Anosognosie et action

The princeps description and interpretation by Joseph Babinski of anosognosia and anosodiaphoria date from a hundred years back. Their definition could at first have seemed simple, but it has become more complex with the increasing interest in this neurological condition. Numerous observations have supported a wide range of viewpoints, and will here be briefly described, among other examples, how the modern problem of identity presents itself in this respect. Amid the numerous interpretations of the phenomenon, the focus here is on those that call on contemporary theories of action, enabling an understanding of anosognosia observed in impairments and disorders of movement, not only abruptly-occurring deficits, but also slowly evolving conditions, such as Parkinson's disease and related syndromes.