Beyond the Cognitive Map: From Place Cells to Episodic Memory
MIT Press, 1999 - Medical - 420 pages
There are currently two major theories about the role of the hippocampus, a distinctive structure in the back of the temporal lobe. One says that it stores a cognitive map, the other that it is a key locus for the temporary storage of episodic memories. A. David Redish takes the approach that understanding the role of the hippocampus in space will make it possible to address its role in less easily quantifiable areas such as memory. Basing his investigation on the study of rodent navigation--one of the primary domains for understanding information processing in the brain--he places the hippocampus in its anatomical context as part of a greater functional system.
Redish draws on the extensive experimental and theoretical work of the last 100 years to paint a coherent picture of rodent navigation. His presentation encompasses multiple levels of analysis, from single-unit recording results to behavioral tasks to computational modeling. From this foundation, he proposes a novel understanding of the role of the hippocampus in rodents that can shed light on the role of the hippocampus in primates, explaining data from primate studies and human neurology. The book will be of interest not only to neuroscientists and psychologists, but also to researchers in computer science, robotics, artificial intelligence, and artificial life.
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While there are no large-scale neural models of the rodent taxon navigation
system comparable to those of the locale system (e.g, O'Keefe and Nadel, 1978;
McNaughton et al., 1996; or Touretzky and Redish, 1996), there is evidence that
McNaughton and Morris, 1987; Rolls, 1989; Hasselmo and Bower, 1993;
Hasselmo and Schnell, 1994; Rolls, 1996). (The similarities and differences
between all of these theories will be discussed in chapter 13.) THE SELF-
and not anatomically (McNaughton et al., 1996; Redish, 1997; tamsonovicn and
McNaughton, 1997). Because the final stable state of this system is not a single
active cell, but a population of cells that encode a single location, I refer to this as
In contrast, because they use a single map to encode the environment when
animals wander around open arenas, place cells would be nondirectional (Wan,
Touretzky, and Redish, 1994c; McNaughton et al., 1996; Touretzky and Redish, ...
... 1993; McClelland, McNaughton, and O'Reilly, 1995; Squire and Alvarez, 1995;
Levy, 1996; Shen and McNaughton, 1996; Redish and Touret- zky, 1998a) and
experimentally (Pavlides and Winson, 1989; Wilson and McNaughton, 1994; ...