a. Sleep latency: The amount of time it takes for a person to fall asleep
b. Sleep apnea: Periodic cessation of breathing during sleep causing arousals from sleep.
c. Circadian Rhythm Sleep Disorders:
Sleep disorders that are caused due to disturbance in the normal 24 hour sleep wake cycle.
d. Periodic Limb Movement Disorder:
Abnormal and repeated leg movements in sleep which causes considerable sleep disturbance.
e. Restless Legs Syndrome:
A disorder characterized by aching or burning sensations in the lower limbs that occur in sleep and that may awaken the patient from sleep.
A disorder that manifests with repeated episodes of daytime sleepiness, accompanied by any or all of these conditions - sleep paralysis, cataplexy and hallucinations.
The normal cyclical discharge through the vagina of blood and mucosal tissues from the nonpregnant uterus.
Unknown, a specific cause is not known.
i. Nor epinephrine:
A neurotransmitter found in the sympathetic nervous system.
A neurotransmitter found in the extra pyramidal system of the brain, and important in regulating movement
Hypocretin, a key neurotransmitter kindles the arousal centers in the brain to cause wakefulness. It also helps maintain wakefulness without falling asleep unexpectedly.
l. REM Sleep:
It is so called because of the Rapid Eye Movements that occur during this phase of sleep
m. Sleep drunkenness:
Movements or behaviors associated with sleep, sleep stages, or partial arousals (awakenings) from sleep that may impair sleep maintenance.
Experiencing sensations in the absence of an appropriate stimulus, but which the individual regards as real.
Experiencing abnormal sensations in the presence of an appropriate stimulus.
A severe emotional disorder characterized by delusion formation, hallucinations, emotional disharmony, and regressive behavior.
p. Theta Waves:
A waveform recorded on an Electroencephalogram (EEG). It’s frequency range is normally between 5 and 8 cycles a second. It indicates a drowsy or idealing state of the mind. A person who has taken time off from a task and begins to daydream is often in a theta brainwave state.