The plantar pressure distributions for a large heterogeneous sample of feet (N = 107) were collected during barefoot standing using a capacitance mat. From these data, the function of the foot during standing was characterized. Peak pressures under the heel (139 kPa) were, on average, 2.6 times greater than forefoot pressures (53 kPa). Forefoot peak pressures were usually located under the second or third metatarsal heads. No significant relationship was found between body weight and the magnitude of peak pressure. The concepts of a transverse arch at the level of the metatarsal heads and a “tripod” theory of load distribution were not substantiated by this study. Load distribution analysis showed that the heel carried 60%, the midfoot 8%, and the forefoot 28% of the weightbearing load. The toes were only minimally involved in the weightbearing process. Examples of unusual distributions are shown; finally, a checklist is provided to aid the clinician in evaluating plantar pressure findings.
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References
1.
. ArcanM.BrullM. A.: A fundamental characteristic of the human body and foot, the foot ground pressure pattern. J. Biomech., 9: 453–457, 1976.
2.
. ArcanM.BrullM. A.: Mechanical parameters describing the standing posture, based on the foot-ground pressure pattern. In Biomechanics, Vol. V-B. AsmussenE.JorgensenK. (eds.), Baltimore, University Park Press, 1976, pp. 415–425.
3.
. BettsR. P.FranksC. I.DuckworthT.: Analysis of pressures and loads under the foot. Part I: Quantitation of the static distribution using the PET computer. Clin. Phys. Physiol. Meas., 1: 101–112, 1980.
4.
. BettsR. P.FranksC. I.DuckworthT.BurkeJ.: Static and dynamic foot-pressure measurements in clinical orthopedics. Med. Biol. Eng. Comput., 18: 674–684, 1980.
5.
. BrandP. W.: The diabetic foot. In Diabetes Mellitus: Theory and Practice, 3rd ed. EllenbergM.RifkinH. (eds.), New York, Medical Examination Publishers, 1983.
6.
. CavanaghP. R.RodgersM. M.: Pressure distribution under the human foot. In Biomechanics: Current Interdisciplinary Research. PerrenS. M.SchneiderE. (eds.), Boston, Martinus Nijhoff Publishers, 1984, pp. 87–95.
7.
. CavanaghP. R.RodgersM. M.: The arch index: A useful measure from footprints. J. Biomech., in press.
8.
. ClarkeT. E.: The pressure distribution under the foot during barefoot walking. Unpublished doctoral thesis, The Pennsylvania State University, 1980.
9.
. DicksonF. D.DiveleyR. L.: Functional Disorders of the Foot, 3rd ed. Philadelphia, J. B. Lippincott, 1953.
10.
. DuckworthT.BettsR. P.FranksC. I.BurkeJ.: The measurement of pressures under the foot. Foot Ankle, 3: 130–141, 1982.
. GrieveD. W.RashdiT.: Pressures under normal feet in standing and walking as measured by foil pedobarography. Ann. Rheum. Dis., 43: 816–818, 1984.
13.
. HellebrandtF. A.BraunG. L.: The influence of sex and age on the postural sway of man. A. J. Phys. Anthropol., 24: 347–360, 1939.
14.
. HennigE. M.: Pressure distribution under the impacting human foot during expected and unexpected falls. Unpublished doctoral thesis, The Pennsylvania State University, 1984.
15.
. JonesR. W.: The human foot. An experimental study of its mechanics and the role of its muscles and ligaments in the support of the arch. Am. J. Anat., 68: 1–39, 1941.
16.
. KapandjiI. A.: The Physiology of the Joints. New York, Churchill Livingstone, 1970.
17.
. LordM.: Foot pressure measurement: a review of methodology. J. Biomed. Eng., 3: 91–99, 1981.
18.
. MinnsR. J.CraxfordA. D.: Pressure under the forefoot in rheumatoid arthritis. Clin. Orthop., 187: 235–242, 1984.
19.
. MortonD. J.: The Human Foot: Its Evolution, Physiology, and Functional Disorders. New York, Hafner, 1935.
20.
. MortonD. J.: Human Locomotion and Body Form: a Study of Gravity and Man. Baltimore, Williams 8#x38; Wilkins, 1953.
21.
. NicolK.HennigE. M.: Measurement of pressure distribution by means of a flexible, large-surface mat. In Biomechanics, Vol. VI-A. AsmussenE.JorgensenK. (eds.), Baltimore, University Park Press, 1978, pp. 374–380.
22.
. SnyderR. G.SchneiderL. W.OwingsC. L.ReynoldsH. M.GolumbD. H.SchorkM. A.: Anthropometry of infants, children and youths to age 18. Report UM-HSRI-77–17. Highway Safety Research Institute, University of Michigan, 1977.
23.
. SteindlerA.: Kinesiology of the Human Body. Springfield, Charles C Thomas, 1955.
24.
. StokesI. A. F.: An analysis of the forces on normal and pathological human feet. Unpublished doctoral thesis, The Polytechnic of Central London, 1975.
25.
. TakataK.KakenoH.WatanabeY.: Time series analysis of postural sway and respiration using an autoregressive model. In Biomechanics. Vol. VIII-A. MatsuiH.KobayashiK. (eds.), Champaign, IL., Human Kinetics Publishers, Inc., 1983, pp. 591–596.
26.
. Wood JonesF.: Structure and Function as Seen in the Human Foot. London, Bailliere, Tindal and Cox, 1944.
27.
. YamamotoT.: Changes in postural stability with special reference to age. In Biomechanics, Vol. VII-A, MoreckiA.FidelusK.KedziorK.WitA. (eds.), Baltimore, University Park Press, 1981, pp. 169–173.
