Janaka graduated from Monash University Faculty of Medicine, Melbourne with honours degrees in Medicine and Surgery. He undertook his Neurology training at Monash Medical Centre and Royal Melbourne Hospital, Melbourne. He was awarded the Mayo Clinic Neurology Fellowship in 2004 by the Australian and New Zealand Association of Neurologists (ANZAN) for further training at the Mayo Clinic, USA. Janaka completed his 2 year Advanced Neurology and Clinical Neurophysiolog(EMG) fellowships at the Rochester and Scottsdale campuses of the Mayo Clinic, USA. 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.

Janaka has expertise in complex Nerve conduction studies, Electrophysiological studies (EMG) and Single Fibre EMG studies that he performs at Monash Neurology as well as in his private rooms. The laryngeal EMG studies are only performed at the Laryngeal EMG clinic at Monash Neurology.

Dr. Seneviratne’s Special interests include Neuromuscular diseases including CIDP(Chronic Inflammatory Demyelinating polyneuropathy) and Guillain-Barré syndrome , Peripheral neuropathies, Myasthenia Gravis and Motor Neurone disease. Dr. Seneviratne also reviews General Neurology patients with  Parkinson’s disease, stroke, tremors, dizziness, Plexus nerve injuries, head injury and entrapment neuropathies(carpal tunnel syndrome, ulnar neuropathy etc.). His current research involves  use of Laryngeal EMG in voice disorders.

He also conducts the Laryngeal EMG clinic with the ENT specialists at Monash, which provides a highly specialised diagnostic service for patients with voice/vocal cord disorders.