In Vivo Assessment of the Tensor Vastus Intermedius Cross-sectional Area Using Ultrasonography

SUMMARY Background. There is growing evidence that the quadriceps muscle group includes a fifth head, the tensor of vastus intermedius (TVI). The purpose of this study was to quantify the anatomic cross-sectional area (CSA) of the TVI using ultrasound. Methods. Ultrasonography scans were taken from 21 young males and females at rest, at 0° (= full extension), 45° … Continued