Nightmare
Nightmare: Bad dreams that evoke intense fear, anxiety, or terror, usually waking the person. They occur during REM sleep and are typically remembered in detail. Can be linked to stress, trauma, and medications.
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Night Terror / Sleep Terror
A sleep disorder occurring during deep sleep, accompanied by intense fear, screaming, and sometimes sleepwalking. Usually not remembered. Folk traditions describe it as an entity pressing on the chest.
REM Sleep
Rapid Eye Movement — the sleep stage characterized by rapid eye movements. The majority of dreams occur during this phase. The brain is highly active while the body experiences temporary paralysis.
Recurring Dream
The repeated appearance of the same or very similar themes in dreams. Usually points to unresolved emotional issues or unconscious messages. The dream tends to stop when the issue is resolved.
Reality Check
A lucid dreaming technique: regularly asking 'Am I dreaming?' throughout the day to carry this habit into dreams. Tests like counting fingers or reading text are used.
Sleep Cycle
A cycle of approximately 90 minutes consisting of NREM and REM stages, repeating 4-6 times per night. REM duration increases with each cycle, and dreams become more vivid.
Dream Recall
The ability to consciously remember dream content after waking. Varies person to person; can be improved through dream journaling, intention setting, and sleep hygiene.