Hallucination

1) Subjectively experienced sensations in the absence of an appropriate stimulus, but which are regarded by the individual as real. They may be of organic origin or associated ...

hallucination

Health care; Cancer treatment

A sight, sound, smell, taste, or touch that a person believes to be real but is not real. Hallucinations can be caused by nervous system disease, certain drugs, or mental ...

hallucination

Health care; Sleep disorder

A false and distorted perception of objects or events. Technically, it's defined as a perception in the absence of a stimulus.

nap

Health care; Sleep disorder

Short period of sleep at a time separate from the major sleep period, especially during the day.

rebound insomnia

Health care; Sleep disorder

Sleep difficulties after discontinuing use of a hypnotic medication.

restless legs syndrome (RLS)

Health care; Sleep disorder

Sleep disorder characterized by a deep creeping, or crawling sensation in the legs even when the legs are not moving. There is neurologic movement disorder that causes an almost ...

sleep fragmentation

Health care; Sleep disorder

Sleep interruption due to frequent or sustained awakenings or early morning awakenings.

insomnia

Health care; Sleep disorder

Sleeplessness; chronic difficulty with sleep onset or maintenance of sleep, or a perception of nonrefreshing sleep. People with insomnia have one or more of the following: * ...

sleepwalking

Health care; Sleep disorder

Somnambulism. A sleep disorder where the person gets out of bed and walks around during sleep. Typically occurs in the first third of the night during deep NREM sleep (stages 3 ...