Tremors Glass half-empty: tremors are involuntary shaking, usually of your hands or arms. Glass half-full: you give the best jazz hands/spirit fingers. If the glass is just a glass: tremors are common with MS and nothing to be ashamed of. Other Terms Secondary- Progressive MS The second phase of Multiple Sclerosis. Sexual Dysfunction Being open about the impact of MS between the sheets. Sleep Apnea Feel like you can’t catch Zz’s? Learn about sleep apnea. Spasticity Involuntary muscle spasms, usually in the legs. View More