Treating sleep apnea may lessen depression, too | Reuters

(Reuters Health) For people with depression and obstructive sleep apnea, using a nightly device to improve breathing while asleep may also improve depression symptoms, according to a new review of the evidence.

Its thought that sleep apnea could contribute to depression through its effects on sleep quality as sleep fragmentation occurs from the frequent apnea events, but this hasn't been proven experimentally, said lead author Dr. Marcus Povitz of Western University in London, Ontario, Canada.

Also there is a hypothesis that the dips in oxygen due to the apneas might cause injury to the brain which could lead to depression, Povitz told Reuters Health by email.