Animals with few natural predators ten to sleep longer (15 hours) as there is no danger. To grazing animals with many predators who only sleep 4 hours This theory doesn't explain why sleep involves a loss of awareness as this places the organism at a greater risk Characteristics Sleep There are two types of sleep: Non-rapid-eye movements sleep (NREM sleep) Rapid-eye movement sleep (REM sleep) NREM One cycle of NREM sleep last for around 70-90 mins and it consists of 4 distinct stages. ... We go through this cycle around 4 to 5 times during an 8 hours period of sleep during the night. ....

• Word Count: 2627
• Approx Pages: 11
• Grade Level: High School

The role of sleep in memory some evidence that neuronal connections may be remodelled during sleep, and this may explain why young birds and mammals need so much more sleep than adults some memory tasks appear to be more vulnerable to sleep deprivation than others sleep deprivation may produce effects in the brain that resemble those associated with aging the evidence now seems reasonably convincing that sleep plays an important role in memory consolidation - at least for procedural/skill memory it also seems most likely that it is the deep, slow-wave (non-REM) sleep that is importa...

• Word Count: 2912
• Approx Pages: 12
• Grade Level: High School

Further support comes from a study by Shapiro et al (1985), who found that individuals who had completed an ultra-marathon and therefore used up an exceptional amount of resources slept on average an extra 1.5 hours than they normally would for several nights following the race. ... Findings from this study also demonstrated how, in the hours leading up to the onset of sleep in hea...

• Word Count: 3321
• Approx Pages: 13
• Has Bibliography
• Grade Level: Graduate

They were awakened four hours after lights were out, dosed with sublingual Zolpidem (3.5 mg or 1.75 mg) or placebo, kept awake for thirty minutes, and then returned to bed for an additional four hours. ... It should be noted, however, that at least one study suggested that the subjective sedating effects of Zolpidem persisted as long as five hours after dosing, a factor that may be important depending on time of administration and time of arising. ...

• Word Count: 2870
• Approx Pages: 11
• Has Bibliography
• Grade Level: Undergraduate

Dreams are a window into the mind. These may be our most elaborate, distinctive, revealing, and flamboyant creations. Dreams have fascinated minds since ancient times. The Egyptians built temples for dreaming. The oracles of Greece pondered dreams as the "royal road to the unconscious."(Papanek 15) ...

• Word Count: 2618
• Approx Pages: 10
• Has Bibliography
• Grade Level: High School

Usually, sleepwalking occurs during the first three hours that the child has been asleep. ... Night terrors also occur during stages three and four of NREM sleep while still in the first few hours of sleep. ...

• Word Count: 2563
• Approx Pages: 10
• Grade Level: High School

When we sleep, we do much more than just "rest our weary bones"; we tap into our subconscious mind (Ullman and Zimmerman 1979). The subconscious has much to offer about oneself. The average human being spends one third of their life in sleep and during each sleep approximately two hours is spent dre...

• Word Count: 3048
• Approx Pages: 12
• Grade Level: High School

It's hard to think about that day. Who knew it would be the last day I would spend with her. It still feels like a fresh nightmare that just happened last night. But it didn't. It happened over two years ago and I was still struggling with this new reality. I didn't like it. I hated it. How could th...

• Word Count: 2579
• Approx Pages: 10
• Grade Level: High School

Essential question: In treating sleep disorders, which method is more effective: Alternative Holistic or Traditional Western medicine treatment? If you have sleep disorders you want to treat them the fastest way possible. There are many different types of sleeping disorders and they all affect you differently but they have one thing in common, they make sleeping and staying asleep difficult. Sleep is very important and is an essential part of everyday life. There can be many consequences for those who go too long without sleep or bad sleep. ...

• Word Count: 3149
• Approx Pages: 13
• Has Bibliography
• Grade Level: High School