TY - GEN
T1 - Muscle force augmentation by low-intensity electrical stimulation
AU - Langzam, E.
AU - Isakov, E.
AU - Nemirovsky, Y.
AU - Mizrahi, J.
PY - 2005
Y1 - 2005
N2 - In cases of muscle partial deficiency, force augmentation can be achieved by hybrid activation, i.e., by combining electrical stimulation (ES) with volitional activation. In the present study the volitional and electrically-induced torque components are resolved under visual-feedback activation. Isometric contraction of the Tibialis Anterior (TA) muscle was studied on 5 healthy subjects, using an activation protocol combining ES alone, volitional activation alone and hybrid activation. Ankle torque and TA EMG were measured. A computational algorithm was developed to dissociate the volitional from the overall torque, based on EMG filtering and on pre-measured calibration curves of volitional torque versus EMG. Based on a defined Facilitation Factor, the results indicate that within the range of stimulation intensities, there exist regions of increased facilitation of the volitional activation of the TA muscle, in which the torque contribution due to the induced activation is higher compared that of the recruitment curve.
AB - In cases of muscle partial deficiency, force augmentation can be achieved by hybrid activation, i.e., by combining electrical stimulation (ES) with volitional activation. In the present study the volitional and electrically-induced torque components are resolved under visual-feedback activation. Isometric contraction of the Tibialis Anterior (TA) muscle was studied on 5 healthy subjects, using an activation protocol combining ES alone, volitional activation alone and hybrid activation. Ankle torque and TA EMG were measured. A computational algorithm was developed to dissociate the volitional from the overall torque, based on EMG filtering and on pre-measured calibration curves of volitional torque versus EMG. Based on a defined Facilitation Factor, the results indicate that within the range of stimulation intensities, there exist regions of increased facilitation of the volitional activation of the TA muscle, in which the torque contribution due to the induced activation is higher compared that of the recruitment curve.
UR - http://www.scopus.com/inward/record.url?scp=33846908360&partnerID=8YFLogxK
U2 - 10.1109/iembs.2005.1615809
DO - 10.1109/iembs.2005.1615809
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AN - SCOPUS:33846908360
SN - 0780387406
SN - 9780780387409
T3 - Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
SP - 5808
EP - 5811
BT - Proceedings of the 2005 27th Annual International Conference of the Engineering in Medicine and Biology Society, IEEE-EMBS 2005
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2005 27th Annual International Conference of the Engineering in Medicine and Biology Society, IEEE-EMBS 2005
Y2 - 1 September 2005 through 4 September 2005
ER -