Sleep is a function of the brain and a behaviour vital to the survival of all mammals. There is no single region of the brain, single neurotransmitter, or single neural pathway that is dedicated to sleep and wakefulness. Recently I completed an online course through University of Michigan on Sleep: Neurobiology, Medicine and Society. It was such a well run course hosted through Coursera. I learnt so much about the importance of sleep, how sleep works and it made me think one thing over and over again “How closely does sleep related to chronic pain disorders?”