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(Message started by: wade32 on Apr 16th, 2012, 7:46am)
Title: Sleep
Post by wade32 on Apr 16th, 2012, 7:46am
In the past, a shroud of mystery has covered the subject of sleep and dreams. Little objective knowledge about the nature of sleep and dreams was available. What information about sleep was accessible, represented a murky mixture of facts and mystified conclusions, mired in superstition. Sleep, this condition of semi-consciousness, causes anxiety because sleep reduces our environmental perceptions and degrades our ability to respond to danger. We are concerned because we realize that we are very vulnerable while we are asleep.

Sleep involves the cessation of most of our sensory input and a reduction in most of our physiological processes: We are not aware of ordinary sounds; we close our eyes in order to eliminate visual input. On the physiological level, our limbic nervous system slows down our breathing rate and our heartbeat; it even reduces our blood pressure. Our autonomic nervous system curtails the production of waste products in order to prevent disruptions to our sleep. While our physiological functions operate at a minimal level, our brain also adjusts itself to reduced sensory input and operates on a very primitive level.

When we try to probe the mysteries of sleep, we are only moderately concerned with the changes in our physiological functions while we are asleep. After all, these functions are readily discernible and are fully under the automatic control of the autonomic nervous system. What really intrigues us, are the mechanics of sleep as it affects our brain and, therefore, our mind. What are the functions of our brain while we are asleep?

Title: Re: Sleep
Post by pex on Apr 16th, 2012, 11:38am

on 04/16/12 at 07:46:25, wade32 wrote:
In the past, a shroud of mystery has covered the subject of sleep and dreams. Little objective knowledge about the nature of sleep and dreams was available. What information about sleep was accessible, represented a murky mixture of facts and mystified conclusions, mired in superstition. Sleep, this condition of semi-consciousness, causes anxiety because sleep reduces our environmental perceptions and degrades our ability to respond to danger. We are concerned because we realize that we are very vulnerable while we are asleep.

Sleep involves the cessation of most of our sensory input and a reduction in most of our physiological processes: We are not aware of ordinary sounds; we close our eyes in order to eliminate visual input. On the physiological level, our limbic nervous system slows down our breathing rate and our heartbeat; it even reduces our blood pressure. Our autonomic nervous system curtails the production of waste products in order to prevent disruptions to our sleep. While our physiological functions operate at a minimal level, our brain also adjusts itself to reduced sensory input and operates on a very primitive level.

When we try to probe the mysteries of sleep, we are only moderately concerned with the changes in our physiological functions while we are asleep. After all, these functions are readily discernible and are fully under the automatic control of the autonomic nervous system. What really intrigues us, are the mechanics of sleep as it affects our brain and, therefore, our mind. What are the functions of our brain while we are asleep?

Perhaps you should buy this book (http://www.rationality.net/sleepdreams.htm) to find the answer ::)
Title: Keith Gilabert,  "Sleep"
Post by keithgilabert on May 16th, 2012, 8:50am
That is very insightful.  

Thanks,

Keith Gilabert
Title: Re: Sleep
Post by shabbir on May 29th, 2012, 7:14am
A sound sleep can refresh mind.
Title: Re: Sleep
Post by alien2 on May 29th, 2012, 11:06am
The night blessing of the Yash-El: "Dream not of today."

Poppies will put them to sleep. (http://www.youtube.com/watch?v=RG2keYgBiZc)

http://www.youtube.com/watch?v=s0R8XZeIpy4
Title: Re: Sleep
Post by iatkrox on Jul 2nd, 2012, 1:06am
Sleep will refresh human body and mind so that's why i sleep 2.am to 11.am every day ;)
Title: Re: Sleep
Post by lopez on Jul 17th, 2012, 3:52am
Sleep is a naturally recurring state characterized by reduced or absent consciousness, relatively suspended sensory activity
Title: Re: Sleep
Post by benmartorano on Oct 5th, 2012, 2:49pm
Many years ago I discovered it is possible to actually choose what you want to dream about.... I know it sounds nuts but at this point I can do it about 40% of the time.

I think John Lennon said he had lost of song ideas come to him in sleep as well
Title: Re: Sleep
Post by jordan on Feb 2nd, 2014, 1:55am
Dalai Lama said that sleep is the best meditation
Title: Re: Sleep
Post by movie4fun on Aug 18th, 2014, 6:23pm
just dont sleep for 24 hours and you will understand why you need it :p
Title: Re: Sleep
Post by anglia on Aug 20th, 2015, 10:14pm
our brain get refreshed while we are sleeping. It also has gone in rest.
Title: Re: Sleep
Post by gitanas on Jun 22nd, 2016, 11:44pm
Dalai Lama once said that sleep is the best meditation. I don't know if it was a joke :)


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