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. Author manuscript; available in PMC: 2013 Apr 1.
Published in final edited form as: J Neural Eng. 2012 Mar 14;9(2):026019. doi: 10.1088/1741-2560/9/2/026019

Figure 2.

Figure 2

Experimental set-up (drawing not to scale). The animal was posiitioned on one end of a cantilevered trough from which its hind limbs were suspended. The MTP joint was attached to a 6 degree of freedom load cell with plastic ties. Approximately ¾ of the cat's weight was counterbalanced with a constaant force spring. USEAs were implanted in thhe sciatic, femoral and muscular branch nerves. A meechanical `sitting' stop limited the extent of thhe sitting posture to keep the hind limb extensors from excessive elongation. The animal was keept in an approximate standing posture for mapping of USEA electrodes by a trough stop that was removed for all stance experiments.