# Metadata Source URL:: https://en.wikipedia.org/wiki/Rapid_eye_movement_sleep#Deprivation_effects Topics:: #health --- # Rapid eye movement sleep - Wikipedia ## Highlights > [!info]+ Updated on 221122_104219 > > After the deprivation is complete, mild psychological disturbances, such as anxiety, irritability, hallucinations, and difficulty concentrating may develop and appetite may increase. There are also positive consequences of REM deprivation. Some symptoms of depression are found to be suppressed by REM deprivation; aggression may increase, and eating behavior may get disrupted > [!danger]+ Updated on 221122_104240 > > Sleep in general aids memory. REM sleep may favor the preservation of certain types of memories: specifically, procedural memory, spatial memory, and emotional memory. In rats, REM sleep increases following intensive learning, especially several hours after, and sometimes for multiple nights. Experimental REM sleep deprivation has sometimes inhibited memory consolidation, especially regarding complex processes (e.g., how to escape from an elaborate maze).[103] In humans, the best evidence for REM's improvement of memory pertains to learning of procedures—new ways of moving the body (such as trampoline jumping), and new techniques of problem solving. REM deprivation seemed to impair declarative (i.e., factual) memory only in more complex cases, such as memories of longer stories.[104] REM sleep apparently counteracts attempts to suppress certain thoughts > [!danger]+ Updated on 221122_104338 > > After waking from REM sleep, the mind seems "hyperassociative"—more receptive to semantic priming effects. People awakened from REM have performed better on tasks like anagrams and creative problem solving.[73] >Sleep aids the process by which creativity forms associative elements into new combinations that are useful or meet some requirement.[74] This occurs in REM sleep rather than in NREM sleep