[ABSTRAK
, Background: The practice of anesthesia is potentially hazardous occupation andrequire sustained vigilance, parallel decision making and fine motor skills. Theworking hours of anesthesiology and intensive care residents are often extendedmore than 12 hours. There should be a study on cognitive and psychomotorfunctions of anesthesiology and intensive care residents after 12 working hours.Methods: This is an observational study on anesthesiology and intensive careresidents with 12 working hours, each of them got their cognitive and psychomotorfunctions tested on hour-0 and hour-12. The cognitive functions were tested with“Stimulasi Kognitif” (STIMKOG) and psychomotor functions were tested withgrooved pegboard.Results: In STIMKOG, stimulasi tayangan gambar berurutan we got statisticallysignificant decreased on hour-12 compare to hour-0 (p=0,035). In stimulasi kilatancahaya tunggal, kilatan cahaya ganda, nomor acak, frekuensi tayangan gambar,and asosiasi, we got statistically insignificant with p, consecutively, 0,261; 0,055;0,614; 0,061; 0,386. But in stimulasi orientasi letak we got 100% true of all testnot only in hour-0 but also in hour-12. In psychomotor functions test withGrooved Pegboard we got statistically significant decreased on hour-12 compareto hour-0 (p=0,037).Conclusion: There were decreasing in integrated attention function, visualmemory, naming and executive function, based on STIMKOG stimulasi tayangangambar berurutan, in anesthesiology and intensive care residents FKUI after 12working hours. There were decreasing in psychomotor functions of anesthesiology and intensive care residents FKUI after 12 working hours, tested with grooved pegboard.]