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Wikipedia definition
1. HyperekplexiaHyperekplexia (literally means "exaggerated surprise") is a neurologic disorder classically characterised by pronounced startle responses to tactile or acoustic stimuli and hypertonia. The hypertonia may be predominantly truncal, attenuated during sleep and less prominent after a year of age. Hyperekplexia has been linked to genetic defects in a number of different gene families, all of which play an important role in glycine neurotransmission.
Read “Hyperekplexia” on English Wikipedia
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Read “Hyperekplexia” on DBpedia

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