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"...Each place cell receives two different inputs, one conveying information about a large number of envi-
 

Summary: "...Each place cell receives two different inputs, one
conveying information about a large number of envi-
ronmental stimuli or events, and the other from a navi-
gational system which calculates where an animal is in
an environment independently of the stimuli impinging
on it at that moment. The input from the navigational
system gates the environmental input, allowing only
those stimuli occurring when the animal is in a particu-
lar place to excite a particular cell.
One possible basis for the navigational system relies
on the fact that information about changes in position
and direction in space could be calculated from the ani-
mal's movements. When the animal had located itself in
an environment (using environmental stimuli) the hip-
pocampus could calculate subsequent positions in that
environment on the basis of how far, and in what direc-
tion the animal had moved in the interim... In addition
to information about distance traversed, a navigational
system would need to know about changes in direction
of movement either relative to some environmental land-

  

Source: Andrzejak, Ralph Gregor - Departament de Tecnologia, Universitat Pompeu Fabra

 

Collections: Computer Technologies and Information Sciences