Vermont Public Radio speaks with Dr Michael Sateia, professor emeritus of psychiatry and sleep medicine at the Geisel School of Medicine at Dartmouth about the causes of sleeplessness, insomnia, and sleep apnea, and their profound effects.

Tossing and turning all night, or drowsiness caused by staying up to play World of Warcraft too long into the night, might seem like mild irritants. But the consequences of lack of sleep can be much more dire.