Dreams are often vivid and emotionally intense. During REM (rapid eye movement) sleep, when most dreaming occurs, brain activity resembles waking consciousness. This leads to lifelike experiences.
Most dreams are forgotten within minutes of waking up. This is primarily due to the brain's shift in activity from the limbic system to the frontal cortex, which handles logical reasoning.
In lucid dreams, individuals become aware that they are dreaming while still asleep. This state allows some degree of control over the dream narrative.
Certain themes appear universally. Elements such as flying, falling, being chased or encountering deceased loved ones are common across different societies.
Some theories propose that dreams serve to process emotions, consolidate memories or simulate threatening scenarios to enhance waking survival skills.