Ultrasound of the tibialis anterior after polio

This is an image of the right and left tibialis anterior in a patient with remote polio. The image on the left shows the more severely affected muscle, with greater atrophy; note the distance from the surface to the interosseus membrane (IM), slightly greater hyperechogenicity, loss of bone edge delineation on the tibia (T), and greater loss of heterogeneity. The overall appearance of the muscle tissue, however, is similar to that seen in many myopathic disorders.