Rifqi Hamdani Pasaribu, Muhammad Ichwan, Aldy Safruddin Rambe, Ririe F. Malisie and Sry Suryani Widjaja (2023) “The Role Of Serotonin In The Cognitive Function Of The Elderly : A Literature Review”, International Journal of Ecophysiology, 5(1), pp. 54-62. doi: 10.32734/ijoep.v5i1.12313.