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Akustische Halluzinationen und funktionelle Bildgebung [Auditory Hallucinations and Functional Imaging]

Linden, David Edmund Johannes 2008. Akustische Halluzinationen und funktionelle Bildgebung [Auditory Hallucinations and Functional Imaging]. Fortschritte der Neurologie Psychiatrie 76 (S 1) , S33-S39. 10.1055/s-2008-1038123

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Abstract

Auditory verbal hallucinations are a common symptom of schizophrenia. In general, hallucinations can affect all sensory modalities and occur in many neuropsychiatric disorders. They also serve the psychology of perception as the classic example of sensory experience in the absence of adequate external stimuli. Functional imaging studies showed the auditory cortex, the limbic system and language areas, both motor and sensory, to be active during auditory hallucinations. The psychological and neurophysiological models of hallucination can be integrated if we consider that patients with schizophrenia might ascribe internal monologues or dialogues to external sources. The activity of language areas during hallucinations would conform to such a model while the activity in auditory cortex might explain why auditory hallucinations are often so vivid and real for the patients suffering from them. Moreover, the activation of the limbic system might correspond to the emotional aspects of the content of the voices and the accompanying arousal. While the neurophysiological models of hallucination are thus already rather refined, the attempt at suppressing auditory cortex activity with repetitive transcranial magnetic stimulation in order to alleviate treatment-resistant acoustic hallucinations, which is based on the functional imaging findings, still needs further study. Treatment schemes that are based on the psychological theories are more varied and have shown more consistent and long lasting effects but also suffer from the difficulty in measuring hallucinations quantitatively. Future research with functional and structural imaging should go beyond correlating brain activity and symptoms and also address the functional and structural connectivity patterns in the brain that enable hallucinations.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Psychology
MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Uncontrolled Keywords: schizophrenia; psychopathology; tempral lobe
Language other than English: German
Publisher: Thieme Medical Publishers
ISSN: 0720-4299
Last Modified: 04 Jun 2017 03:42
URI: http://orca.cf.ac.uk/id/eprint/25167

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