Fig. 3
From: Pressure based MRI-compatible muscle fascicle length and joint angle estimation
External perturbations to the pMMS at extreme range of motion (ROM). The pMMS outputs do not uniformly correlate with the muscular movements at extreme ROM (circled with *). These perturbations are compensated by a differential-pMMS. a Typical single-pMMS outputs from the TA during dorsiflexion and plantar flexion, b schematic diagram of the differential-pMMS, c representatives of singe-pMMS (top) and differential-pMMS (bottom) outputs to varying joint angles, d representatives of singe-pMMS (top) and differential-pMMS (bottom) outputs to varying muscle fascicle length e representative linear plot of singe-pMMS (top) and differential-pMMS (bottom) estimation of varying joint angles, f representative linear plot of singe-pMMS (top) and differential-pMMS (bottom) estimation of varying muscle fascicle length