Medicine and Health Sciences Commons^™

Laterality Of The Activation Of The Vastus Lateralis Muscle In Females With Parkinson's Disease During The Medication State Compared With Healthy Controls, Yuichi Nishikawa, Kohei Watanabe, Tetsuya Takahashi, Noriaki Maeda, Hirofumi Maruyama, Shinobu Tanaka, Allison S. Hyngstrom

Physical Therapy Faculty Research and Publications

This study quantified the laterality of motor unit activation properties in females with Parkinson’s disease during force production (low to high-intensity contraction) using high-density surface electromyography. Sixteen females with Parkinson’s disease (age = ± 7.6 years, disease duration = 4.9 ± 5.1 years) and 14 healthy female subjects (age = 68.6 ± 3.6 years) performed submaximal ramp-up contractions during isometric knee extension. High-density surface electromyography signals were recorded from both vastus lateralis muscles. The level of heterogeneity was calculated in the spatial distribution patterns of the high-density surface electromyography signals to determine the modified entropy, coefficient of variation of the …