Sleep plays an important role in the glands that regulate mood and stress functions in the body. Scientific studies indicate that sleep deprivation has a negative effect on the pituitary gland. This gland is senior to many others including the adrenal glands which secrete cortisol (the stress hormone).
Lack of sleep will negatively affect your mental abilities and emotional state. You are far more likely to be irritable and prone to mood swings. It will also slow you down and inhibit decision-making processes and ability to produce creative thought.
Prolonged sleep deprivation
If the lack of sleep goes on for too long then mental health disorders including anxiety, depression, impulsive behavior, paranoia and suicidal thoughts can be triggered.