In the first stage of sleep, theta waves dominate to Melaluna Sleep Aid Supplement Review a great extent. These waves are slow in frequency and high in amplitude. In this stage the sleeper relaxes the muscle, breathes slowly and deeply and rolls the eyes slowly. This is further followed by frequent movement of limb that lasts for about 10 minutes.
As the sleep continues to move to the second stage, theta waves become more synchronous and consistent. The duration of the second stage of sleep lasts for nearly 10 to 20 minutes. The characteristics of first two stages of the sleep are fairly light. Psychiatrists call this as transitional periods.
In the third stage, the entire muscles of the body are paralyzed. The body revitalizes itself by replenishing damaged tissues. In this stage the brain releases delta waves. These waves have high amplitude and low frequency. Psychiatrists say that there is no difference between the third and fourth stages of sleep. The stage three is also known as delta sleep. This is deepest sleep, where the brain waves are least likely to remain awake.