The somnolence is a sleep disorder characterized by a tendency to fall asleep, showing evident signs of weariness or sleepiness.
Usually it is produced by the lack of sleep or tiredness. Although it can also appear as a secondary effect of some medicaments (tranquilizers, sleeping pills, antihistamines) or for pathological reasons:
- Sleep apnea.
- Alcoholic intoxication, opioid, barbiturates.
- Liver failure.
- Under-active thyroid.
- Brain tumors.
- Acute/chronic Meningitis, ETC.
Somnolence can reduce the reaction time (a critical element of safe driving). It also reduces vigilance, alertness and concentration so that the ability to perform attention-based activities (such as driving) is impaired. The speed at which information is processed and the quality of decision-making may also be affected.