movement disorder primary orthostatic tremor https://rarediseases.info.nih.gov/diseases/8563/primary-orthostatic-tremor https://www.malacards.org/card/primary_orthostatic_tremor MONDO:0016546 orthostatic tremor, primary MEDGEN:164206 POT GARD:0008563 NORD:1612 SCTID:715902009 UMLS:C0878578 shaky leg syndrome Orphanet:238606 OT Primary orthostatic tremor (POT), or ``shaky legs syndrome'', is a rare movement disorder characterized by fast, task-specific tremor, affecting the legs and trunk while standing. MESH:C536418 pot