http://world-expressrx.com Health Information Blog Mon, 08 Mar 2010 05:20:51 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 http://world-expressrx.com/what-is-sleep.php http://world-expressrx.com/what-is-sleep.php#comments Mon, 30 Nov 2009 06:59:30 +0000 admin http://world-expressrx.com/?p=121 Scientist have really faced many difficulties in defining sleep.According to them, sleep is a state of body in which the body is unconscious and the person can be brought back to normal from that state.At these point the human brain pays more attention to the internal responses then to the external signals.

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