Painful tonic spasms in a patient with neuromyelitis optica spectrum disorder: A case report oleh Roshan Aryal, Sushan Homagian, Suraj Shrestha, Bikram Prasad Gajurel, Ragesh Karn, Reema Rajbhandari, Niraj Gautam, Ashish Shrestha, Sumit Shahi, Rajeev Ojha