- Familial Hyperekplexia, a Potential Cause of Cautious Gait: A New Korean Case and a Systematic Review of Phenotypes
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Yoonju Lee, Nan Young Kim, Sangkyoon Hong, Su Jin Chung, Seong Ho Jeong, Phil Hyu Lee, Young H. Sohn
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J Mov Disord. 2017;10(1):53-58. Published online December 27, 2016
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DOI: https://doi.org/10.14802/jmd.16044
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 Abstract
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- Familial hyperekplexia, also called startle disease, is a rare neurological disorder characterized by excessive startle responses to noise or touch. It can be associated with serious injury from frequent falls, apnea spells, and aspiration pneumonia. Familial hyperekplexia has a heterogeneous genetic background with several identified causative genes; it demonstrates both dominant and recessive inheritance in the α1 subunit of the glycine receptor (GLRA1), the β subunit of the glycine receptor and the presynaptic sodium and chloride-dependent glycine transporter 2 genes. Clonazepam is an effective medical treatment for hyperekplexia. Here, we report genetically confirmed familial hyperekplexia patients presenting early adult cautious gait. Additionally, we review clinical features, mode of inheritance, ethnicity and the types and locations of mutations of previously reported hyperekplexia cases with a GLRA1 gene mutation.
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Citations
Citations to this article as recorded by  - Hyperekplexia: A Single-Center Experience
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Journal of Child Neurology.2024; 39(7-8): 260. CrossRef - Hereditary hyperekplexia: a new family and a systematic review of GLRA1 gene-related phenotypes
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Journal of Clinical Neurology.2020; 16(2): 230. CrossRef - C.292G>A, a novel glycine receptor alpha 1 subunit gene (GLRA1) mutation found in a Chinese patient with hyperekplexia
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Medicine.2020; 99(17): e19968. CrossRef - Hyperekplexia and other startle syndromes
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Journal of the Neurological Sciences.2020; 416: 117051. CrossRef - Clinical features and genetic analysis of two siblings with startle disease in an Italian family: a case report
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BMC Medical Genetics.2017;[Epub] CrossRef
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