Repeated visual hallucinations in Parkinson's disease as disturbed external/internal perceptions: Focused review and a new integrative model
Identifieur interne : 000375 ( Istex/Corpus ); précédent : 000374; suivant : 000376Repeated visual hallucinations in Parkinson's disease as disturbed external/internal perceptions: Focused review and a new integrative model
Auteurs : Nico J. Diederich ; Christopher G. Goetz ; Glenn T. StebbinsSource :
- Movement Disorders [ 0885-3185 ] ; 2005-02.
English descriptors
Abstract
Visual hallucinations (VH) in Parkinson's disease (PD) are a chronic complication in 30 to 60% of treated patients and have a multifaceted phenomenology. Flickering, faultive impressions, and illusionary misperceptions precede the core syndrome of stereotyped, colorful images. The patient variably recognizes these images as hallucinations, being rarely irritated or frightened and more often amused as a bystander. Although studies on VH in PD focus on several research domains, no comprehensive, unified theory has been developed to study their pathophysiology. We have adapted Hobson's work on the states of consciousness and propose a model integrating seemingly disparate data on VH. We suggest that VH should be considered as a dysregulation of the gating and filtering of external perception and internal image production. Contributive elements and anatomical links for the model include poor primary vision, reduced activation of primary visual cortex, aberrant activation of associative visual and frontal cortex, lack of suppression or spontaneous emergence of internally generated imagery through the ponto‐geniculo‐occipital system, intrusion of rapid eye movement dreaming imagery into wakefulness, errative changes of the brainstem filtering capacities through fluctuating vigilance, and medication‐related overactivation of mesolimbic systems. Different etiologies likely produce different phenomenologies and the prognosis may not be uniform. This new conceptual framework permits an anatomical view of VH and suggests new, testable hypotheses regarding their pathophysiology and therapy. © 2004 Movement Disorder Society
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DOI: 10.1002/mds.20308
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<abstract lang="en">Visual hallucinations (VH) in Parkinson's disease (PD) are a chronic complication in 30 to 60% of treated patients and have a multifaceted phenomenology. Flickering, faultive impressions, and illusionary misperceptions precede the core syndrome of stereotyped, colorful images. The patient variably recognizes these images as hallucinations, being rarely irritated or frightened and more often amused as a bystander. Although studies on VH in PD focus on several research domains, no comprehensive, unified theory has been developed to study their pathophysiology. We have adapted Hobson's work on the states of consciousness and propose a model integrating seemingly disparate data on VH. We suggest that VH should be considered as a dysregulation of the gating and filtering of external perception and internal image production. Contributive elements and anatomical links for the model include poor primary vision, reduced activation of primary visual cortex, aberrant activation of associative visual and frontal cortex, lack of suppression or spontaneous emergence of internally generated imagery through the ponto‐geniculo‐occipital system, intrusion of rapid eye movement dreaming imagery into wakefulness, errative changes of the brainstem filtering capacities through fluctuating vigilance, and medication‐related overactivation of mesolimbic systems. Different etiologies likely produce different phenomenologies and the prognosis may not be uniform. This new conceptual framework permits an anatomical view of VH and suggests new, testable hypotheses regarding their pathophysiology and therapy. © 2004 Movement Disorder Society</abstract>
<subject lang="en"><genre>Keywords</genre>
<topic>Parkinson's disease</topic>
<topic>hallucinations</topic>
<topic>REM sleep</topic>
<topic>vision</topic>
<topic>Charles Bonnet syndrome</topic>
</subject>
<relatedItem type="host"><titleInfo><title>Movement Disorders</title>
<subTitle>Official Journal of the Movement Disorder Society</subTitle>
</titleInfo>
<titleInfo type="abbreviated"><title>Mov. Disord.</title>
</titleInfo>
<subject><genre>article category</genre>
<topic>Research Review</topic>
</subject>
<identifier type="ISSN">0885-3185</identifier>
<identifier type="eISSN">1531-8257</identifier>
<identifier type="DOI">10.1002/(ISSN)1531-8257</identifier>
<identifier type="PublisherID">MDS</identifier>
<part><date>2005</date>
<detail type="volume"><caption>vol.</caption>
<number>20</number>
</detail>
<detail type="issue"><caption>no.</caption>
<number>2</number>
</detail>
<extent unit="pages"><start>130</start>
<end>140</end>
<total>11</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">487E07F6856B36CB3DAA722F2DDDF0C21A7B0485</identifier>
<identifier type="DOI">10.1002/mds.20308</identifier>
<identifier type="ArticleID">MDS20308</identifier>
<accessCondition type="use and reproduction" contentType="copyright">Copyright © 2004 Movement Disorder Society</accessCondition>
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<recordContentSource>WILEY</recordContentSource>
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