Seasonal affective disorder

Symptoms:

• depression with a fall or winter onset
• lack of energy
• decreased interest in work or significant activities
• increased appetite with weight gain
• carbohydrate cravings
• increased sleep, excessive daytime sleepiness
• social withdrawal
• afternoon slumps with decreased energy and concentration
• slow, sluggish, lethargic movement

Signs and tests:

A psychological evaluation rules out other causes for the symptoms and confirms the diagnosis.