J Korean Pediatr Soc.  2002 Oct;45(10):1283-1287.

A Case Report of Congenital Hyperekplexia in Twin

Affiliations
  • 1Department of Pediatrics, College of Medicine, Pusan National University, Busan, Korea. pse0731@hanmail.net

Abstract

Hyperekplexia or startle disease is a hereditary neurological disorder characterized by an abnormally exaggerated startle response to tactile, auditory and visual stimuli, together with a global muscular hypertonia and hyperactive tendon reflexes. This disease is a rare, genetically determined disorder, with an autosomal dominant inheritance with variable expression, first described by Suhren, et al. We report two cases of familial hyperekplexia, who developed hypertonia and pathologic startle response to tactile stimulation in the immediate neonatal period. The infant showed a marked improvement of the startle response and muscular hypertonia with low-dose clobazam.

Keyword

Hyperekplexia; Hypertonia; Startle disease; Clobazam

MeSH Terms

Humans
Infant
Nervous System Diseases
Reflex, Stretch
Stiff-Person Syndrome*
Twins*
Wills
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