| Latah: An Indonesian Startle Syndrome. | |
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MedLine Citation:
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PMID: 23283702 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The nature of culture-specific startles syndromes such as "Latah" in Indonesia and Malaysia is ill understood. Hypotheses concerning their origin include sociocultural behavior, psychiatric disorders, and neurological syndromes. The various disorders show striking similarities despite occurring in diverse cultural settings and genetically distant populations. They are characterized clinically by exaggerated startle responses and involuntary vocalizations, echolalia, and echopraxia. Quantifying startle reflexes may help define Latah within the 3 groups of startle syndromes: (1) hyperekplexia, (2) startle-induced disorders, and (3) neuropsychiatric startle syndromes. Twelve female Latah patients (mean age, 44.6 years; SD, 7.7 years) and 12 age-, sex- and socioeconomically matched controls (mean age, 42.3 year; SD, 8.0) were studied using structured history taking and neurological examination including provocation of vocalizations, echolalia, and echopraxia. We quantified auditory startle reflexes with electromyographic activity of 6 left-sided muscles following 104-dB tones. We defined 2 phases for the startle response: a short latency motor startle reflex initiated in the lower brain stem <100/120 ms) and a later, second phase more influenced by psychological factors (the "orienting reflex," 100/120-1000 ms after the stimulus). Early as well as late motor startle responses were significantly increased in patients compared with controls (P ≤ .05). Following their startle response, Latah patients showed stereotyped responses including vocalizations and echo phenomena. Startle responses were increased, but clinically these proved insignificant compared with the stereotyped behavioral responses following the startle response. This study supports the classification of Latah as a "neuropsychiatric startle syndrome." © 2012 Movement Disorder Society. |
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Authors:
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Mirte J Bakker; J Gert van Dijk; Astuti Pramono; Sri Sutarni; Marina A J Tijssen |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-1-2 |
Journal Detail:
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Title: Movement disorders : official journal of the Movement Disorder Society Volume: - ISSN: 1531-8257 ISO Abbreviation: Mov. Disord. Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-1-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8610688 Medline TA: Mov Disord Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 Movement Disorders Society. |
Affiliation:
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Department of Neurology and Clinical Neurophysiology, Academic Medical Centre, University of Amsterdam, Amsterdam, the Netherlands; Department of Clinical and Health Psychology, University of Utrecht, Utrecht, the Netherlands. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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