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Titolo:
Auditory verbal hallucinations and dysfunction of the neural substrates ofspeech
Autore:
Stephane, M; Barton, S; Boutros, NN;
Indirizzi:
Univ Minnesota, Dept Psychiat, Vet Adm Med Ctr, Minneapolis, MN 55417 USA Univ Minnesota Minneapolis MN USA 55417 ed Ctr, Minneapolis, MN 55417 USA Yale Univ, Dept Psychiat, VA Connecticut Hlth Care Syst, W Haven, CT 06516USA Yale Univ W Haven CT USA 06516 ticut Hlth Care Syst, W Haven, CT 06516USA Johns Hopkins Med Inst, Dept Psychiat, Baltimore, MD 21287 USA Johns Hopkins Med Inst Baltimore MD USA 21287 at, Baltimore, MD 21287 USA
Titolo Testata:
SCHIZOPHRENIA RESEARCH
fascicolo: 1-2, volume: 50, anno: 2001,
pagine: 61 - 78
SICI:
0920-9964(20010530)50:1-2<61:AVHADO>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
CEREBRAL BLOOD-FLOW; POSITRON EMISSION TOMOGRAPHY; PLANUM TEMPORALE ASYMMETRY; FIRST-EPISODE SCHIZOPHRENIA; MISMATCH NEGATIVITY; ALZHEIMERS-DISEASE; THOUGHT-DISORDER; SINGLE SUBJECTS; CORTEX; LOBE;
Keywords:
auditory verbal hallucinations; inner speech; schizophrenia; speech; subvocal speech;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
115
Recensione:
Indirizzi per estratti:
Indirizzo: Stephane, M Univ Minnesota, Dept Psychiat, Vet Adm Med Ctr, 1 Vet Dr, Minneapolis, MN 55417 USA Univ Minnesota 1 Vet Dr Minneapolis MN USA 55417 MN 55417 USA
Citazione:
M. Stephane et al., "Auditory verbal hallucinations and dysfunction of the neural substrates ofspeech", SCHIZOPHR R, 50(1-2), 2001, pp. 61-78

Abstract

Objective: to evaluate the neural substrate of auditory verbal hallucinations (AVH), the correlation between AVH and subvocal speech (hereafter SVS),and the relationship between speech and AVH. Method: we reviewed the papers found by an electronic literature search on hallucinations and speech. The review was extended to the papers cited in these publications and to classical works. Results: there is no conclusive evidence of structural abnormality of the speech perception area in hallucinating schizophrenic patients. However there is evidence of electrophysiological abnormalities: of the auditory and speech perception cortices. Functional imaging data are inconsistent, yet point to the left superior temporal gyrus as one of the neural substrates for AVH. There is also evidence that SVS could accompany the experience of AVH. Conclusion: there is evidence that dysfunction of brain areasresponsible for speech generation is a fundamental mechanism for generating AVH in schizophrenia. It results in a secondary activation of Wernicke's area (speech perception) and Broca's area (speech expression). The first leading to the experience of hallucinations, and the second, eventually, gives rise to a variable degree of vocal muscle activity detectable by EMG, and/or faint vocalizations detectable by sensitive microphones placed at proximity of the larynx. Direct stimulation or disease of Wernicke's area produces AVH without SVS. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 06:29:46