Insomnia Support Group
Insomnia is a symptom, rather than a disease, and is characterized by inadequate quantity or quality of sleep. People with insomnia complain of difficulty falling or staying asleep, which results in significant impairment of daytime functioning. Insomnia is categorized as transient (shorter than one week), short-term (one to three weeks) or chronic (longer than three...
Early in my recovery i started having a lot of dreams during a light phase of sleep. I soon learned that it is very possible to dream during every phase of your sleep. I also learned that it was possible my ativan as well as my anxiety was causing me to have hypnagogic dreams (dreams that sometimes leave me feeling like I was oddly awake to begin with, or feel like 'thoughts' sometimes).
Chantillie
And this is further backed up by studies that have shown people who are sleep deprived typically make up the deeper NREM stages first, before the REM.
As chantillie mentions, dreaming, once thought to happen only during REM sleep, is now considered to be a continuous process throughout the night.
However, the most vivid dreaming typically occurs during REM, when blood pressure, heart rate, body temperature, brain activity, and respiration all increase, and though still asleep we are in something more akin to a nearly awakened state.
Interestingly, a recent study showed the pons is very important during REM. The pons is a deep inner part of the brain that blocks signals from the brain to the body during REM, creating a sort of paralysis that prevents us from acting out our dreams. But this study showed that apparently the pons is also involved with memory consolidation and retention, especially with emotional memories.
During each night's 5 or 6 cycles of NREM-REM, the earlier cycles typically have more NREM and less REM, but during the later cycles toward morning the amount of NREM decreases and REM increases.
However, as we age, we often enter a REM stage faster, and the amount of time spent in the deeper NREM stages is typically reduced compared to when we were younger. This is normal consequence of aging and nothing to be concerned about.
Regarding the effect of sleeping pills and other psychoactive drugs, I suspect yes there is some interaction, but this question is best directed to the doctor who prescribed them.
People that have depression typically have their REM sleep more towards the beginning of their sleep. That is one of the biological markers. Antidepressants generally delay and suppress rem.
You could be experiencing rem rebound if you were on drugs that suppress rem and stopped taking them.