rest and sleep, sexuality Flashcards
physiology of sleep
- circadian rhythm
- cyclical rhythms
- biological clock
- stages of sleep
- biological clock; regular bodily rhythms that occur on a full 24-hr cycle
- fluctuations in a person’s heart rate, blood pressure, body temperature, hormone secretions, metabolism, and performance and mood depends on part
circadian rhythm
- fundamental to the functioning of life and to the organization and coordination of behavior.
- Simple behavioral functions, such as timing active and inactive periods during the day/night cycle to maximize productivity and minimize risk rely on internal clock functions.
biological clock
two phases: NREM and REM
four stages:
NREM stages 1 - 2: lighter sleep
NREM stages 3 - 4: slow-wave sleep
stages of sleep
characterizes four stages of sleep
NREM (non-rapid eye movement)
- person is in a transitional stage between wakefulness and sleep.
- The person is in a relaxed state but still somewhat aware of the surroundings.
- Involuntary muscle jerking may occur and waken the person.
- The stage normally lasts only minutes.
- The person can be aroused easily.
- This stage constitutes only about 5% of total sleep.
NREM stage 1
- person falls into a stage of sleep.
- The person can be aroused with relative ease.
- This stage constitutes 50% to 55% of sleep.
NREM stage 2
- depth of sleep increases, and arousal becomes increasingly difficult.
- This stage composes about 10% of sleep.
NREM stage 3
- person reaches the greatest depth of sleep, which is called delta sleep.
- Arousal from sleep is difficult.
- Physiologic changes in the body include the following:
Slow brain waves are recorded on an EEG.
Pulse and respiratory rates decrease.
Blood pressure decreases.
Muscles are relaxed.
Metabolism slows and the body temperature is low.
This constitutes about 10% of sleep.
NREM stage 4
- stage that constitutes 20% to 25% of a person’s nightly sleep
- person is difficult to arouse during this stage
- Occurs at the end of each 90-minute cycle
- Increased brain activity and muscle atonia
REM (rapid eye movement) or REM sleep
Purpose of sleep
Restoration, memory consolidation, and preparation
a decrease in the amount, consistency, and quality of sleep; results from decreased REM or NREM sleep
Negatively alters body functions
sleep deprivation
- Occur in nonrapid eye movement (NREM) and rapid eye movement (REM) sleep
- Important for learning, memory, and adaptation to stress
dreams
common sleep disorders
- insomnia
- narcolepsy
- sleep apnea (central vs. destructive)
- sleep deprivation
- potentially serious sleep disorder in which breathing repeatedly stops and starts.
- If you snore loudly and feel tired even after a full night’s sleep, you might have sleep apnea.
Obstructive
Central
Mixed
CPAP/BiPap
sleep apnea
- more common form that occurs when throat muscles relax
- caused by a partial or complete blockage of the airways during sleep. During sleep, a person’s throat muscles relax allowing the tongue and/or fatty tissues of the throat to fall back into the airways and block airflow.
Obstructive sleep apnea
occurs when your brain doesn’t send proper signals to the muscles that control breathing
more of a communication problem
central sleep apnea
- combination of both obstructive and central sleep apnea symptoms.
- Some patients being treated for obstructive sleep apnea with the use of CPAP machines develop symptoms of central sleep apnea upon PAP therapy
mixed sleep apnea
- definitive treatment of moderate or severe OSA
- noninvasive and consists of a mask connected to an air pump that is worn during sleep. This device delivers positive air pressure that holds the airway open
CPAP/BiPap
16 hrs a day
neonates
8-10 hrs a night for a total of 15 hrs/day
infants
total 12 hrs a day plus a nap
toddlers