Table 1.

Mean onset latencies (ms) of balance-correcting responses of left-sided muscles for perturbation directions eliciting maximum response amplitudes in the listed muscle

Muscle	Direction	Young	Middle-aged	Elderly
Tibialis anterior	Backwards (180)	114(7)	128(19)*	132(11)*
Soleus	Forward left (315)	135(19)	160(17)*	182(18)*†
Gluteus medius	Backward left (225)	109(12)	129(14)*	129(12)*
Deltoid	Backward right (135)	109(8)	114(12)	134(18)*†

Standard deviations are shown in parentheses. *Elderly or middle-aged means significantly (P < 0.05) different from young. † Elderly means different from middle aged.