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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Thus local view consists of the sensory input available from a particular viewing
position and orientation in a specific environment. With a sufficiently rich set of
cues and no pathological symmetries in the environment, local views describe ...
Egocentric and Allocentric Bearing In addition to distance, orientation to
landmarks must be a key component of local view. Orientation can be encoded
egocen- trically or allocentrically. Egocentric bearing measures the angle
between the ...
As they noted, if the internal representation of head direction is primary, then the
effect of dis- orientation is like putting the cue card at a different location with
every trial. CUE TYPES Point Landmarks Although there are many examples of ...
The superior colliculus seems to be strongly involved in sensory orientation, but
not in locomotion toward a stimulus. Gerbils with superior colliculus lesions could
still go to an open door on the opposite side of the arena from their entry as long
Knierim, Kudri- moti, and McNaughton (1995) suggested that to the disoriented
rats, the cue card was an unstable cue (because the rats' reference orientation
changed from trial to trial, the cue card's orientation seemed to change from trial