Introduction Capgras syndrome (CS) is characterized by a delusional belief that one or few highly familiar people have been replaced by impostors who are physically very similar to the original/s. Reduplicative paramnesia of places (RP) is characterized by a delusional that place or location has been duplicated, existing in two or more places simultaneously. CS e RP were traditionally considered to have their origins in psychodynamic conflict, but following the description of many cases with organic aetiology, many potential neuropsychological basis have been suggested. The present study aims to clarify this issue by exploring different neuropsychological variables. Materials and Methods This study included 14 patients with Lewy body Dementia, 14 patients with Alzheimer’s Disease (AD), and 14 healthy individuals. Two experimental works have been performed: the survey on CS, the LBD group consisted of 8 patients with CS and 6 without this syndrome; the survey on PR, the LBD group consisted of 7 patients with PR and 7 without this syndrome. The battery (tests with faces designed for the investigation of the CS, and with buildings for the investigation of the PR) explored different neuropsychological domains: Perceptual ability: it was examined using tests of gender identity, age identification, perceptual discrimination of faces, buildings matching in the same perspective, buildings matching in different perspective. Familiarity recognition: it was examined using tests of familiar faces recognition, famous faces recognition, familiar buildings recognition (exterior), familiar buildings recognition (interior). Recognition of face emotions: it was examined using test of emotion matching. Results Patients with LBD, with CS and PR, commit more errors in assigning familiarity with the faces and buildings (statistically significant) compared with subjects with LBD without these syndromes. In contrast, there were no significant differences in the performance of patients with LBD with CS and PR, respectively, compared to those without delusions, in tests that explore visual perceptual skills and recognition of emotions of the face. Discussion This finding allows to posit that the potential basis for CP and RP, lies in an impairment of familiarity attribution.
Introduzione La sindrome di Capgras (CS) è caratterizzata dalla ferma convinzione che una o più persone familiari, siano state sostituite da impostori, che sono fisicamente molto simili all’originale. La paramnesia reduplicativa per i luoghi (RP) è caratterizzata dalla convinzione che un luogo sia stato duplicato, esistendo contemporaneamente in due luoghi. CS e RP, sono state tradizionalmente considerate come il risultato di un conflitto psicodinamico, ma in seguito alla descrizione di numerosi casi ad eziologia organica, sono state ipotizzate basi neuropsicologiche. Il presente studio si propone di chiarire tali ipotesi approfondendo i diversi domini neuropsicologici. Materiali e Metodi Sono stati inclusi 14 pazienti affetti da Demenza con corpi di Lewy (LBD), 14 pazienti con Malattia di Alzheimer (AD), e 14 soggetti di controllo esenti da patologie neuro-psichiatriche. Sono stati eseguiti due lavori sperimentali: nell’indagine sulla CS, il gruppo LBD era formato da 8 pazienti con CS e 6 privi di tale sindrome., nell’indagine sulla PR, il gruppo LBD era formato da 7 pazienti con PR e 7 privi di tale sindrome. La batteria costruita (prove con i volti per l’indagine sulla CS e prove con gli edifici per la PR) esplora differenti domini neuropsicologici: Abilità percettive: analizzate attraverso i test di identificazione di genere, identificazione di età, discriminazione percettiva di volti, associazione di edifici nella stessa prospettiva, associazione di edifici in prospettiva diversa. Riconoscimento di familiarità: analizzato attraverso i test di riconoscimento di volti familiari, discriminazione di volti famosi, riconoscimento di edifici familiari (esternamente), riconoscimento di edifici familiari (internamente). Riconoscimento di emozioni del volto (solo per l’indagine sulla CS): studiato attraverso il test di associazione di emozioni. Risultati I pazienti affetti da LBD con CS e PR, rispetto ai soggetti con LBD privi di tali sindromi, commettono più errori nell’assegnare la familiarità ai volti ed edifici. (differenza statisticamente significativa). Diversamente, non sono state riscontrate differenze significative nelle prestazioni dei soggetti affetti da LBD con CS e PR, rispetto ai soggetti privi di deliri, nelle prove che esplorano le abilità visuopercettive e il riconoscimento di emozioni del volto. Discussione Questi risultati consentono di ipotizzare che le basi cognitive della CS e della RP sono da ricondurre ad una compromissione di attribuzione della familiarità.
Correlati neurocognitivi della Sindrome di Capgras e della paramnesia reduplicativa per i luoghi / Damora, Alessio. - (2012 Feb 22).
Correlati neurocognitivi della Sindrome di Capgras e della paramnesia reduplicativa per i luoghi
DAMORA, ALESSIO
2012-02-22
Abstract
Introduction Capgras syndrome (CS) is characterized by a delusional belief that one or few highly familiar people have been replaced by impostors who are physically very similar to the original/s. Reduplicative paramnesia of places (RP) is characterized by a delusional that place or location has been duplicated, existing in two or more places simultaneously. CS e RP were traditionally considered to have their origins in psychodynamic conflict, but following the description of many cases with organic aetiology, many potential neuropsychological basis have been suggested. The present study aims to clarify this issue by exploring different neuropsychological variables. Materials and Methods This study included 14 patients with Lewy body Dementia, 14 patients with Alzheimer’s Disease (AD), and 14 healthy individuals. Two experimental works have been performed: the survey on CS, the LBD group consisted of 8 patients with CS and 6 without this syndrome; the survey on PR, the LBD group consisted of 7 patients with PR and 7 without this syndrome. The battery (tests with faces designed for the investigation of the CS, and with buildings for the investigation of the PR) explored different neuropsychological domains: Perceptual ability: it was examined using tests of gender identity, age identification, perceptual discrimination of faces, buildings matching in the same perspective, buildings matching in different perspective. Familiarity recognition: it was examined using tests of familiar faces recognition, famous faces recognition, familiar buildings recognition (exterior), familiar buildings recognition (interior). Recognition of face emotions: it was examined using test of emotion matching. Results Patients with LBD, with CS and PR, commit more errors in assigning familiarity with the faces and buildings (statistically significant) compared with subjects with LBD without these syndromes. In contrast, there were no significant differences in the performance of patients with LBD with CS and PR, respectively, compared to those without delusions, in tests that explore visual perceptual skills and recognition of emotions of the face. Discussion This finding allows to posit that the potential basis for CP and RP, lies in an impairment of familiarity attribution.File | Dimensione | Formato | |
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