Thank you very much for the response and the link you have given helped me a lot to details about myasthenia gravis..but my problem is why does my diagnostics tests results to negative in myasthenia gravis.i undegone mri ct scan emg but all are normal but i am still experiencing some of the symptoms of myasthenia gravis like difficulty focusing in a certain direction, double vision and headaches.my body tells i do have myasthenia yet my diagnostics are not.