Relationships between Muscle Architecture of Rectus Femoris and Functional Parameters of Knee Motion in Adults with Down Syndrome

<div>Examples of ultrasound images of the rectus femoris. Comparative evaluation of the muscle rectus femoris (RF) in the sagittal view. (a) Ultrasound image of the RF from a typically developed subject. (b) Ultrasound image from a subject with Down syndrome. TK-S, subcutaneous layer thickness (L1); TK-M, muscle thickness (L2); PA, pennation angle between the fascia and the muscle fascicle.</div>

BioMed Research International

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Figure 1

Figure 1: Relationships between Muscle Architecture of Rectus Femoris and Functional Parameters of Knee Motion in Adults with Down Syndrome 