Year: 2014
Type: dissertation
Abstract: The purpose of this study was to determine if placement of electrodes at various distances along the Tibialis Anterior muscle belly had a significant effect on the intensity of stimulation needed to evoke a contraction using neuromuscular electrical stimulation (NMES). Twenty subjects between the ages of 21-65 in good health and presented with no precautions to NMES were recruited from the CUNY Hunter College physical therapy department. Two reference lines were drawn on subjects’ legs, one outlining the tibial crest (L1), and another from the most lateral portion of the tibial plateau to the center of the lateral malleolus (L2). A large dispersive pad was placed on the back of their thigh, and a weak motor intensity of electrical current was applied with a stimulating electrode throughout the TA. The area in which a minimal visible muscular contraction (MVC) was obtained with the lowest current amplitude was identified as the motor point. The L2 marking was measured and the stimulating electrode was used to find a MVC at 15%, 30%, 45% and 60% of that line. These points were used to compare the intensity change as the points moved away from the motor point. Simple linear regression was used to analyze the data obtained. Results indicated no statistically significant difference in electro stimulation intensity at various measured lengths of the tibia, indicating that identification of a TA motor point may not be necessary to evoke a contraction of the TA with electro stimulation in a clinical setting. Simply placing the electrodes on the muscle belly is sufficient.
Authors: Brent Brookbush, Maya Hakami, Jennifer L. Wolff, Amy Zelin
Institution: City University of New York
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2284197134