Doctor of Medicine, Yonsei University College Medicine, Seoul, 1984. Doctor of Philosophy, Yonsei University College Medicine, Seoul, 1995.
Resident, department Neurology Yonsei University, 1985—1988, fellow, 1991—1994. Research fellow Epilepsy Center, Yale University, New Haven, 1997—1998. Associate professor Asan Medical Center, University Ulsan, Seoul, 2000—2005, chief, since 2000, professor, since 2005.
Member of Korean Epilepsy Society (Research award 1998, 2004, 2005, grant), Korean Neurological Association, American Sleep Society, American Epilepsy Society.
Married Younghee Sohn. Children: Jenny Jongnok, Wonhee.