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Fig. 1. (A) Anatomy of the triceps surae muscle group and the Achilles tendon
(adapted from Gray's Anatomy). (B) Photograph of the attachment of
the ultrasound probe to the leg. Three markers are rigidly attached to the
probe by way of a fibreglass mould. This setup allowed for images of the
gastrocnemius muscletendon junction to be visualised in the sagittal
plane of the leg (see Fig.
2).