Sleep is an important and essential aspect of life and we spend about one third of our lives sleeping. Sleep disorders often manifest with insomnia and excessive daytime sleepiness. Large population based studies have shown that people who sleep longer and lesser have shorter life span1,2. Other symptoms of the slep disorders include snoring, abnormal motor behaviors etc.
Khealani, Bhojo A.
"Sleep medicine: a deserted field in Pakistan,"
Pakistan Journal of Neurological Sciences (PJNS): Vol. 11
, Article 1.
Available at: http://ecommons.aku.edu/pjns/vol11/iss4/1