How much sleep does an average individual need?
Ans.The criteria for adequate sleep are arbitrary. Most adults sleep for six to ten hours per night, with an average of eight hours. Six and a half hours of sleep time with cut off points of 15 to 20 minutes of latency is suggested by the International Classification of Sleep Disorders (ICSD). A sleep of less than four hours or more than ten hours is generally associated with sleep disorders. The need for sleep changes with increase in age and varies with each person. Regardless of where the exact line is drawn, patients with the diagnosis of sleep state misperception will gradually shade into the category of psychophysiological insomnia.
