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This contribution is part of the special issue on the Hippocampus focused on personal histories of advances in knowledge on the hippocampus and related structures. An account is offered of the author's role in the development of neural ensemble recording: stereo recording (stereotrodes, tetrodes) and the use of this approach to search for evidence of Hebb's "cell assemblies" and "phase sequences", the holy grail of the neuroscience of learning and memory.
Bruce L. McNaughton (Mon,) studied this question.