Study of Electrical Impedance Myography (EIM) in ALS

"In EIM, high-frequency alternating electrical current is applied to localized areas of muscle via surface electrodes and the consequent surface voltage patterns analyzed.~EIM is very sensitive to the compositional and structural elements of muscle. Data from both human subjects and animal disease models, including ALS, spinal muscular atrophy (SMA), and Duchenne muscular dystrophy (DMD), show that EIM may be sensitive to a variety of pathological states. It is anticipated that EIM will thus likely be able to assist in quantifying the severity of the disease affecting various muscle groups as well as in measuring changes in the disease over time."