Neurology 2002;58:1019-1024
© 2002 American Academy of Neurology
Parkinsons disease and sleepiness
An integral part of PD
I. Arnulf, MD,
E. Konofal, MD,
M. MerinoAndreu, MD,
J. L. Houeto, MD,
V. Mesnage, MD,
M. L. Welter, MD,
L. Lacomblez, MD,
J. L. Golmard, MD PhD,
J. P. Derenne, MD and
Y. Agid, MD PhD
From Fédération des Pathologies du Sommeil (Drs. Arnulf, Konofal, MerinoAndreu, and Derenne), Centre dInvestigation Clinique, Fédération de Neurologie and Inserm U289 (Drs. Houeto, Mesnage, Welter, and Agid), Service de Neuropharmacologie (Dr. Lacomblez), and Service dInformatique Médicale (Dr. Golmard), Hôpital PitiéSalpêtrière, Assistance Publique-Hôpitaux de Paris, France.
Address correspondence and reprint requests to Dr. Isabelle Arnulf, Pavillon Rambuteau, Hôpital PitiéSalpêtrière, 47-83 Boulevard de lHôpital, 75651 Paris Cedex 13, France; e-mail: isabelle.arnulf{at}psl.ap-hop-paris.fr
Objective: To investigate the potential causes of excessive daytime sleepiness in patients with PDpoor sleep quality, abnormal sleepwakefulness control, and treatment with dopaminergic agents.
Methods: The authors performed night-time polysomnography and daytime multiple sleep latency tests in 54 consecutive levodopa-treated patients with PD referred for sleepiness, 27 of whom were also receiving dopaminergic agonists.
Results: Sleep latency was 6.3 ± 0.6 minutes (normal >8 minutes), and the Epworth Sleepiness score was 14.3 ± 4.1 (normal <10). A narcolepsy-like phenotype ( 2 sleep-onset REM periods) was found in 39% of the patients, who were sleepier (4.6 ± 0.9 minutes) than the other 61% of patients (7.4 ± 0.7 minutes). Periodic leg movement syndromes were rare (15%, range 16 to 43/h), but obstructive sleep apneahypopnea syndromes were frequent (20% of patients had an apneahypopnea index >15/h; range 15.1 to 50.0). Severity of sleepiness was weakly correlated with Epworth Sleepiness score (r = -0.34) and daily dose of levodopa (r = 0.30) but not with dopamine-agonist treatment, age, disease duration, parkinsonian motor disability, total sleep time, periodic leg movement, apneahypopnea, or arousal indices.
Conclusions: In patients with PD preselected for sleepiness, severity of sleepiness was not dependent on nocturnal sleep abnormalities, motor and cognitive impairment, or antiparkinsonian treatment. The results suggest that sleepinesssudden onset of sleepdoes not result from pharmacotherapy but is related to the pathology of PD.
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