Janaka graduated from Monash University Faculty of Medicine, Melbourne with honours degrees in Medicine and Surgery in 1994. He underwent further training at the Mayo Clinic, USA where he was awarded a fellowship in Electromyography and Clinical Neurophysiology. While at the Mayo Clinic he participated in research which has been presented at major neurology meetings and published in international Neurology journals. He has authored chapters in internationally published books on the topics of Neuromuscular Diseases and Headache disorders. He has expertise in complex nerve conduction studies/EMG studies and has a special interest Neuromuscular diseases.