Although female athletes are at greater risk of non-contact knee injuries than men, the factors that contribute to these injuries are not well understood. One important question is whether intense exercise influences the risk of knee injury, both acutely
and over the following days. The purpose of this study was...
Hoffman-reflex (H-reflex) recruitment curves. Smoothed and interpolated recruitment curves from 38
participants were used for analysis. Standard methods were used to calculate three discrete variables
(i.e., H[subscript max]/M[subscript max] ratio, H[subscript th], H[subscript slp]). FPCA was then used to extract principal component functions (PCFs)
from the processed recruitment curves. PCF...
Although research supports the use of whole-body vibration (WBV) to improve neuromuscular performance, the mechanisms for these improvements remain unclear. The purpose of this study was to identify the effect of WBV on the spectral properties of electrically evoked H-reflex recordings in the soleus (SOL) muscle. The H-reflex recordings were...
The purpose of this study was to determine the effects of homosynaptic depression (HD) on spectral properties of the soleus (SOL) H-reflex. Paired stimulations, separated by 100 ms, were used to elicit an unconditioned and conditioned H-reflex in the SOL muscle of 20 participants during quiet standing. Wavelet and principal component...
Activity‐related knee joint dysfunction is more prevalent in females than males. One explanation
for the discrepancy is differences in movement patterns between the sexes. However the underlying
mechanisms responsible for these differences remain unidentified. This study tested spinal motor
control mechanisms influencing motor neuron pool output and subsequent muscle activation...
- Johnson_Spinal_Control_Sex_Differences_EurJApplPhysiol_2012_04_OSUScholarsArchive.doc
Spinal Motor Control Differences Between the Sexes
Samuel T Johnson1, Kristof Kipp2, Mark A
During explosive movements and potentially injurious situations the ability to rapidly generate torque is critical. Previous research has suggested different phases of rate of torque development (RTD) are differentiately controlled. However, the extent to which supraspinal and spinal mechanisms predict RTD at different time intervals is unknown. RTD of the...