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Related Experiment Videos

Self-recognition in senile dementia.

F Biringer1, J R Anderson, D Strubel

  • 1Centre de Gériatrie, Hôpital de la Robertsau, Strasbourg, France.

Experimental Aging Research
|January 1, 1988
PubMed
Summary
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Self-recognition in Alzheimer's disease patients was assessed using mirror tests. Findings indicate self-recognition declines with disease progression, becoming compromised at Global Deterioration Scale stage 6.

Area of Science:

  • Neuroscience
  • Psychology

Background:

  • Senile dementia of the Alzheimer type impacts cognitive functions.
  • Self-recognition is a complex cognitive ability that may be affected by neurodegenerative diseases.

Purpose of the Study:

  • To investigate the capacity for self-recognition in women with Alzheimer's disease.
  • To determine the relationship between the severity of Alzheimer's disease and self-recognition abilities.

Main Methods:

  • Eighteen women with Alzheimer's disease were observed under mirror-image stimulation conditions.
  • The Global Deterioration Scale (GDS) was used to stage disease severity.
  • Self-recognition was assessed by observing reactions to a mark placed on the forehead and hand.

Main Results:

Related Experiment Videos

  • All subjects at GDS stage 5 demonstrated self-recognition when viewing a mark on their forehead in a mirror.
  • Fifty percent of subjects at GDS stage 6 showed self-recognition, while none at GDS stage 7 did.
  • Response to a directly visible mark on the hand differed, with all GDS 6 subjects reacting.

Conclusions:

  • The capacity for self-recognition appears to be compromised starting at GDS stage 6 in Alzheimer's disease.
  • Failure to demonstrate self-recognition in advanced Alzheimer's disease is not solely due to lack of motivation.