Misidentification Delusions, Facial Misrecognition, and Right Brain Injury

Silva, J A; Gb, Leong; Wine, David B.

doi:10.1177/070674379303800401

Cited by 28 publications

(15 citation statements)

References 11 publications

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“…The current consensus in regard to Capgras delusion is that the disorder is at least partially organic in origin. A number of case studies of Capgras patients have revealed right hemisphere lesions as well as bifrontal and bitemporal lesions (Alexander et aL, 1979;Stuss, 1990, Crichton andLewis, 1990;Cutting, 1991;Silva et aL, 1993;Stuss and Benson, 1986;.…”

Section: Are Both Left and Right Hemisphere Mechanisms Necessary For mentioning

confidence: 99%

“…Returning now to hemispheric studies related to Capgras delusion, there is considerable evidence which points to the possibility of right hemisphere involvement (Alexander et al, 1979;Benson and Stuss, 1990;Crichton and Lewis, 1990;Cutting, 1991;Silva et aL, 1993;Stuss and Benson, 1984; in Capgras dehlsion. Using computerized tomography, Alexander et aL (1979) were the first researchers to report a case of Capgras delusion clearly related to a specific neurologic lesion in the right hemisphere with predominantly frontal and temporal lobe damage.…”

Section: Hemispheric Studies Related To Capgras Delusionmentioning

confidence: 99%

“…Reviews of mild everyday impairments can be found in Burton and Bruce (1992), Cohen and Faulkner (1986), Flude et al (1989), Maylor (1990), Stanhope and Cohen (1993), and Young et aL (1985). Reviews of clinically significant face processing deficits can be found in Benton (1985), Bidault et al (1986), Bruyer (1993), Crawford et aL (1986), Ellis and Young (1990), Mendez et al (1992), and Silva et al (1993). This paper will take into account two clinically significant face processing deficits, prosopagnosia and Capgras delusion.…”

Section: Introductionmentioning

confidence: 99%

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Can we learn from the clinically significant face processing deficits, prosopagnosia and capgras delusion?

Wacholtz¹

1996

Neuropsychol Rev

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This review describes two clinically significant face processing deficits, prosopagnosia and Capgras delusion, and provides new knowledge about the face recognition process by a convergence of empirical findings. These empirical findings are structured around two questions that are reviewed from the perspectives of the two deficits. First is the question of hemispheric specificity, which inquires into the degree of each hemisphere's contribution to the face recognition process. Second is the question of dual neural pathways, which addresses the possibility that the face recognition process proceeds along two parallel pathways in the brain. Findings from the hemispheric specificity studies reinforce the current view that right hemispheric involvement is necessary for face recognition while left hemispheric involvement is minimal. Findings from the dual neural pathways studies reinforce the plausible but yet unproven hypothesis that two neural pathways pass information from the visual association cortex in the occipital lobe toward the temporal lobes and limbic system when faces are seen and recognized. These findings, which also indicate that each of the dual neural pathways carries different, nonredundant information, could be instrumental in showing that the pathways play different roles in the manifestations of the clinically significant face processing deficits, prosopagnosia and Capgras delusion.

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Section: Are Both Left and Right Hemisphere Mechanisms Necessary For mentioning

confidence: 99%

Section: Hemispheric Studies Related To Capgras Delusionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Can we learn from the clinically significant face processing deficits, prosopagnosia and capgras delusion?

Wacholtz¹

1996

Neuropsychol Rev

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“…Finally, in a recent communication Silva et al [30] gave an account of a 55-year-old man who had been shot in the head by a robber and developed left-sided hemiplegia: he displayed difficulties in recognising faces, some of which could appear distorted; he then showed symptoms of CD for his wife and became aggressive, threatening to kill her. Neuro 182 Ellis Right Hemisphere and CD imaging revealed brain loss of the right frontal lobe and right lateral ventricular enlargement.…”

Section: Studymentioning

confidence: 99%

The Role of the Right Hemisphere in the Capgras Delusion

Ellis

1994

Psychopathology

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Following a general review of the literature linking right hemisphere dysfunction to psychoses in general and Capgras delusion (CD) in particular, two studies are described that confirm the link. Study 1 revealed that, compared with matched psychiatric controls, 3 CD patients were particularly poor at matching pairs of faces shown briefly in the left visual field – which implies dysfunctioning right hemisphere performance. However there was no difference in performance when the faces appeared bilaterally, which fails to support the hypothesis that poor interhemispheric communication may give rise to CD. The second study involved tests of face memory and word memory. CD and other delusional misidentification groups scored markedly low on the face test, again implying right hemisphere deficit. Finally, a model of what may be the right hemisphere mechanism giving rise to CD was explored. This assumes two routes to face recognition, ventral and dorsal. It is argued that exclusive damage to the former may cause prosopagnosia and problems in the latter may give rise to the symptoms of CD.

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“…37 DMS generally and Capgras specifically have also been seen with right-hemisphere temporal and tempoparietal strokes 38,39 and in right-hemisphere traumatic brain injury. 40 One of the first large comparisons of primary psychiatric versus neurological DMS, which was published in 1993, 41 found some tendency toward delusions of place in dementia and delusions of person in psychiatric disorders, but with a similarity in both conditions in that the delusional content centered on objects of personal significance to the patient. Not surprisingly, the background histories were different, with psychiatric patients having had other paranoid symptoms before the onset of misidentification, and dementia patients often presenting with an initial psychosis involving misidentification.…”

Section: Commentary By David a Kahn MDmentioning

confidence: 99%

An Unusual Case of Erotomania and Delusional Misidentification Syndrome

Granstein

Strimbu²,

Francois³

et al. 2015

Journal of Psychiatric Practice

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Delusional misidentification syndromes and erotomania are rare entities, each with several distinct manifestations and no clearly defined treatment regimen. Here we expand upon an earlier literature review and describe the case of a 40-year-old woman with a history of bipolar I disorder who presented after an extended period of medication nonadherence with symptoms consistent with both of these conditions; she believed that the staff on the unit were in fact disguised celebrities and fictional characters, and she claimed to be married to a famous singer. The exact relationship of these symptoms (and indeed, even their basic etiologies) remains unclear; however, both delusional syndromes resolved with a combination of risperidone and lithium therapy. Although earlier literature has suggested pimozide as the most effective agent for treating delusional syndromes, given the more favorable side-effect profile of atypical versus typical antipsychotics, this case suggests a role for risperidone as a first-line treatment in such situations.

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Misidentification Delusions, Facial Misrecognition, and Right Brain Injury

Cited by 28 publications

References 11 publications

Can we learn from the clinically significant face processing deficits, prosopagnosia and capgras delusion?

Can we learn from the clinically significant face processing deficits, prosopagnosia and capgras delusion?

The Role of the Right Hemisphere in the Capgras Delusion

An Unusual Case of Erotomania and Delusional Misidentification Syndrome

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