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Design of Abdominal Wall Hernioplasty Meshes Guided by Mechanobiology and the Wound Healing Response
Published in Jiro Nagatomi, Eno Essien Ebong, Mechanobiology Handbook, 2018
Shawn J. Peniston, Karen J.L. Burg, Shalaby W. Shalaby
The abdominal cavity is approximated by the spine and back muscles posteriorly, the pelvic cavity inferiorly, and the thoracic cavity superiorly. Theoretically, the abdominal cavity possesses the necessary support to resist herniation. However, herniation in the inguinal region occurs through the myopectineal orifice, as described by Fagan and Awad [36]. The myopectineal orifice is quadrangular in shape and is divided superiorly and inferiorly by the inguinal ligament, which runs from the anterior-superior iliac spine to the pubic tubercle (Figure 29.3). The myopectineal orifice is perforated in the medial-lateral triangle by the spermatic cord and in the femoral triangle by the femoral artery and vein.
Does creatine supplementation affect recovery speed of impulse above critical torque?
Published in European Journal of Sport Science, 2023
Leonardo Henrique Perinotto Abdalla, Ryan Michael Broxterman, Thomas Jackson Barstow, Camila Coelho Greco, Benedito Sérgio Denadai
The electrically evoked contractions were induced by a high voltage constant current stimulator (DS7A; Digitimer, Welwyn Garden City, United Kingdom), which delivered a unique square wave stimulus of 1 ms duration at (1 Hz), with a voltage maximum of 400 V, to the femoral nerve. A monopolar cathode (0.5 cm in diameter, Dermatrode; American Imex, Irvine, CA, USA) was placed over the femoral nerve at the level of the femoral triangle below the inguinal ligament. The anode (5 cm x 10 cm; Compex, Ecublens, Switzerland) was placed at the bottom of the gluteal fold opposite the cathode (Neyroud et al., 2012). These sites were marked on the skin and used as a reference for subsequent visits. The intensity for the supramaximal stimuli was determined during familiarization, increasing the intensity of the current until the maximum contraction torque was obtained (that is, when an increase in the intensity of the stimulus did not produce an increase in the amplitude of the contraction). The stimulation intensity was then increased by 30% to guarantee supramaximal stimuli. Every 12 contractions (i.e. 1 min) during the ET + 10% tests and immediately after task failure, electrical stimuli were administered 1.5 s into the MVC and 1.5 s after the MVC, to obtain measures of superimposed and potentiated contraction torques, respectively. However, for this retrospective analysis only the data related to the electrical stimulus applied 1.5 s after the MVC were used, as these are assessments of peripheral fatigue.
Corticospinal and intracortical excitability is modulated in the knee extensors after acute strength training
Published in Journal of Sports Sciences, 2022
Razie J Alibazi, Ashlyn K Frazer, Alan J Pearce, Jamie Tallent, Janne Avela, Dawson J Kidgell
Direct muscle responses were obtained under resting conditions from the right rectus femoris by supra-maximal percutaneous electrical stimulation of the femoral nerve approximately 3–5 cm below the inguinal ligament in the femoral triangle. A digitimer (Hertfordshire. UK) DS7A constant-current electrical stimulator (pulse duration 1 ms) was used to deliver each electrical pulse. The cathode was placed over the femoral nerve in the femoral triangle with the anode positioned between the greater trochanter and iliac crest. An increase in current strength was applied to the femoral nerve until there was no further increase in the amplitude of sEMG response (MMAX). To ensure maximal responses, the current was increased an additional 20% and the average MMAX was obtained from five stimuli, with a period of 6–9 s separating each stimulus (Ansdell, Brownstein et al. 2020)
Do aerobic characteristics explain isometric exercise-induced neuromuscular fatigue and recovery in upper and lower limbs?
Published in Journal of Sports Sciences, 2019
Gianluca Vernillo, John Temesi, Matthieu Martin, Guillaume Y. Millet
During knee extension, single electrical stimuli of 1-ms duration were delivered via constant-current stimulator (DS7A, Digitimer, Welwyn Garden City, Hertfordshire, UK) to the femoral nerve via surface cathode securely taped into the femoral triangle (10-mm stimulating diameter, Meditrace 100) and 50 × 90 mm rectangular anode (Durastick Plus, DJO Global, Vista, CA) in the gluteal fold. During elbow flexion, single electrical stimuli of 200-µs duration were delivered to the BB motor point (for force measurements) and brachial plexus (for M-wave measurements) via constant-current stimulator (DS7AH, Digitimer, Welwyn Garden City, Hertfordshire, UK). For motor point stimulation, the cathode (Meditrace 100) was placed on the motor point (i.e. on the BB muscle belly, midway between the anterior edge of deltoid and the proximal elbow crease with the elbow flexed at 90°), and the anode (Durastick Plus) over the bicipital tendon. For brachial plexus stimulation, the cathode (Meditrace 100) was securely taped in the supraclavicular fossa and the anode (Durastick Plus) was placed over the acromion.