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Egocentric and Allocentric Spatial Memory in Korsakoff's Amnesia.

Gabriele Janzen1,2, Claudette J M van Roij3, Joukje M Oosterman2

  • 1Behavioral Science Institute, Radboud University Nijmegen, Nijmegen, Netherlands.

Frontiers in Human Neuroscience
|April 17, 2020
PubMed
Summary
This summary is machine-generated.

Korsakoff syndrome (KS) patients show intact spatial memory, utilizing both egocentric and allocentric frames. Despite amnesia, their ability to navigate and remember locations in virtual environments is preserved.

Keywords:
Korsakoff’s syndromeallocentricamnesiadelayegocentriclandmarksspatial memory

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neuropsychology

Background:

  • Korsakoff syndrome (KS) is a severe form of amnesia often resulting from chronic alcoholism.
  • Impairments in spatial memory and the use of egocentric and allocentric reference frames are not well understood in KS patients.

Purpose of the Study:

  • To investigate spatial memory and the utilization of egocentric versus allocentric reference frames in patients with Korsakoff syndrome.
  • To determine if KS patients exhibit differential impairments in using these two spatial reference frames.

Main Methods:

  • A virtual reality spatial memory task was employed with 20 KS patients and 24 controls.
  • Participants identified object locations after camera rotation, with conditions varying in landmark presence and memory delay.
  • Performance was assessed by comparing accuracy across egocentric and allocentric trials.

Main Results:

  • KS patients performed significantly worse than controls overall.
  • Landmarks and immediate responses improved performance for all participants.
  • KS patients struggled in allocentric trials without landmarks and with a memory delay, performing at chance level.

Conclusions:

  • Despite amnesia, Korsakoff patients demonstrate preserved spatial memory capabilities.
  • The ability to use both egocentric and allocentric spatial reference frames appears to be spared in Korsakoff syndrome.