Ganser-like syndrome after loss of psychic self-activation syndrome: psychogenic or organic?

Very few data are available on the long-term changes in the cognitive abilities of patients with loss of psychic self-activation syndrome (LPSAS). Here, we present a 25-year follow-up study on a case of LPSAS resulting from bilateral pallidal lesions caused by carbon monoxide intoxication. Typical signs of LPSAS were observed, showing no changes in severity, but Ganser syndrome (GS) gradually developed and worsened during the follow-up period. GS is generally assumed to be a psychogenic syndrome, but an organic etiology has been suspected by the authors of several case reports. Here, atypical features of GS plead against the independence of GS and LPSAS. DaTSCAN and brain 18FDG-PET were performed. Since left hippocampal hypometabolism has been previously described in patients with functional amnesia, it is possible that long periods of mental inactivity may have psychological consequences, but the atypical features of GS also suggest that an organic mechanism may be involved.

[Pseudodementia, what are we talking about? Part I: In search of Wernicke's pseudodementia]

OBJECTIVE

The authors explore the history of pseudodementia in the elderly; an issue with growing momentum in a world where life duration expectancy has been constantly growing and the management and treatments of dementias has imposed an equally increasing burden. Although the issue is mainly therapeutic, some of the main tenets of the current approaches rest heavily on historical issues. The invention of the term pseudodementia (Pseudodemenz) is usually credited to Wernicke. However, the exact circumstances and the debates that have accompanied the emergence of the term have never been fully uncovered, and the references are not accurate. Most of the recent literature cites Kiloh as the key influence in structuring the current uses of the term, but the relationship between both sources is not clear.

METHODOLOGY

A research of anteriority has been conducted on the basis of Medline via Pubmed, PsychINFO and google book, using the following keywords: pseudodementia, pseudodementia, depressive pseudodementia, pseudodémence, Pseudodemenz. We have researched the quotations to localize the origin of the concept. Complementarily, we have attempted to clarify the nature of the debates by exploring the relevant German psychiatric literature at the end of the XIXth century and the beginning of the XXth.

RESULTS

We have found that the very first occurrences of the notion appeared in a debate between the following authors: Ganser S.J.M. 1898, 1903; Wernicke C. 1898; Raecke J. 1901; Nissl F. 1902; Jung C.G. 1902, 1903; Stertz G. 1910; Bonhoeffer K. 1911; Schuppius S. 1914. We found that the term Pseudodemenz never appears in Wernicke's written works, although he was credited of its invention by his most direct students. It seems that the term was thought by the time it emerged to have originated in Wernicke's discussion of Ganser's syndrome.

DISCUSSION

Ganser's syndrome, often defined as carceral psychosis, is a specific hysterical twilight state characterized by "talking past the point" (Vorbeireden), amnesia and hysterical stigmas, in which some trauma was thought to be causative. Wernicke presented it as determined by a "restriction of the field of consciousness", echoing Janet's theory (École de la Salpêtrière). He rejected the twilight characteristic: this differential point seems to have initiated the introduction of the concept of pseudodementia. Raecke argued that such states should not be understood as forms of simulation thus contributing to a heated debate of the time. Referring to Janet's works and expanding the syndrome of "traumatic hysteria", he argued in favor of a specific inhibiting factor which disturbs the process of associations. Jung, refusing Nissl's article dismissing Ganser, Wernicke and Raecke's views, confirmed the hysterical hypothesis. In a new contribution to the debate, Ganser contested Wernicke's differential point, arguing that in Vorbeireden, there was a Benommenheit - some sort of giddiness - and a "superficiality of the contents of consciousness" rather than a limitation of consciousness. It has been rightly argued that Wernicke's view of the pseudodementia issues was mainly related to the debates on hysteria and trauma, and that no relationship with old age symptomatology was established by him. However, we have found that he alluded to at least one case in which such a relationship was hypothesized. Moreover, one should note that Wernicke's views on hysteria included the rather pervasive notion of "hysterical psychosis", exhibiting "allopsychosis", which could include what would nowadays be seen as schizophrenia or psychotic mood disorders.

CONCLUSIONS

First of all, the term Pseudodemenz, if it was ever used by Wernicke verbally, never appears in his published works. Besides, the debates concerning Ganser's syndrome, which served as a first paradigm to discuss pseudodementia, were highly influenced by the discussions on traumatic disorders, hysteria and simulation. Finally, although no direct connection is made between disorders of the senium and Pseudodemenz, the fact that Wernicke included both in what he termed "allopsychic disorders" seemed to indicate that some kind of relationship could not be absolutely excluded in Wernicke's mind.

Ganser syndrome and lesion in the temporoparietal region

Ganser syndrome is a rare dissociative disorder. It has been reported in association with various functional psychiatric disorders and organic states, most often in patients with head injury and stroke, especially those involving the frontal lobes. The present case of Ganser syndrome had features of hysterical dissociation but was found to have haemorrhage in the temporoparietal region of the dominant hemisphere. The complexities of Ganser syndrome in the presence of an organic lesion with an overwhelming emotional component are discussed.

Neurobiological basis of ganser syndrome

Ganser syndrome continues to be a rare and widely misunderstood condition. While DSM-IV classifies Ganser syndrome as a dissociative disorder, its etiology continues to be debated. There are episodic reports in the literature of Ganser syndrome in patients with head trauma or strokes. However, the mechanisms by which these cerebral insults lead to Ganser syndrome or other dissociative states are largely unknown.A case of a patient with Ganser syndrome with a prior history of stroke and bifrontal infarcts is described. This case demonstrates how organic pathology may predispose a patient to dissociative states, such as Ganser syndrome. We review the relationship between hyperglutamatergic states, caused by stroke and stress, and dissociative symptoms.Ganser syndrome continues to be a rare and widely misunderstood condition. While DSM-IV classifies Ganser syndrome as a dissociative disorder, its etiology continues to be debated. There are episodic reports in the literature of Ganser syndrome in patients with head trauma or strokes. However, the mechanisms by which these cerebral insults lead to Ganser syndrome or other dissociative states are largely unknown.A case of a patient with Ganser syndrome with a prior history of stroke and bifrontal infarcts is described. This case demonstrates how organic pathology may predispose a patient to dissociative states, such as Ganser syndrome. We review the relationship between hyperglutamatergic states, caused by stroke and stress, and dissociative symptoms.