Previous studies have shown that several physiological and psychological conditions, such as hyperglycemia, diabetic neuropathy, sleep apnea syndrome and depression, may cause sleep disturbances, insomnia in diabetic patients. On the other hand, epidemiological evidences are indicating that chronic partial sleep loss may increase the risk of diabetes. Laboratory studies have shown that sleep restriction is associated with an increase in sympathetic nervous activity and a decrease in insulin sensitivity without adequate compensation in beta-cell function, resulting in an impact on glucose homeostasis and an elevated risk of diabetes. Sleep curtailment is also associated with a dysregulation of the neuroendocrine control of appetite, with a reduction of the satiety factor, leptin, and an increase in hunger-promoting hormone, ghrelin. The adverse impact of sleep deprivation on energy homeostasis is likely to be driven by increased activity of neuronal populations expressing in orexin system that promotes waking, feeding and energy-expenditure.