Scaling of plantarflexor muscle activity and postural time-to-contact in response to upper-body perturbations in young and older adults.
Hasson CJ, Caldwell GE, Van Emmerik RE. Scaling of plantarflexor muscle activity and postural time-to-contact in response to upper-body perturbations in young and older adults. Exp Brain Res. 2009 Jul; 196(3):413-27.