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      A case of peduncular hallucinosis presenting as a primary psychiatric disorder

      case-report

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          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Peduncular hallucinosis usually occurs due to vascular or infectious midbrain lesions or brain stem compression by tumors. We present a peduncular hallucinosis case in a 63-year-old female with brain stem infarction, which can easily be misdiagnosed as a psychiatric disorder.

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          Complex visual hallucinations. Clinical and neurobiological insights.

          M Manford, F. Andermann (1998)
          Complex visual hallucinations may affect some normal individuals on going to sleep and are also seen in pathological states, often in association with a sleep disturbance. The content of these hallucinations is striking and relatively stereotyped, often involving animals and human figures in bright colours and dramatic settings. Conditions causing these hallucinations include narcolepsy-cataplexy syndrome, peduncular hallucinosis, treated idiopathic Parkinson's disease, Lewy body dementia without treatment, migraine coma, Charles Bonnet syndrome (visual hallucinations of the blind), schizophrenia, hallucinogen-induced states and epilepsy. We describe cases of hallucinosis due to several of these causes and expand on previous hypotheses to suggest three mechanisms underlying complex visual hallucinations. (i) Epileptic hallucinations are probably due to a direct irritative process acting on cortical centres integrating complex visual information. (ii) Visual pathway lesions cause defective visual input and may result in hallucinations from defective visual processing or an abnormal cortical release phenomenon. (iii) Brainstem lesions appear to affect ascending cholinergic and serotonergic pathways, and may also be implicated in Parkinson's disease. These brainstem abnormalities are often associated with disturbances of sleep. We discuss how these lesions, outside the primary visual system, may cause defective modulation of thalamocortical relationships leading to a release phenomenon. We suggest that perturbation of a distributed matrix may explain the production of similar, complex mental phenomena by relatively blunt insults at disparate sites.
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            Visual hallucinations: differential diagnosis and treatment.

            Ryan C Teeple, Jason Caplan, Theodore A Stern (2009)
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              Visual Hallucinations

              Ryan C Teeple, Jason Caplan, Theodore A Stern (2009)
              Article 0 comments Cited 18 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (nlm-ta): Ann Indian Acad Neurol
                Journal ID (iso-abbrev): Ann Indian Acad Neurol
                Journal ID (publisher-id): AIAN
                Title: Annals of Indian Academy of Neurology
                Publisher: Medknow Publications & Media Pvt Ltd (India )
                ISSN (Print): 0972-2327
                ISSN (Electronic): 1998-3549
                Publication date (Print): Oct-Dec 2013
                Volume: 16
                Issue: 4
                Pages: 684-686
                Affiliations
                [1]Department of Neurology, Bakırkoy Research and Training Hospital for Neurologic and Psychiatric Diseases, Istanbul, Turkey
                Author notes
                For correspondence: Dr. Vasfiye Burcu Dogan, Department of Neurology, Bakırkoy Research and Training Hospital for Neurologic and Psychiatric Diseases, Istanbul, Turkey. E-mail: dr_burcuvdogan@ 123456hotmail.com
                Article
                Publisher ID: AIAN-16-684
                DOI: 10.4103/0972-2327.120469
                PMC ID: 3841630
                SO-VID: c87c18d7-51ee-4acf-8bba-658e7daaec29
                Copyright © Copyright: © Annals of Indian Academy of Neurology
                License:

                This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                Date received : 06 January 2013
                Date revision received : 27 March 2013
                Date accepted : 21 April 2013
                Categories
                Subject: Case Report

                ScienceOpen disciplines: Neurology
                Keywords: midbrain,peduncular hallucinosis,cerebrovascular accident
                Data availability:
                ScienceOpen disciplines: Neurology
                Keywords: midbrain, peduncular hallucinosis, cerebrovascular accident

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