What is circadian rhythm?
Internal clock, cycle of the bodily rhythm that occurs over a 24hour period
What 2 category’s are so effected by sleep
Shift workers (night shift) and people who experience jet lag
What is the necessity of sleep?
Serious consequences with minimal sleep loss
Microsleeps- brief side steps into sleep that last for a few seconds…dose off into sleep
What are brain wave patterns used for
To help determine which stage of sleep an individual is experiencing
What does EEG stand for?
Electro-encephalo -graph
Electro=electric
Encephalo=head/brain
What does an electroencephalograph do?
Shows brain wave activity as a person passes through the various stages of sleep
What are the 4 brainwave patterns called
Beta waves
Alpha waves
Theta waves
Delta waves
BATD
What are beta waves
Awake waves
BE BEta awake
Alpha waves are:
Indicate a state of relaxation or light sleep
Alpha=ALright Alright (Mathew mconaway) relaxed
Theta waves are:
Indicate early stages of sleep
Theta:th almost THere (falling asleep)
What are delta waves?
Long slow waves that indicate the deepest stage of sleep
Delta;deepest
How many stages of sleep are there?
4 stages
What is stage 1 sleep?
Light sleep 1-10 minutes
Mix of alpha and theta waves
What happens during stage 1 sleep?
-Hypnagogic images; seeing vivid visual events (images)
-Hypinc jerk: knees,legs,whole body can jerk
-Temperature, heart rate, blood pressure, respiration rate, and muscle tension stat to drop
What is stage 2
Temperature, heart rate, blood pressure, respiration
rate, muscle tension continue to drop
It’s also easy to wake up
What is the 3rd stage of sleep?
Good mix of theta and delta waves up to 30 minutes
Temperature, heart rate, blood pressure, respiration
rate, muscle tension continue to drop and are lowest in stage 4
What is stage 4 sleep?
Mostly delta waves 30-40 minutes
Deep sleep – when 50 percent+ of waves are delta waves
Temperature, heart rate, blood pressure, respiration
rate, muscle tension continue to drop and are lowest in stage 4
What are the 3 main things that happen to your body during stage 4 sleep
- Cellular repair : problems with healing, infections,disease
- Immune system functioning :high risk with. Attracting cancer, disease
- Growth :tiny children made more sleep
What is REM
Rapid eye movement
What happened during REM
Eyes move rapidly under the eyelids.
Person is typically dreaming
Temperature rises
Blood preasure, heart rate, respiration rate are irregular
Muscle tension is low
What happens without REM sleep
-Trouble concentrating
-anxiety
-memory problems
-sadder/more depressed grumpy irritable/agressive
-could be more giggly
REM stimulates the developing brain
(newborns spend 50% sleep in REM, adults spend
only about 20% in REM)
What is REM sleep known as?
Paradoxical sleep
high level
of brain activity but body doesn’t move
What happens if you are awakened y an alarm during REM sleep
People can remember their dream at that moment
