Proximal metatarsal articular surface shape and the evolution of a rigid lateral foot in hominins

Proctor, Daniel J.

doi:10.1016/j.jhevol.2013.09.004

Cited by 19 publications

(31 citation statements)

References 45 publications

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“…It appears that few meaningful interpretations about the function of the lateral longitudinal foot arch, and the presumed bipedal affinities of fossil hominines, should be derived from analyses of the components of the calcaneocuboid or the cubometatarsal joints. These conclusions do not support assumptions that are associated with several, presumably functionally based, analyses of hominine fossils and human bipedal evolution (Bojsen-Møller 1979; Lewis, 1980; Susman, 1983; Kidd, 1999; Klenerman & Wood, 2006; Bennet, et al 2009; Lovejoy, et al 2009; Ward, et al 2011; Zipfel, et al 2011; Proctor, 2013). …”

Section: Discussionmentioning

confidence: 65%

Kinematics of primate midfoot flexibility

Greiner

Ball

2014

American J Phys Anthropol

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This study describes a unique assessment of primate intrinsic foot joint kinematics based upon bone pin rigid cluster tracking. It challenges the assumption that human evolution resulted in a reduction of midfoot flexibility, which has been identified in other primates as the “midtarsal break.” Rigid cluster pins were inserted into the foot bones of human, chimpanzee, baboon and macaque cadavers. The positions of these bone pins were monitored during a plantarflexion-dorsiflexion movement cycle. Analysis resolved flexion-extension movement patterns and the associated orientation of rotational axes for the talonavicular, calcaneocuboid and lateral cubometatarsal joints. Results show that midfoot flexibility occurs primarily at the talonavicular and cubometatarsal joints. The rotational magnitudes are roughly similar between humans and chimps. There is also a similarity among evaluated primates in the observed rotations of the lateral cubometatarsal joint, but there was much greater rotation observed for the talonavicular joint, which may serve to differentiate monkeys from the hominines. It appears that the capability for a midtarsal break is present within the human foot. A consideration of the joint axes shows that the medial and lateral joints have opposing orientations, which has been associated with a rigid locking mechanism in the human foot. However, the potential for this same mechanism also appears in the chimpanzee foot. These findings demonstrate a functional similarity within the midfoot of the hominines. Therefore, the kinematic capabilities and restrictions for the skeletal linkages of the human foot may not be as unique as has been previously suggested.

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Section: Discussionmentioning

confidence: 65%

Kinematics of primate midfoot flexibility

Greiner

Ball

2014

American J Phys Anthropol

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“…afarensis (A.L. 333-160) and H. habilis (OH 8) with a dorsoplantarly expanded and flattened fourth metatarsal base (DeSilva, 2010;Ward et al, 2011;Proctor, 2013). This contrasts with the morphology in Au.…”

Section: Discussionmentioning

confidence: 94%

“…africanus are sister taxa Irish et al, 2013), there would have to be a reversal in midfoot morphology from the flattened, human-like fourth metatarsal base in the temporally earlier Au. africanus (DeSilva, 2010;Proctor, 2013), to the convex, more ape-like metatarsal base of the temporally later Au. sediba .…”

Section: Discussionmentioning

confidence: 99%

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Calcaneal robusticity in Plio-Pleistocene hominins: Implications for locomotor diversity and phylogeny

Prang

2015

Journal of Human Evolution

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“…Although the locomotor patterns show similar tendencies among African apes (Doran, , ; Doran & Hunt, ; Remis, ), the gorillas are the most terrestrial animal among extant hominoids, except for humans (Remis, ). The proximal articular surface of the metatarsal V bone of the gorillas has a dorsoplantar convex curvature, and tends to be mediolaterally narrower and a little more concave in curvature than that of the chimpanzees, suggesting that the lateral column of the gorilla foot dorsiflexes during terrestrial locomotion (Proctor, ). The abductor digiti minimi muscle has a relatively well‐developed additional muscle belly ( M. abductor ossis metatarsi V ) in the gorillas (Straus, ; Raven, ); this portion is often found, albeit smaller, in the chimpanzees but is rare in the orangutans (Hepburn, ; Straus, ; Gomberg, ).…”

Section: Discussionmentioning

confidence: 99%

Multivariate analysis of variations in intrinsic foot musculature among hominoids

et al. 2018

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Comparative analysis of the foot muscle architecture among extant great apes is important for understanding the evolution of the human foot and, hence, human habitual bipedal walking. However, to our knowledge, there is no previous report of a quantitative comparison of hominoid intrinsic foot muscle dimensions. In the present study, we quantitatively compared muscle dimensions of the hominoid foot by means of multivariate analysis. The foot muscle mass and physiological cross-sectional area (PCSA) of five chimpanzees, one bonobo, two gorillas, and six orangutans were obtained by our own dissections, and those of humans were taken from published accounts. The muscle mass and PCSA were respectively divided by the total mass and total PCSA of the intrinsic muscles of the entire foot for normalization. Variations in muscle architecture among human and extant great apes were quantified based on principal component analysis. Our results demonstrated that the muscle architecture of the orangutan was the most distinctive, having a larger first dorsal interosseous muscle and smaller abductor hallucis brevis muscle. On the other hand, the gorilla was found to be unique in having a larger abductor digiti minimi muscle. Humans were distinguished from extant great apes by a larger quadratus plantae muscle. The chimpanzee and the bonobo appeared to have very similar muscle architecture, with an intermediate position between the human and the orangutan. These differences (or similarities) in architecture of the intrinsic foot muscles among humans and great apes correspond well to the differences in phylogeny, positional behavior, and locomotion.

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Proximal metatarsal articular surface shape and the evolution of a rigid lateral foot in hominins

Cited by 19 publications

References 45 publications

Kinematics of primate midfoot flexibility

Kinematics of primate midfoot flexibility

Calcaneal robusticity in Plio-Pleistocene hominins: Implications for locomotor diversity and phylogeny

Multivariate analysis of variations in intrinsic foot musculature among hominoids

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