TY - GEN
T1 - Directional variation of active and passive ankle static impedance
AU - Ho, Patrick
AU - Lee, Hyunglae
AU - Krebs, Hermano Igo
AU - Hogan, Neville
PY - 2010/1/1
Y1 - 2010/1/1
N2 - Though ankle mechanical impedance plays an important role in posture and locomotion, it has been inadequately characterized. Unlike previous studies, which confined themselves to measurements along the primary axes of the ankle in an isolated fashion, the study reported here characterized the static component of ankle impedance in two degrees of freedom. In addition, the effect of active muscle contraction on ankle static impedance was measured. We found that ankle static impedance varied significantly with direction under passive conditions. We further observed that, while muscle contraction increased the magnitude of ankle static impedance, its directional variation was essentially unchanged.
AB - Though ankle mechanical impedance plays an important role in posture and locomotion, it has been inadequately characterized. Unlike previous studies, which confined themselves to measurements along the primary axes of the ankle in an isolated fashion, the study reported here characterized the static component of ankle impedance in two degrees of freedom. In addition, the effect of active muscle contraction on ankle static impedance was measured. We found that ankle static impedance varied significantly with direction under passive conditions. We further observed that, while muscle contraction increased the magnitude of ankle static impedance, its directional variation was essentially unchanged.
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U2 - 10.1115/DSCC2009-2573
DO - 10.1115/DSCC2009-2573
M3 - Conference contribution
AN - SCOPUS:77953788036
SN - 9780791848920
T3 - Proceedings of the ASME Dynamic Systems and Control Conference 2009, DSCC2009
SP - 53
EP - 55
BT - Proceedings of the ASME Dynamic Systems and Control Conference 2009, DSCC2009
PB - American Society of Mechanical Engineers (ASME)
T2 - 2009 ASME Dynamic Systems and Control Conference, DSCC2009
Y2 - 12 October 2009 through 14 October 2009
ER -