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. 2015 Oct 8;3:e1272. doi: 10.7717/peerj.1272

Figure 4. Corrected hip muscle moment arm predictions for (A) AMB, (B) CFB, (C) CFL, (D) FTE, (E) FTI3, (F) IFB, (G) IFMa, (H) IFMp and (I) PIFI1 for a range of hip flexion-extension angles in Lesothosaurus.

Figure 4

A positive hip joint angle (x-axis) indicates hip extension (femoral retraction), while a negative hip joint angle indicates hip flexion (femoral protraction), as shown by the small images of the pelvis of Lesothosaurus in the left lateral view along the x-axis of each graph. A negative moment arm (y-axis) for flexion-extension is a moment arm for flexion; a negative moment arm for abduction–adduction is a moment arm for abduction; a negative moment arm for long axis rotation is a moment arm for medial rotation. FlexExt, flexion-extension; ABDADD, abduction–adduction; LAR, long axis rotation.