Quantification of the path of center of pressure (COP) using an F-scan in-shoe transducer.

By tracking the path of the center of pressure (COP) during the stance phase, the balance and pattern of progression can be determined. The path of COP is frequently used in clinical practice, although it is not quantified. In this study, an F-scan pressure sensitive insole system was used to quantify the path of COP. The COP of initial contact and the average during the stance phase corresponded to the center of the heel and to the center of the total plantar surface, respectively. The COP displacement corresponded to 83% of foot contact length and 18% of forefoot contact width. When the longitudinal axis of the insole was plotted as the Y-axis and the transverse axis of the insole as X-axis, the slopes of the COP coordinates during stance phase was 6 degrees inward. Velocities of the COP during each functional rocker action were even and 22-27 cm/s. The changes of quantified COP parameters according to the biomechanical alteration of the foot were confirmed by high-heeled gait.

[1]  Opila-Correia Ka.  Kinematics of high-heeled gait with consideration for age and experience of wearers. , 1990 .

[2]  C. I. Franks,et al.  The Measurement of Pressures under the Foot , 1982, Foot & ankle.

[3]  Snow Re,et al.  High heeled shoes: their effect on center of mass position, posture, three-dimensional kinematics, rearfoot motion, and ground reaction forces. , 1994 .

[4]  T. Kernozek,et al.  Reliability of an In-Shoe Pressure Measurement System During Treadmill Walking , 1996, Foot & ankle international.

[5]  R. D. McLeish,et al.  An investigation of the centres of pressure under the foot while walking. , 1975, The Journal of bone and joint surgery. British volume.

[6]  R. P. Schwartz,et al.  A QUANTITATIVE ANALYSIS OF RECORDED VARIABLES IN THE WALKING PATTERN OF "NORMAL" ADULTS. , 1964, The Journal of bone and joint surgery. American volume.

[7]  Opila-Correia Ka.  Kinematics of high-heeled gait. , 1990 .

[8]  J. Fleiss.  The design and analysis of clinical experiments , 1987 .

[9]  L. Feiwell,et al.  A Method for Measuring Foot Pressures Using a High Resolution, Computerized Insole Sensor: The Effect of Heel Wedges on Plantar Pressure Distribution and Center of Force , 1992, Foot & ankle.

[10]  H. Elftman.  A cinematic study of the distribution of pressure in the human foot , 1934 .

[11]  J. Fleiss,et al.  Intraclass correlations: uses in assessing rater reliability. , 1979, Psychological bulletin.

[12]  R. Mann,et al.  Biomechanics of walking, running, and sprinting , 1980, The American journal of sports medicine.

[13]  A. Esquenazi,et al.  Measurement of Dynamic Pressures at the Shoe-Foot Interface During Normal Walking with Various Foot Orthoses Using the FSCAN System , 1996, Foot & ankle international.

[14]  M. Kljajić,et al.  The use of ground reaction measuring shoes in gait evaluation. , 1987, Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics.

[15]  R A Brand,et al.  The effects of walking velocity and age on hip kinematics and kinetics. , 1978, Clinical orthopaedics and related research.

[16]  L. Klenerman,et al.  Effect of the shoe on plantar foot pressures. , 1995, Acta orthopaedica Scandinavica.

[17]  G. Harris,et al.  A Comparison Study of Plantar Foot Pressure in a Standardized Shoe, Total Contact Cast, and Prefabricated Pneumatic Walking Brace , 1997, Foot & ankle international.

[18]  R. Soames.  Foot pressure patterns during gait. , 1985, Journal of biomedical engineering.

[19]  J. M. Rothstein.  Measurement in physical therapy , 1985 .

[20]  M Lord,et al.  Pressure redistribution by molded inserts in diabetic footwear: a pilot study. , 1994, Journal of rehabilitation research and development.

[21]  J. Hughes,et al.  Foot pressure measurement: a review of clinical findings. , 1986, Journal of biomedical engineering.

[22]  Scherer Pr,et al.  The center of pressure index in the evaluation of foot orthoses in shoes. , 1994, Clinics in podiatric medicine and surgery.

[23]  J. Perry,et al.  Gait Analysis , 2024 .

[24]  Leslie Klenerman,et al.  A Clinician's View of Foot Pressure: A Comparison of Three Different Methods of Measurement , 1987, Foot & ankle.

[25]  R. Donatelli.  The Biomechanics of the Foot and Ankle , 1995 .

[26]  H. H. Merrifield.  Female gait patterns in shoes with different heel heights. , 1971, Ergonomics.

[27]  G F Harris,et al.  Procedures for gait analysis. , 1994, Archives of physical medicine and rehabilitation.

[28]  The oscillographic recording and quantitative definition of functional disabilities of human locomotion. , 1949, Archives of physical medicine and rehabilitation.