Punding

Punding is compulsive performance of repetitive, mechanical tasks, such as assembling and disassembling, collecting, or sorting objects. It can also apply to digital objects, such as computer files and data. The term was originally coined to describe complex, prolonged, purposeless (unproductive), and stereotyped behaviour in phenmetrazine and chronic amphetamine users, by Swedish forensic psychiatrist G. Rylander, in 1968. It was later described in Parkinson's disease, but mainly in cases of patients being treated with dopaminergic drugs. It has also been described in methamphetamine and cocaine users, as well as in some patients with gambling addictions, and hypersexuality.

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