Serial polysomnography in hypnic headache.
Summary of "Serial polysomnography in hypnic headache."
Background: Hypnic headache (HH) is a rare primary headache disorder characterized by strictly sleep-related headache attacks. Most patients are over the age of 50 and usually awake at the same time at night with dull bilateral head pain. The pathophysiology of this headache disorder is still enigmatic but association with rapid eye movement (REM) sleep and sleep-disordered breathing (SDB) has been suggested.Methods: Six patients with HH according to the current International Classification of Headache Disorders (ICHD-II) criteria (code 4.5) were investigated. Serial polysomnography (PSG) was performed in each patient for four consecutive nights.Results: A total of 22 HH attacks were recorded from all patients during PSG. Six of the monitored headache attacks arose from REM sleep; 16 attacks, however, arose from different non-REM (NREM) sleep stages. Five patients showed an increased apnoea/hypopnoea index (>5), indicating obstructive sleep apnoea (OSA) on some but not the majority of nights. Headache onset and occurrence of SDB were not temporally connected.Conclusions: This prospective study shows that the onset of HH was not associated with sleep stage. These results contradict the current belief that REM sleep and SDB play a crucial role in the pathophysiology of HH.
University of Duisburg-Essen, Germany.
This article was published in the following journal.
Name: Cephalalgia : an international journal of headache
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20699335
- DOI: http://dx.doi.org/10.1177/0333102410381146
Medical and Biotech [MESH] Definitions
Various conditions with the symptom of HEADACHE. Headache disorders are classified into major groups, such as PRIMARY HEADACHE DISORDERS (based on characteristics of their headache symptoms) and SECONDARY HEADACHE DISORDERS (based on their etiologies). (International Classification of Headache Disorders, 2nd ed. Cephalalgia 2004: suppl 1)
Headache Disorders, Primary
Conditions in which the primary symptom is HEADACHE and the headache cannot be attributed to any known causes.
A common primary headache disorder, characterized by a dull, non-pulsatile, diffuse, band-like (or vice-like) PAIN of mild to moderate intensity in the HEAD; SCALP; or NECK. The subtypes are classified by frequency and severity of symptoms. There is no clear cause even though it has been associated with MUSCLE CONTRACTION and stress. (International Classification of Headache Disorders, 2nd ed. Cephalalgia 2004: suppl 1)
Secondary headache attributed to TRAUMA of the HEAD and/or the NECK.
A primary headache disorder that is characterized by severe, strictly unilateral PAIN which is orbital, supraorbital, temporal or in any combination of these sites, lasting 15-180 min. occurring 1 to 8 times a day. The attacks are associated with one or more of the following, all of which are ipsilateral: conjunctival injection, lacrimation, nasal congestion, rhinorrhea, facial SWEATING, eyelid EDEMA, and miosis. (International Classification of Headache Disorders, 2nd ed. Cephalalgia 2004: suppl 1)
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