Sleep complaints in periodic paralyses: a web survey

Area of Science:

• Neurology
• Sleep Medicine
• Genetics

Background:

• Neuronal potassium conductance impacts sleep-wake cycles and REM sleep.
• Periodic Paralysis (PP) involves muscle weakness linked to serum potassium changes, suggesting altered neuronal potassium conductance.
• Sleep disturbances are common but not well-characterized in PP patients.

Purpose of the Study:

• To investigate sleep quality and disturbances in individuals with Periodic Paralysis (PP).
• To compare sleep patterns in PP patients with control groups, including those with depression and healthy individuals.
• To explore potential links between PP, potassium conductance, and sleep abnormalities.

Main Methods:

• A sleep questionnaire was administered to members of the Periodic Paralysis International Listserv.
• Three control groups were included: untreated depression, treated depression, and healthy subjects.
• Data analysis focused on self-reported sleep quality, awakenings, daytime sleepiness, hallucinations, and dreams.

Main Results:

• PP subjects and those with untreated depression reported more frequent insufficient sleep quality and nocturnal awakenings than treated depression patients and healthy controls.
• PP subjects experienced increased daytime sleepiness, sleep-related hallucinations, and nightmares/abnormal dreams compared to all control groups.
• Abnormal dreams in PP may relate to nocturnal paralysis episodes, while hallucinations could stem from enhanced REM sleep due to altered potassium conductance.

Conclusions:

• Patients with Periodic Paralysis exhibit disrupted sleep architecture and homeostasis.
• Sleep disturbances in PP may be associated with alterations in neuronal potassium conductance.
• Further research is warranted to elucidate the mechanisms underlying sleep abnormalities in PP.