Reevaluating spells initially identified as cataplexy

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Background and purpose: Cataplexy, transient episodes of bilateral muscle weakness with areflexia provoked by emotions, is a state highly specific to narcolepsy. Cataplexy is diagnosed based on clinical interview. Two screening tools have been developed recently but their usefulness has been limited because of length or current lack of psychometric data. Used effectively even these screening tests require the interpreting physician to have an understanding of the typical features of cataplexy. Most physicians encounter patients with cataplexy fairly infrequently, making it difficult to gain proficiency in detecting cataplexy based on clinical interview alone. Relatively little attention has been given to the differential diagnosis of cataplexy, which increases the likelihood of unnecessary sleep testing or false positive diagnosis. Patients and methods: This case series describes six cases where cataplexy was initially diagnosed. In all cases the weakness spells were eventually not attributed to cataplexy. The presentation and characteristics of these cases will be presented as a means to discuss the differential diagnosis of cataplexy. Results: These cases represent a diverse set of medical disorders including bradycardia, migraine, delayed sleep phase syndrome, conversion disorder, malingering and a chronic psychotic disorder. Conclusions: A more in-depth understanding of the classic features of cataplexy should improve recognition of this fascinating state. Improved cataplexy recognition will enhance the appropriate usage of sleep tests and eventually increase the timeliness and accuracy of the diagnosis of narcolepsy with cataplexy.

Original languageEnglish (US)
Pages (from-to)537-542
Number of pages6
JournalSleep Medicine
Volume6
Issue number6
DOIs
StatePublished - Nov 2005

Fingerprint

Cataplexy
Narcolepsy
Sleep
Differential Diagnosis
Circadian Rhythm Sleep Disorders
Interviews
Malingering
Conversion Disorder
Physicians
Muscle Weakness
Bradycardia
Migraine Disorders
Psychometrics
Psychotic Disorders

Keywords

  • Cataplexy
  • Conversion disorder
  • Narcolepsy
  • Polysomnography
  • Sleep

ASJC Scopus subject areas

  • Dentistry(all)
  • Ophthalmology
  • Pulmonary and Respiratory Medicine
  • Neurology

Cite this

Reevaluating spells initially identified as cataplexy. / Krahn, Lois Elaine.

In: Sleep Medicine, Vol. 6, No. 6, 11.2005, p. 537-542.

Research output: Contribution to journalArticle

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