en Clinical Neuroscience Clinical Neuroscience News and Reports News and Reports <p dir="ltr" style="text-align: justify;">Sleep-related movement disorders should be differentiated from parasomnias, sleep-associated&nbsp;behavioral disorders, and epilepsy. Polysomnography (PSG) is the gold standard in evaluating&nbsp;such disorders. Periodic leg movement disorder during sleep (PLMS), hypnic jerks, bruxism,&nbsp;rhythmic movement disorder, restless legs syndrome, and nocturnal leg cramps have broadly&nbsp;been discussed in the literature. However, periodic arm movement disorder in sleep (PAMS) is&nbsp;a less-appreciated entity perhaps because arm surface electromyography is not an integral part&nbsp;of the standard polysomnography. Results from our PSG study in a case suspected for PAMS&nbsp;prompted us to herewith discuss this problem.</p> Polysomnography, Periodic arm movements during sleep, Sleep disorders 269 275 http://bcn.iums.ac.ir/browse.php?a_code=A-10-10-5&slc_lang=en&sid=1 Mohammad Torabi-Nami torabinami@sums.ac.ir 1370031947532846007913 1370031947532846007913 Yes Department of Neuroscience, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran. Samrad Mehrabi mehrabis@sums.ac.ir 1370031947532846007914 1370031947532846007914 No Sleep Disorders Laboratory, Namazi Hospital, Shiraz University of Medical Sciences, Shiraz, Iran. Sabri Derman drsabriderman@gmail.com 1370031947532846007915 1370031947532846007915 No Sleep Disorders Unit, American Hospital, Koç Foundation, Istanbul, Turkey