In dream analysis, a symbol represents a deeper meaning or significance beyond its literal interpretation.

Freud believed that dreams are a way for the unconscious mind to express repressed desires and wishes.

Nightmares are characterized by intense fear and anxiety, often involving threats to one's safety or well-being.

The manifest content is the actual storyline or narrative of the dream, as remembered by the dreamer.

Dream interpretation involves analyzing the manifest content of dreams to uncover their latent content and symbolic meanings.

REM sleep, also known as rapid eye movement sleep, is the stage of sleep during which most dreaming occurs.

Lucid dreaming is the ability to control and manipulate the content of one's dreams while still asleep.

Jung believed that archetypes are universal symbols that represent shared human experiences and emotions.

Somnambulism is a sleep disorder characterized by walking and performing complex behaviors while asleep.

Sleep paralysis is a temporary inability to move or speak that occurs during the transition between sleep and wakefulness.

Melatonin is a hormone produced by the pineal gland that helps regulate the body's sleep-wake cycle.

Hypnagogic hallucinations are vivid, dream-like experiences that occur during the transition between wakefulness and sleep.

Hypnic jerks are sudden, involuntary muscle contractions that occur during the transition between wakefulness and sleep.

Narcolepsy is a sleep disorder characterized by excessive daytime sleepiness, often accompanied by cataplexy, a sudden loss of muscle tone.

False awakenings are dreams in which the dreamer believes they have woken up, but they are still asleep.