Physiology of Sleep
Loss of consciousness leads to decreased response depth of sleep is not constant throughout the sleeping period. physiological changes during sleep during sleep, most of the body functions are plasma volume plasma volume decreases by about 10% during if sleep is disturbed by exciting dreams, respiration becomes irregular and cheyne-stokes gastric secretion is not altered
Or may be increased slightly. there is a characteristic cycle of brain wave electrical activity in the brain varies with stages of sleep. non-rapid eye movement sleep, nrem sleep or non-rem sleep. during rem sleep, electroencephalogram (eeg) non-rapid eye movement sleep the nrem sleep is divided into four stages, when the person proceeds to drowsy state, the alpha
Waves diminish. eeg shows only low voltage fluctuations and infrequent delta waves. at a frequency of 14 per second, superimposed by low voltage delta waves. frequency of delta waves decreases to 1 or sleep occurs due to the activity of some sleep-inducing damage of sleep centers results in sleeplessness sleep centers complex pathways between the reticular formation
It occurs because of lesion in the floor of hypersomnia also occurs in endocrine disorders sleep apnea syndrome sleep apnea is the temporary stoppage of breathing force of respiration during rem sleep with short apneic episode. apnea is due to decreased stimulation of respiratory airway obstruction or the combination of all these factors. is characterized by a sense of
Extreme uneasiness discomfort is felt as of some heavy weight after a period of extreme anxiety, the subject nightmare occurs due to improper food intake,digestive it also occurs during drug withdrawal or alcohol withdrawal. it is also called walking during sleep or nocturnal enuresis nocturnal enuresis is the involuntary voiding sleep start or hypnic jerk is the common
Movement disorder during sleep. sleep start is a physiological form of clonus
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Physiology of Sleep Explained By Medico in DNA
