Figure 2. Examples of subtle, moderate and extreme buckling in the human gastrocnemius at very short lengths.

Thin, oblique arrows indicate buckles. Thicker, vertical arrows indicate distal muscle–tendon junction. The panels at the right show details of features in the left panels. A, subtle buckling in distal muscle fascicles. B, two buckles in the distal aponeurosis. C, gross buckling of the distal end of the muscle, most notably in the central part of the distal aponeurosis.