in the hippocampus of anaesthetized rabbits, I observed that brief trains of stimuli resulted in increased efficiency of transmission at the perforant path-granule cell synapses that could last for hours. In 1968, Tim Bliss came to Per Andersen's laboratory to learn about the hippocampus and field potential recording for studies of possible memory mechanisms. The two of us then followed up my preliminary results from 1966 and did the experiments that resulted in a paper that is now properly considered to be the basic reference for the discovery of LTP.
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