The human foot serves a dual role during locomotion. It functions at times as a mobile structure and at times as a rigid lever. The human foot shows the hallmarks of an arboreal heritage wherein the foot was primarily a grasping organ. Over the course of the human career the human foot has evolved an elaborate plantar aponeurosis, strong plantar ligaments, longitudinal arches, an enlarged musculus flexor accessorius, an adducted (non-opposable) hallux, a remodeled calcaneocuboid joint, a long tarsus, and shortened toes (II to V). Comparisons of the chimpanzee and human foot allow us to reconstruct the pathway of foot evolution. Fossil foot bones of Homo habilis, dated at 1.76 million years, are remarkably like those of modern humans. Foot bones from Hadar, dated at around 3.5 million years, are remarkably chimpanzee-like, with only incipient human traits. The surprising chimpanzee-like qualities of the Hadar fossils strongly support the use of living apes as models of ancestral pongid-hominid morphotypes.
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References
1.
. AllenL.L.BridgesP.S.EvonD.L.RosenbergK.RussellM.D.SchetatzL.A.VitzthumV.J.WolpoffM.H. Demography and human origins. Am. Anthrop. (in press).
2.
. ArchibaldJ.D.LovejoyCO.HeipleK.G.: Implications of relative robusticity in the Olduvai metatarsus.Am. J. Phys. Anthrop., 37: 93–96, 1972.
3.
. BellC.The Hand—Its Mechanism and Vital Endowments As Evincing Design.London, Wm. Pickering1833.
4.
. Bojsen-MollerF.: Anatomy of the forefoot, normal and pathologic.Clin. Orthop., 142: 10–18, 1979.
5.
. Bojsen-MollerF.: The calcaneocuboid joint and stability of the longitudinal arch at high and low gear push off.J. Anat., 129: 165–176, 1979.
6.
. Bojsen-MollerF.FlagstadK. E.: Plantar aponeurosis and internal architecture of the ball of the foot.J. Anat., 121: 599–611, 1976.
7.
. DayM. H.Guide to Fossil Man, 2nd Ed.Chicago, University of Chicago Press1977.
8.
. DayM.H.NapierJ.R.: Hominid fossils from Bed I, Olduvai Gorge, Tanganyika.Fossil foot bones. Nature, 201: 967–970, 1964.
9.
. DayM.H.WoodB.A.: Functional affinities of the Olduvai hominid 8 talus.Man, 3: 440–455, 1968.
10.
. ElftmanH.ManterJ.: The evolution of the human foot, with especial reference to the joints.J. Anat., 70: 56–67, 1935.
11.
. ElftmanH.ManterJ.: Chimpanzee and human feet in bipedal walking.Am. J. Phys. Anthrop., 20: 69–79, 1935.
12.
. EndoB.KimuraT.: External force of foot in infant walking.J. Fac. Sci. Univ. Tokyo, 4: 103–117, 1972.
13.
. GerberH.StuessiE.ProcterP.The dynamic pattern of different foot types. Paper: III Meeting, European Soc. Biomech., Nijmegen, 1982.
14.
. GratioletL.P.AlixP.H.E.: Recherches sur I'anatomie duTroglodytes aubryi—chimpanzee d'une espece nouvelle. Mem. Mus. Hist. Nat. II. Paris, 1866.
15.
. GregoryW.K.: Were the ancestors of man primitive brachiators? Proc.Am. Philos. Soc, 67: 129–150, 1928.
16.
. HewesG. W.: Food transport and the origin of hominid bipedalism.Am. Anthrop., 63: 687–710, 1961.
17.
. HicksJ.H.: The mechanics of the foot.II. The plantar aponeurosis and the arch. J. Anat., 88: 25–30, 1954.
18.
. HillW.C.O.Primates: Comparative anatomy and taxonomy. V. 4(A). Edinburgh, Edinburgh University Press1960.
19.
. HowellF.C.: Comment on: New Discoveries in Tanganyika: Their Bearing on Hominid Evolution, by P.V. Tobias. Curr. Anthrop., 6: 399–401, 1965.
20.
. HuxleyT.H.Man's Place in Nature.London, Appletons1863.
21.
. HuxleyT.H.: The structure and classification of mammalia.Medical Times and Gazette, 28: 428–429, 1864.
22.
. InmanV.T.The Joints of the Ankle.Baltimore, Williams & Wilkins1976.
23.
. InmanV.T.RalstonH.J.ToddF.Human Walking.Baltimore, Williams & Wilkins1981.
24.
. IshidaH.KimuraT.OkadaM.: Patterns of bipedal walking in anthropoid primates.InSymposium of the 5th Congress of the International Primate Society (1974).KondoS.KawaiM.EharaA.KawamuraS. (eds.), 1975, pp. 287–301.
25.
. JohansonD.C.LovejoyCO.KimbelW.H.WhiteT.D.WardS.CBushM.E.LatimerB.M.CoppensY.: Morphology of the Pliocene Partial Hominid Skeleton (A.L. 288–1) from the Hadar Formation, Ethiopia. Am. J. Phys. Anthrop., 57: 403–451, 1982.
26.
. KeithA.The myology of the catarrhini: a study in evolution. Ph.D. dissertation, University of Aberdeen, 1894.
27.
. KeithA.: Man's posture: its evolution and disorders.Br. Med. J., 1: 451–454, 499–502, 545–548, 587–590, 624–626, 669–672, 1923.
28.
. KimuraT.EndoB.Some observations on the dynamics of the human walking. Proceedings of the 19th Japanese National Congress of Applied Mechanics. Tokyo, Japanese National Committee on Theoretical Applied Mechanics, 1970, pp. 3–7.
29.
. LatimerB.LovejoyCO.JohansonD.C.CoppensY.: Hominid tarsal, metatarsal and phalangeal bones recovered from the Hadar formation: 1974–1977 collections.Am. J. Phys. Anthrop., 57: 701–719, 1982.
. LeakeyM.G.LeakeyR.E.Koobi Foora Research Project. Vol. I. The Fossil Hominids and an Introduction to Their Context, 1968–1974. Oxford, Clarendon Press, 1978.
32.
. LessertisseurJ.JouffroyF.K.: Proportions Longitudines Du Pied Humain Comparees a Celles du Pied Des Autres Primates.Bull. Mem. Soc. Anthrop. Paris, 13: 201–215, 1978.
33.
. LewisO.J.: The comparative morphology of m.Flexor accessorius and the associated long flexor tendons. J. Anat. Lond., 96: 321–333, 1962.
34.
. LewisO.J.: The evolution of the hallucial tarsometatarsal joint in the anthropoidea.Am. J. Phys. Anthrop., 37: 13–34, 1972.
35.
. LisowskiF.P.: Angular growth changes and comparisons in the primate talus.Folia Primatol., 7: 81–97, 1967.
36.
. LothE.: Die aponeurosis plantaris in der Primatenreihe.Gegenbaurs Morphol. Jahrb., 38: 194–322, 1908.
37.
. LothE.: Zur anthropologie der plantar aponeurose.Gegenbaurs Morphol. Jahrb., 48: 83–97, 1914.
38.
. LovejoyCO.: A biochemical review of the locomotor diversity of early hominids.InEarly Hominids of Africa.JollyC.J., (ed.). London, Duckworth1978, pp. 403–429.
39.
. LovejoyCO.: The origin of man.Science, 211: 341–350, 1981.
40.
. MidloC.: Form of hand and foot in primates.Am. J. Phys. Anthrop., 19: 337–389, 1934
41.
. MortonD.J.The Human Foot. Its Evolution, Physiology and Functional Disorders. New York, Columbia University Press, 1935.
42.
. OwenR.: On the osteology of the chimpanzee and orang-utan.Trans. Zool. Soc. Lond., 39: 343–379, 1835.
43.
. ReeserL.A.SusmanR.L.SternJ.T.: Electromyographic studies of the human foot: experimental approaches to hominid evolution.Foot & Ankle, 3: 391–407, 1983.
44.
. ReicherM.: Beitrag zur anthropologie des calcaneus.Arch. Anthrop., N.F.12: 108–133, 1913.
45.
. SchultzA.H.: The relative lengths of the foot skeleton and its main parts in Primates.Symp. Zool. Soc. London, 10: 199–206, 1963.
46.
. SokoloffS.: The muscular anatomy of the chimpanzee foot.Gegenbaurs Morphol. Jahrb., 119: 86–125, 1972.
47.
. SternJ.T.SusmanR.L.: Locomotor anatomy of Australopithecus afarensis.Am. J. Phys. Anthrop., 60: 279–317, 1983.
48.
. StrausW.L.: Fossil evidence of the evolution of erect, bipedal posture.Clin. Orthop., 25: 9–19, 1962.
49.
. SusmanR.L.CreelN.: Functional and morphological affinities of the subadult hand (O.H.7) from Olduvai Gorge. Am. J. Phys. Anthrop., 51: 311–332, 1979.
50.
. SusmanR.L.SternJ.T.: Functional morphology of Homo habilis.Science, 217: 931–934, 1982.
51.
. TysonE.: Orang-outang, siveHomo sylvestris: or, The Anatomy of a Pygmie. London, Dawsons of Pall Mall (reprinted 1966), 1699.
52.
. VokovT.: Les Variations squelettiques du pied chez les Primates et dans races humaines.Bull. Mem. Soc. Anthrop. Paris, 3: 632–708, 5:1–50, 201–331, 1903–1904.
53.
. WashburnS.L.: Behavior and the origin of man.Proc. R. Anthrop. Inst., 3: 21–27, 1967.
54.
. WeidenreichF.: Der Menschenfuss.Zeit. Morph. Anthrop., 22: 51–282, 1922.
55.
. WeidenreichF.: The external tubercle of the human tuber calcanei.Am. J. Phys. Anthrop., 23: 473–487, 1940.
56.
. ZihlmanA.TannerN.: Gathering and the hominid adaptation.InFemale Hierarchies.TigerL.FowlerH. (eds.). Chicago, Beresford Book Service1978.
