TY - JOUR
T1 - Experimental and biomechanical model force fields produced by intraspinal microstimulation of the cat lumbar spinal cord
AU - Bhowmik, Manoshi
AU - Boyce, Vanessa
AU - McConnell, George
AU - Joyce, David M.
AU - Grill, Warren M.
AU - Lemay, Michel A.
PY - 2003
Y1 - 2003
N2 - Using a biomechanical model of the cat hindlimb, we studied patterns of endpoint forces created by all muscle combinations of fourteen selected muscles, and compared them to the force patterns produced by intraspinal microstimulation of the lumbar spinal gray matter. We ran the model with two different activation schemes for the muscles. The first run used combinations of the fourteen selected muscles stimulated at the same level of activation. The second run used combinations where muscle forces were normalized to produce the same maximum end-point force. These results were compared to force field patterns obtained experimentally during intraspinal microstimulation. Although there were slight variations in the force patterns produced, both methods converged to four dominant patterns. When muscles in the model were normalized, some force patterns were found that were not observed experimentally. These results show the significance of specific levels of muscle activation to the production of the experimental patterns.
AB - Using a biomechanical model of the cat hindlimb, we studied patterns of endpoint forces created by all muscle combinations of fourteen selected muscles, and compared them to the force patterns produced by intraspinal microstimulation of the lumbar spinal gray matter. We ran the model with two different activation schemes for the muscles. The first run used combinations of the fourteen selected muscles stimulated at the same level of activation. The second run used combinations where muscle forces were normalized to produce the same maximum end-point force. These results were compared to force field patterns obtained experimentally during intraspinal microstimulation. Although there were slight variations in the force patterns produced, both methods converged to four dominant patterns. When muscles in the model were normalized, some force patterns were found that were not observed experimentally. These results show the significance of specific levels of muscle activation to the production of the experimental patterns.
KW - Force field representation
KW - Microstimulation
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M3 - Conference article
AN - SCOPUS:84943397634
SN - 1071-121X
SP - 37
EP - 38
JO - Proceedings of the IEEE Annual Northeast Bioengineering Conference, NEBEC
JF - Proceedings of the IEEE Annual Northeast Bioengineering Conference, NEBEC
T2 - Proceedings of the IEEE 29th Annual Northeast Bioengineering Conference
Y2 - 22 March 2003 through 23 March 2003
ER -