Figure 2: Relative motion of segments to one another in humans and chimpanzees. | Nature Communications

Figure 2: Relative motion of segments to one another in humans and chimpanzees.

From: Surprising trunk rotational capabilities in chimpanzees and implications for bipedal walking proficiency in early hominins

Figure 2

(a) Motion of the thorax relative to the pelvis over a stride (mean±s.d.). (b) Relative pelvis-to-thorax motion partitioned by the contributions of the lumbar and thoracic segments. (c,d) Angular motions near 50% of stride for humans and chimpanzees with segment motion represented by transverse lines (rotations exaggerated to enhance clarity). (e) Total range of relative pelvis-to-thorax, pelvis-to-lumbar and lumbar-to-thorax motion over a stride (mean±s.d.). H and C represent humans and chimpanzees, respectively; NS represents non-significance using a Wilcoxon rank-sum test at the P=0.05 level.

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