Figure 4:

(A) Schematic of a cable/pulley setup combined with a back-board and a sliding foot plate on low friction rollers to position the subject [34,44-50]. This schematic was previously presented by Cotofana et al. [44]. Reprinting permission is granted based on the open access license. (B) Schematic of the ratcheting mechanism driving an orthotic boot to apply mechanical load to the subject’s feet, where an MRI-compatible load cell is attached for estimation of the applied load [26,27,83]. This schematic was previously presented by Wang et al. [26] and reprinting permission is granted through the Rightslink system. (C) Schematic of the active loading system utilizing an electro-pneumatic device [31]. The schematic was previously presented by Chan et al. [31] Reprinting is based on Creative Commons use guidelines (https://creativecommons.org/licenses/by/4.0/).