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10 - Anosognosia and denial after right hemisphere stroke

Published online by Cambridge University Press:  10 October 2009

By
Anne Peskine  and
Philippe Azouvi
Edited by
Olivier Godefroy  and
Julien Bogousslavsky
Anne Peskine
Affiliation:
University of Versailles-Saint-Quentin, France
Philippe Azouvi
Affiliation:
University of Versailles-Saint-Quentin, France
Olivier Godefroy
Affiliation:
Université de Picardie Jules Verne, Amiens
Julien Bogousslavsky
Affiliation:
Université de Lausanne, Switzerland
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Summary

General presentation of anosognosia

Anosognosia is a puzzling condition. It refers to patients suffering from various neurological impairments who deny or lack awareness of their deficits, although these deficits may have serious consequences in their everyday life. Studying anosognosia is important for two reasons. The first one is a practical reason. Indeed, as pointed out by Heilman (1991), anosognosia is not a trivial problem. It may impair patients' motivation to engage in a rehabilitation program, and anosognosia has repeatedly been found associated with poor functional recovery from stroke. But studying anosognosia is also of great theoretical importance, as it may help our understanding of the complex relationships between brain injury and various forms of consciousness. However, despite this, anosognosia remains one of the least studied of the major neuropsychological symptoms after stroke, and its pathophysiology is still very poorly understood.

Detailed historical review of anosognosia have been published recently (Bisiach and Geminiani, 1991; Prigatano and Schacter, 1991). First observations of patients with impaired awareness of neurological deficits were reported in the late nineteenth century by von Monakow in 1885 and by Anton in 1889 in cases of cortical blindness. It seems that Pick, in 1898, was actually the first to report unawareness of left hemiplegia, but it was Joseph Babinski who first coined the term “anosognosia,” and his contribution, at a meeting held by the French Neurological Society on June 11, 1914, remains a landmark in the field (Babinski, 1914).

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The Behavioral and Cognitive Neurology of Stroke , pp. 198 - 214
Publisher: Cambridge University Press
Print publication year: 2007

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