Effect of Reduced Plantar Sensation on Human Gaits on Various Terrains
Shinichiro Suzuki, Akira Chaki, Kentaro Sekiguchi,
Ming Ding, Hiroshi Takemura, and Hiroshi Mizoguchi
Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
The aim of this study is to investigate the effects of plantar tactile sensibility on the gaits of subjects walking on regular and irregular terrains. We took 3-dimensional measurements of gait motions with a method of ice immersion to reduce plantar sensation, and we compared it to the measurements under normal (not iced) conditions. The subjects were 8 healthy men (21.9±0.8 years old). In these experiments, the subjects immersed their feet in ice water for 30 minutes. We conducted the experiments on even terrain and uneven terrain (48 trials in total per subject). We also measured 6-axis plantar reaction forces of subjects while they were walking. The subjects were 5 healthy young men (22.6±0.5 years old), and there were 25 trials in total. As a result, the results of the gait velocity (p <0.07), step length (p <0.96), and step width (p <0.5) on even terrains did not change significantly after the ice immersion. By contrast, on uneven terrain with a gait of free velocity, the gait velocity (p <0.01) and the step length (p <0.01) significantly decreased after the ice immersion. On uneven terrain with a gait of maximum velocity, the step length (p <0.01) significantly decreased, and the step width variability (p <0.03) increased after the ice immersion. Force variability in the back-to-front direction (p <0.03) and moment variability in pitch axis (p <0.004) significantly decreased, and roll axis moment variability (p <0.05) significantly increased after the ice immersion. These results support the hypothesis that reduced plantar sensation has a significant effect on human gaits, especially when a person is walking on uneven terrain.
Ming Ding, Hiroshi Takemura, and Hiroshi Mizoguchi, “Effect of Reduced Plantar Sensation on Human Gaits on Various Terrains,” J. Robot. Mechatron., Vol.23, No.2, pp. 258-265, 2011.
-  T. Furuna and H. Shimada, “Gait and Fall of Elderly – From the Findings of Epidemiological Research –,” Society of Biomechanism Japan, Vol.30, No.3, 2006.
-  S. Hiromitsu and T. Maeno, “Stick/slip Distribution on the Fingerpad and Response of Tactile Receptors when Human Grasp an Object,” Trans. of the Japan Society of Mechanical Engineers, Series C, Vol.68, No.667, pp. 914-919, 2002.
-  J. K. Richardson, S. B. Thies, T. K. DeMott, and J. A. Ashton-Miller, “A Comparison of Gait Characteristics Between Older Women with and Without Peripheral Neuropathy in Standard and Challenging Environments,” JAGS SEPTEMBER Vol.52, No.9, 2004.
-  E. Eils, S. Behrens, O. Mersa, L. Thorwesten, K. Volker, and D. Rosenbaum, “Reduced plantar sensation causes a cautious walking pattern,” Gait and Posture Vol.20, pp. 54-60, 2004.
-  A. J. Taylor, H. B.Menz, and A.-M. Keenan, “Effects of experimentally induced plantar insensitivity on forces and pressures under the foot during normal walking,” Gait and posture Vol.20, pp. 232-237, 2004.
-  M. A. Nurse and B. M. Nigg, “The effect of changes in foot sensation on plantar pressure and muscle activity,” Clinical Biomechanics Vol.16, pp. 719-727, 2006.
-  W. P. Berg, H. M. Alessio, E. M. Mills, and C. Tong, “Circumstances and consequences of falls in independent communitydwelling older adults,” Oxford Journals, Age and Ageing Vol.26, pp. 261-268, 1997.
-  S. Morioka “Effect of Perceptual Learning Training of Foot Sole on Standing Posture Balance in Elderly,” Theses for research promotion of Health and Medical Science, Vol.21, pp. 107-113, 2006.
-  H. Asai, I. Nara, K. Tachino, K. Fujiwara, and M. Yamashita, “The Effect of Cooled Soles by Cold Air on Standing Postural Control and Extent of Valid Supporting Base,” Physicotherapeutics (Japan), Vol.18, No.1, pp. 19-25, 1991.
-  M. Miwa,“Influence of the Cold Therapy on Nurve Conduction Velocity,” Physicotherapeutics (Japan), Vol.32(supplement 2), p. 234, 2005.
-  A. A. Algafly and K. P. George, “The effect of cryotherapy on nerve conduction velocity, pain threshold and pain tolerance,” British J. of sports medicine, Vol.41, No.6, pp. 365-369, 2007.
-  K. Sekiguchi, S. Suzuki, H. Takemura, and H. Mizoguchi, “Walking Analysis by 6-axis Force Sensor for Simultaneous Measuring of Plantar Deformation,” IEEE SENSORS 2009 CONFERENCE (SENSORS 2009), pp. 177-180, 2009.
-  H. Maruyama, “Motor Function and Gait in the Aged,” Physicotherapeutics (Japan), Vol.14, No.3 , pp. 101-105, 2009.
-  H. B. Menz, L. S. Rord, and R. C. Fitzpatrick, “Age-related differences in walking stability,” Age Ageing, Vol.32, No.2, pp. 137-142, 2003.
-  O. Ishihara, “Cognitive Function and Biomechanism of Elderly,” Society of Biomechanism Japan, Vol.27, No.1, pp. 6-9, 2003.
-  A. Gabell and U. S. L. Nayak, “The Effect of Age on Variability in Gait,” J. of Gerontology, Vol.39, No.6, pp. 662-666, 1984.
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