SLEEP-WAKE CYCLE
a cycle of sleeping and wakefulness. It can be interrupted by a number of factors such as shift work, stress…
SLEEP DISORIENTATION
Sleep disorientation is the state of being half awake or half asleep with no normal orientation with the mind in…
SLEEP LABORATORY
a research facility to monitor sleep patterns and other activities while we sleep. Such laboratories are found in hospitals that…
SLEEP PARALYSIS
brief inability to speak or move just before we fall asleep or wake up and may be accompanied by hallucinations.…
SLEEP SPINDLES
These are spindle shaped traces on an EEC during sleep stage 2 that are short bursts of 15Hz waves that…
SLEEP TERROR DISORDER
a sleep disorder worse than a nightmare where we wake up disoriented, in panic or with extreme anxiety. They last…
SLEEPWALKING DISORDER
where a person will walk through the house during the early hours of sleep. The person will stare blankly and…
SLEEP DRIVE
a psychological urge to sleep when we need a rest. It is governed by the reticulate activating system and the…
SLEEP EFFICIENCY
a ratio of time in bed versus time asleep and it can be affected by medication, depression and anxiety. It…
SLEEP LATENCY
the time taken to fall asleep. It can be a measure of some sleep disorders. Sleeping pills decrease the latency.…
SLEEP LEARNING
where we are presented with material to learn while we are asleep. a controversial issue where simple Pavlovian conditioning can…
SLEEP PATTERN
our habitual pattern in sleep, 8 hours straight, 2 4 hour periods or a daytime nap. Whatever pattern we show.…
SLEEP STAGES
4 cycle progression of electrical activity that is recorded by an EEC. Stage 1 is marked by drowsiness; stage 2…
SLEEP TALKING
s person talking while they are asleep that often happens in REM sleep and is not from a pathological cause.…
SLEEPER EFFECT
the impact of a persuasive message that increases over time. It involves close scrutiny of the message and a cue…
SLEEPING SICKNESS
an infection in tropical Africa that is caused by a parasite that is transmitted by tsetse flies. The initial symptoms…
SLIP OF THE TONGUE
a minor speech error that is not related to a specific speech disorder. A spoonerism is an example or swapping…
SLIPPED DISK
condition where the gelatinous interior of a vertebral disc pushes out through its coating and presses on adjacent nerves. This…