Characterization of Central Activation and Contractile Properties of Lumbar Extensor Muscles. Rachel Ruggeri, SPT. Ohio University Motor Control Lab Dr. David Russ Ph.D., P.T. Stephanie Gustwiller, SPT Dr. James Thomas, Ph.D., P.T.
Rachel Ruggeri, SPT
Ohio University Motor Control Lab
Dr. David Russ Ph.D., P.T. Stephanie Gustwiller, SPT Dr. James Thomas, Ph.D., P.T.
1. Central Activation
2. Force Frequency Relationship
Stackhouse et. al, Muscle and Nerve 2000
MVIC + stim force
Kent-Braun et. al, Muscle & Nerve 1996
Lee et al., Encyclopedia of Neuroscience, Binder, Hirokawa, Windhorst (Eds.) 2009.
MCIV + stim
(MVIC + stim Force)
(Kent – Braun, Muscle & Nerve 1996)
(Stevens et. al, Arch Phys Med Rehabil Vol 82, 2001)
Hill Equation Force Frequency Relationship Stimulation
y = y0 + [(axb)/(cb + xb)]
y = peak F
x = frequency
Y0 = minimum peak
a = scaling factor
c = frequency at which 50% of max peak F is produced
b = slope
F Stimulation50 Values
Mean CAR: 0.95 (SD = 0.06)