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Related Experiment Videos

Essential startle disease may not be a uniform entity.

B Cengiz1, Z Odabasi, F Ozdag

  • 1Department of Neurology, Gulhane Military Medical School, Ankara, Turkey.

Clinical EEG (Electroencephalography)
|May 22, 2001
PubMed
Summary

This case study reports on a 25-year-old man with essential startle disease, characterized by a pathological startle reflex and early habituation of motor responses. Unlike hereditary forms, this patient

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Area of Science:

  • Neurology
  • Neurophysiology

Background:

  • Essential startle disease, also known as hyperekplexia, is a rare neurological disorder.
  • Characterized by an exaggerated startle response to various stimuli.
  • Often presents in infancy but can manifest later.

Observation:

  • A 25-year-old man presented with a lifelong history of sudden jerks and falls triggered by unexpected stimuli.
  • Physical examination revealed hyperreflexia and a pathologic startle reflex elicited by various stimuli.
  • Electroencephalogram (EEG) showed spikes preceding muscle artifacts in response to startle stimuli.

Findings:

  • The patient exhibited early disease onset and rapid habituation of motor responses to auditory stimuli within 2-4 trials.
  • Cortical long loop reflex (C reflex) was consistently elicited, but giant cortical somatosensory evoked potentials were absent.

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  • The patient's clinical presentation differed significantly from typical hereditary hyperekplexia phenotypes.

    • Implications:

    • This case highlights a distinct phenotype of essential startle disease with early onset and unique response habituation.
    • Understanding these variations is crucial for accurate diagnosis and differentiating from hereditary forms of hyperekplexia.
    • Further research may elucidate the specific pathophysiological mechanisms underlying this variant presentation.