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Fig. 1 | BMC Research Notes

Fig. 1

From: Gait screening of a population of young, healthy athletes by means of a portable, low-cost device unveils hidden left–right asymmetries in both quadriceps and anterior cruciate ligament forces

Fig. 1

Simplified mechanical models used for computations in the sagittal plane. a Decomposition of GRF vector in its longitudinal (Fp//) and orthogonal (FN) components acting at the head of the femur, and the angle that the femur forms with the vertical direction (α) used for the determination of Fquad. b Close-up of the knee joint where, assuming that the patella acts like a pulley, Fquad equals the force exerted by the patellar tendon and thus the force acting on the ACL can be computed from the sum of Fquad vectors as illustrated, after the measurement of the knee flexion angle (β). Drawing of leg and knee provided by Roberta Frigeri

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BMC Research Notes

ISSN: 1756-0500

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