Download presentation
Presentation is loading. Please wait.
Published byScot Craig Modified over 9 years ago
1
Sleep and Dreams Chapter 5, Section 2
2
We spend about 1/3 of our lives sleeping. Circadian Rhythms – biological clocks that govern our bodily changes like temperature, blood pressure and sleepiness.
3
Humans operate on a 24 hour sleep-wake cycle. However, if timing cues are not present (like clocks or sun positioning) the cycle expands to 25 hours according to studies.
4
Stages of Sleep Measured by brain wave patterns on an EEG Beta waves Alpha waves Theta waves Delta waves
5
Stage 1 lightest sleep brain waves slow from alpha to theta Images that resemble vivid photos
6
If not awakened, you will remain in this stage for 30- 40 minutes Stages 2,3 and 4 Deeper stages of sleep
7
After being in stage 4 for about 30 minutes, you move back to stage 3, 2 and 1
8
Rapid Eye Movement (REM) Another stage Irregular breathing Rise in blood pressure Faster heart beat Faster brain waves
9
As the night goes on, REM sessions get longer On average, people will go through these stages 5 times or 5 cycles.
10
Why Sleep? Gives your body a chance to recover to be able to resist infection Helpful in relieving stress
11
If you are well rested: You will be able to focus better You will be able to learn and remember more. You will be able to think more clearly
12
People or Animals deprived of only REM sleep: Learned slowly Forgot quicker Will catch up on REM the next time they slept
13
REM sleep is important for the brain development of infants and brain exercise of adults.
14
Dreams Most dreaming occurs during REM sleep. These dreams are more vivid and seem more real than those in Non-REM sleep.
15
Often times people are unable to hold onto information from one state of consciousness to another. This is why we can’t remember our dreams.
16
Freud believed that your dreams are what you really want subconsciously. However some of them are painful or unacceptable this is why they appear in dreams.
17
Biological View Neurons in your brain are firing in parts of your brain that control movement and vision. During a dream, your brain is trying to make sense of them.
18
Most psychologists agree that there is no definite way to interpret dreams.
19
Sleep Problems Insomnia – inability to sleep Sometimes caused by stress Can be controlled by medication however…….
20
Psychologists recommend the following: Tense your muscles one at a time then release Avoid worrying
21
Establish a routine Use pleasant images to relax
22
Nightmares Brought on by an upsetting event Anxiousness or depression Occur during REM sleep
23
Night Terrors More severe than nightmares People have racing hearts, gasping for air, thrash Occur during stages 3 or 4
24
Sleepwalking More likely to occur in children. May reflect immaturity of the nervous system
25
Sleep Apnea – interrupted breathing that occurs during sleep Blocked air passages 10 million people have it. Use a nasal mask w/ air flow
26
Narcolepsy – suddenly fall asleep no matter what time it is or where you are. Controlled by medication Thought to be a genetic disorder
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.