Sleep and Sleeplessness

active apparatus automatic system awake blood body brain broiled cause of sleeplessness causes of sleep cerebral centres cerebral sleep cerebrum chloroform circulation commonly condition conduce to sleep consciousness cure digestion disease disorderly distress disturbed dozing dream drugs effect essen established excitement exer exercise exhaustion experience fact fatigue formed a habit function of sleeping going to sleep habit of sleeping head heart's action inaction induced influence irregular irritation labour less light sleepers matter meal ment mental and physical Mind Troubles morbid muscles muscular system natural habit natural sleep nerve centres nervous system ness night nutrition obstacles to sleep occurs organs oxygen pain perfect sleep perform persons physico-mental physiology posi prevent sleep quiescence quires red corpuscles relief remedy repose rest rhythmical sense sense-organs sensitive skin sleepers soporifics stomach stupor sub-consciousness sufferer supply sympathetic system symptom thought tion tissues vessels viscus wakefulness weariness worry yawning