Table 2.

Muscle function, spinal reflex excitability, corticospinal excitability and intracortical excitability for participants undergoing TKA and healthy older adults (mean ± SEM).

	Patients with Knee OA	Healthy Controls	p
Quadriceps torque (Nm)	89.9 ± 13.1	163.7 ± 18.6	0.004
Voluntary activation	0.83 ± 0.04	0.92 ± 0.02	0.059
UPA (mV)	0.31 ± 0.06	0.28 ± 0.04	0.600
Corticospinal excitability
RMT (%)	62.9 ± 2.1	62.6 ± 3.1	0.931
Intracortical measures
SICI	0.61 ± 0.10	0.62 ± 0.10	0.946
ICF	2.44 ± 0.46	3.29 ± 0.55	0.255

UPA; Unconditioned Pulse Amplitude

RMT; Resting Motor Threshold (% machine output)

SICI; Short Intracortical Inhibition

ICF; Intracortical Facilitation