Neuromuscular Performance of the Aged

  • Anthony A. Vandervoort
  • Karen M. Hill

Abstract

Motor activity is an integral part of human behavior, as it is the common form of expression to sensory stimulation and our mode of interaction with the environment around us. We depend on muscular actions controlled by the nervous system to attain our upright posture in sitting and standing and to walk in our two legged fashion. Even our verbal communication is generated by the motor commands. In addition, we have a rich variety of postures, gestures, and facial movements associated with human interaction, which are identified as “body language.”

Keywords

Fatigue Arthritis Torque Dopamine Osteoporosis 

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References

  1. Agre, J.C., Pierce, L.E., Raab, D.M., McAdams, M., & Smith, E.L. (1988). Light resistance and stretching exercise in elderly women: effect upon strength. Archives of Physical Medicine and Rehabilitation, 69, 273–276.Google Scholar
  2. Aisenbrey, J.A. (1987). Exercise in the prevention and management of osteoporosis. Physical Therapy, 67, 1100–1104.Google Scholar
  3. Andrews, K., Brocklehurst, J.C., Richards, B., Laycock, P.F. (1984). The influence of age on the clinical presentation and outcome of stroke. International Rehabilitation Medicine, 6, 49–53.Google Scholar
  4. Aniansson, A., Hedberg, M., Henning, G., & Grimby, G. (1986). Muscle morphology, enzymatic activity and muscle strength in elderly men: A follow-up study. Muscle & Nerve, 9, 585–591.Google Scholar
  5. Aniansson, A., Zetterberg, C., Hedberg, M. (1984). Impaired muscle function with aging: A background factor in the incidence of fractures of the proximal end of the femur. Clinical orthopedics, 191, 192–210.Google Scholar
  6. Asmussen, E. (1979). Muscle fatigue. Medicine and Science in Sports, 11, 313–321.Google Scholar
  7. Badke, M.B., & DiFabio, R.P. (1985). Effects of postural bias during support surface displacements and rapid arm movements. Physical Therapy, 65, 1490–1495.Google Scholar
  8. Badke, M.B., & Duncan, P.W. (1983). Patterns of rapid motor responses during postural adjustments when standing in healthy subjects and hemiplegic patients. Physical Therapy, 63, 13–20.Google Scholar
  9. Badke, M.B., Duncan, P.W., & DiFabio, R.P. (1987). Influence of prior knowledge on automatic and voluntary postural adjustments in healthy and hemiplegic subjects. Physical Therapy, 67, 1495–1500.Google Scholar
  10. Baylor, A.M. & Spirduso, W.W. (1988). Systematic aerobic exercise and components of reaction time in older women. Journal of Gerontology, 43, 121–126.Google Scholar
  11. Bazalgette, D., Zattara, M., Bathien, N., Bouisset, S., & Rondot, P. (1986). Postural adjustments associated with rapid voluntary arm movements in patients with Parkinson’s disease. Advances in Neurology, 45, 371–374.Google Scholar
  12. Belanger, A.Y., & McComas, A.J. (1981). Extent of motor unit activation during effort. Journal of Applied Physiology, 51, 1131–1135.Google Scholar
  13. Bergstrom, G., Aniansson, A., Bielle, A., Grimby, G., Lundgren-Lindquist, B., & Svanborg, A. (1985). Functional consequences of joint impairment at age 79. Scandanavian Journal of Rehabilitation Medicine, 17, 183–190.Google Scholar
  14. Berman, P. (1985). Gait problems: Age is only one ingredient. Perspectives in Geriatrics, August, 39–48.Google Scholar
  15. Bobath, B. (1978). Adult hemiplegia: Evaluation and treatment (2nd ed.) London: Heinemann Medical Books.Google Scholar
  16. Bohannon, R.W. (1986a). Relationship between static strength and various other measures in hemiparetic stroke patients. International Journal of Rehabilation Medicine, 8, 125–128.Google Scholar
  17. Bohannon, R.W. (1986b). Strength of lower limb related to gait velocity and cadence in stroke patients. Physiotherapy Canada, 38, 204–206.Google Scholar
  18. Bohannon, R.W. (1987). Gait performance of hemiparetic stroke patients: Selected variables. Physical Therapy, 68, 777–781.Google Scholar
  19. Bohannon, R.W. (1988). Determinants of transfer capacity in patients with hemiparesis. Physiotherapy Canada, 40, 236–239.Google Scholar
  20. Bohannon, R.W., Larkin, P.A., Cook, A.C., Gear, J., & Singer, J. (1984). Decrease in timed balance scores with aging. Physical Therapy, 64, 1067–1070.Google Scholar
  21. Borkan, G.A., Hults, D.E., Gerzof, S.G., Robbins, A.H., & Silbert C.K. (1983). Age changes in body composition revealed by computed tomography. Journal of Gerontology, 38, 673–677.Google Scholar
  22. Borner, J.A., Dilworth, B.B., & Sullivan, K.M. (1988). Exercise and osteoporosis: A critique of the literature. Physiotherapy Canada, 40, 146–155.Google Scholar
  23. Brandstater, M.E., de Bruin, H., Gowland, C., & Clark, B.M. (1983). Hemiplegic gait: Analysis of temporal variables. Archives of Physical Medicine and Rehabilitation, 64, 583–587.Google Scholar
  24. Brocklehurst, J.C., Robertson, D., & James-Groom, P. (1982). Clinical correlates of sway in old age—sensory modalities. Age and Ageing, 11, 1–10.Google Scholar
  25. Brooks, V.B. (1986). The neural basis of motor control. New York: Oxford University Press.Google Scholar
  26. Brown, W.F., Strong, M.J., & Snow, R. (1988). Methods for estimating numbers of motor units in biceps-brachialis muscles and losses of motor units with aging. Muscle and Nerve, 11, 423–432.Google Scholar
  27. Campbell, M.J., McComas, A.J., & Petito, F. (1973). Physiological changes in ageing muscles. Journal of Neurology, Neurosurgery and Psychiatry, 36, 174–182.Google Scholar
  28. Cape, R.D.T. (1978). Aging: Its complex management. New York: Harper & Row.Google Scholar
  29. Chan, C.Y.W. (1984). Neurophysiological basis underlying the use of resistance to facilitate movement. Physiotherapy Canada, 36, 335–341.Google Scholar
  30. Clarkson, P.M., & Dedrick, M.E. (1988). Exercise-induced muscle damage, repair, and adaptation in old and young subjects. Journal of Gerontology, 43, M91–96.Google Scholar
  31. Clarkson, P.M., Kroll, W., & Melchionda, A.M. (1981). Age, isometric strength, rate of tension development and fiber type composition. Journal of Gerontology, 36, 648–653.Google Scholar
  32. Colebatch, J.G., Gandevia, S.C. & Spira, P.J.(1986). Voluntary muscle strength in hemiparesis: distribution of weakness at the elbow. Journal of Neurology, Neurosurgery & Psychiatry, 49, 1019–1024.Google Scholar
  33. Cordo, P.J., & Nashner, L.M. (1982). Properties of postural adjustments assodated with rapid arm movements. Journal of Neurophysiology, 47, 281–302.Google Scholar
  34. Cunningham, D.A., Morrison, D., Rice, C.L., & Cooke, C. (1987). Aging and isokinetic plantar flexion. European Journal of Applied Physiology, 56, 24–29.Google Scholar
  35. Cunningham, D.A., Rechnitzer, P.A., Pearce, M.E., Donner, A.P. (1982). Determinants of self-selected walking pace across ages 19 to 66. Journal of Gerontology, 37, 560–564.Google Scholar
  36. Davies, C.T.M., Thomas, D.O., & White, M.J. (1986). Mechanical properties of young and elderly human muscle. Acta Medica Scandinavica, 711 (Suppl.), 219–226.Google Scholar
  37. De Jong, R.N. (1979). The Neurologic Examination. Philadelphia: Harper & Row.Google Scholar
  38. Diener, H.C., Ackerman, H., Dichgans, J., & Guschlbauer, B. (1985). Medium-and long-latency responses to displacements of the ankle joint in patients with spinal and central lesions. Electroencephalography and Clinical Neurophysiology, 60, 407–416.Google Scholar
  39. Diener, H.C., Dichgans, J., Bootz, F., & Bacher, M. (1984). Early stabilization of human posture after a sudden disturbance: Influence of rate and amplitude of displacement. Experimental Brain Research, 56, 126–134.Google Scholar
  40. Dietz, V., & Berger, W. (1985). Interlimb coordination of posture in patients with spastic paresis. Brain, 107, 965–978.Google Scholar
  41. Dietz, V., Ketelsen, U.-P., Berger, W., & Quintern, J. (1986). Motor unit involvement in spastic paresis. Relationship between leg muscle activation and histochemistry. Journal of the Neurological Sciences, 75, 89–103.Google Scholar
  42. Dietz, V., Quintern, J., Berger, W., & Schenck, E. (1985). Cerebral potentials and leg muscle EMG responses associated with stance perturbation. Experimental Brain Research, 57, 348–354.Google Scholar
  43. DiFabio, R.P., Badke, M.B., & Duncan, P.W. (1986). Adapting human postural reflexes following localized cerebrovascular lesion: Analysis of bilateral long latency responses. Brain Research, 363, 257–264.Google Scholar
  44. Dornan, J., Fernie, G.R., & Holliday, P.J. (1978). Visual input: Its importance in the control of postural sway. Archives of Physical Medicine and Rehabilitation, 59, 586–591.Google Scholar
  45. Dubo, H.I.C., Peat, M., Winter, D.A., Quanbury, A.O., Hobson, D.A., Steinke, T., & Reimer, G. (1976). Electromyographic temporal analysis of gait: Normal human locomotion. Archives of Physical Medicine and Rehabilitation, 57, 415–420.Google Scholar
  46. Edstrom, L., & Grimby, L. (1986). Effect of exercise on the motor unit. Muscle and Nerve, 9, 104–126.Google Scholar
  47. Era, P., & Heikkinen, E. (1985). Postural sway during standing and unexpected disturbance of balance in random samples of men of different ages. Journal of Gerontology, 40, 287–295.Google Scholar
  48. Essen-Gustavsson, B., & Borges, O. (1986). Histochemical and metabolic characteristics of human skeletal muscle in relation to age. Acta Physiologica Scandinavica, 126, 107–114.Google Scholar
  49. Fernie, G.R., Gryfe, C.I., Holliday, P.J., & Llewellyn, A. (1982). The relationship of postural sway in standing to the incidence of falls in geriatric subjects. Age and Ageing, 11, 11–16.Google Scholar
  50. Finley, F.R., & Cody, K.A. (1970). Locomotive characteristics of urban pedestrians. Archives of Physical Medicine and Rehabilitation, 51, 423–426.Google Scholar
  51. Finley, F.R., Cody, K.A., & Finzie, R.V. (1969). Locomotion patterns in elderly women. Archives of Physical Medicine and Rehabilitation, 50, 140–149.Google Scholar
  52. Fisher, M.B., & Birren, J.E. (1947). Age and strength. Journal of Applied Psychology, 31, 490–497.Google Scholar
  53. Freund, H.-J. (1983). Motor unit and muscle activity in voluntary control. Physiological Reviews, 63, 387–436.Google Scholar
  54. Friedli, W.G., Hallett, M., & Simon, S.R. (1984). Postural adjustments associated with rapid voluntary arm movements. 1. Electromyographic data. Journal of Neurology, Neurosurgery and Psychiatry, 47, 611–622.Google Scholar
  55. Fries, J.F., & Crapo, L.M. (1981). Vitality and aging. San Francisco: W.H. Freeman.Google Scholar
  56. Frontera, W.R., Meredith, C.N., O’Reilly, K.P., Knuttgen, H.G., & Evans, W.J. (1988). Strength conditioning in older men: Skeletal muscle hypertrophy and improved function. Journal of Applied Physiology, 64, 1038–1044.Google Scholar
  57. Gillis, B., Gilroy, K., Lawley, H., Mott, L., & Wall, J.C. (1986). Slow walking speeds in healthy young and elderly females. Physiotherapy Canada, 38, 350–352.Google Scholar
  58. Gordon, M. (1986). Differential diagnosis of weakness—A common geriatric symptom. Geriatrics, 41, 75–80.Google Scholar
  59. Grimby, G. (1988). Physical activity and effects of muscle training in the elderly. Annals of Clinical Research, 20, 62–66.Google Scholar
  60. Grimby, G., Danneskiold-Samsoe, B., Hvid, K., & Saltin, B. (1982). Morphology and enzymatic capacity in arm and leg muscles in 78–82 years old men and women. Acta Physiological Scandinavica, 115, 124–134.Google Scholar
  61. Grimby, G., & Saltin, B. (1983). The ageing muscle. Clinical Physiology, 3, 209–218.Google Scholar
  62. Grisso, J.A. (1989) Exercise. In R.J. Lavizzo-Mourey, S.C. Day, D.F. Diserens, & J.A. Grisso (Eds.), Practicing prevention for the elderly (pp. 75–87). Philadelphia: Hanley & Belfus.Google Scholar
  63. Guimaraes, R.M., & Isaacs, B. (1980). Characteristics of the gait in old people who fall, international Rehabilitation Medicine, 2, 177–180.Google Scholar
  64. Hageman, P.A., & Blanke, D.J. (1986). Comparison of gait of young and elderly women. Physical Therapy, 66, 1382–1397.Google Scholar
  65. Hasselkus, B.R., & Shambes, G.M. (1975). Aging and postural sway in women. Journal of Gerontology, 30, 661–667.Google Scholar
  66. Hayes, K.C. (1982). Biomechanics of postural control. Exercise and Sport Science Review, 10, 363–391.Google Scholar
  67. Hellebrandt, F.A. (1938). Standing as a geotropic reflex. American Journal of Physiology, 121, 471–474.Google Scholar
  68. Hellebrandt, F.A., Tepper, R.H., Braun, G.L., & Elliott, M.C. (1938). The location of the cardinal anatomical orientation planes passing through the center of weight in young adult women. American Journal of Physiology, 121, 465–470.Google Scholar
  69. Himann, J.E., Cunningham, D.A., Rechnitzer, P.A., & Paterson, D.H. (1988). Age-related changes in speed of walking. Medicine and Science in Sports and Exercise, 20, 161–166.Google Scholar
  70. Horak, F.B. (1987). Clinical measurement of postural control in adults. Physical Therapy, 67, 1881–1885.Google Scholar
  71. Horak, F.B., Esselman, P., Anderson, M.E., & Lynch, M.K. (1984). The effects of movement velocity, mass displaced, and task certainly on associated postural adjustment made by normal and hemiplegic individuals. Journal of Neurology, Neurosurgery and Psychiatry, 47, 1020–1028.Google Scholar
  72. Houtz, S.J., & Fischer, F.J. (1961). Function of leg muscles acting on foot as modified by body movements. Journal of Applied Physiology, 16, 597–605.Google Scholar
  73. Hughes, G.R.V. (1979). Osteoarthritis. Age and Ageing, 8, 1–8.Google Scholar
  74. Hunter, I.W., & Kearney, R.E. (1981). Respiratory components of human postural sway. Neuroscience Letters, 25, 155–159.Google Scholar
  75. Imms, F.J., & Edholm, O.G. (1979). The assessment of gait and mobility in the elderly. Age and Ageing, 8 (Suppl.), 261–267.Google Scholar
  76. Imms, F.J., & Edholm, O.G. (1981). Studies of gait and mobility in the elderly. Age and Ageing, 10, 147–156.Google Scholar
  77. Isaacs, B. (1978). Are falls a manifestation of brain failure? Age and Ageing, 7 (Suppl.), 79–111.Google Scholar
  78. Jansen, E.C., Vittas, D., Hellberg, S., & Hansen, J. (1982). Normal gait of young and old men and women. Acta Orthopaedica Scandinavica, 53, 193–196.Google Scholar
  79. Jonsson, B., & Steen, B. (1963). Function of the hip and thigh muscles in Romberg’s test and “standing at ease.” An electromyographic study. Acta Morphologica Neerlando-Scandinavica, 5, 269–276.Google Scholar
  80. Joseph, J., & Nightingale, A. (1952). Electromyography of muscles of posture: Leg muscles in males. Journal of Physiology (London), 117, 484–491.Google Scholar
  81. Joseph, J., & Nightingale, A. (1956). Electromyography of muscles of posture: Leg and thigh muscles in women, including the effects of high heels. Journal of Physiology (London), 132, 465–468.Google Scholar
  82. Keenan, M.A., Perry, J., & Jordan, C. (1984). Factors affecting balance and ambulation following stroke. Clinical Orthopaedics and Related Research, 182, 165–171.Google Scholar
  83. Kirshen, A.J., Cape, R.D.T., Hayes, K.C., & Spencer, J.D. (1984). Postural sway and cardiovascular parameters associated with falls in the elderly. Journal of Clinical and Experimental Gerontology, 6, 291–307.Google Scholar
  84. Knutsson, E. (1972). An analysis of parkinsonian gait. Brain, 95, 475–486.Google Scholar
  85. Larsson, L., Grimby, G., & Karlsson, J. (1979). Muscle strength and speed of movement in relation to age and muscle morphology. Journal of Applied Physiology, 46, 451–456.Google Scholar
  86. Lee, P., Helewa, A., Smythe, H.A., Bombardier, C., & Goldsmith, C.H. (1985). Epidemiology of musculoskeletal disorders (complaints) and related disability in Canada. Journal of Rheumatology, 12, 1169–1173.Google Scholar
  87. Lee, W.A., Deming, L., & Sahgal, V. (1988). Quantitative and clinical measures of static standing balance in hemiparetic and normal subjects. Physical Therapy, 68, 970–976.Google Scholar
  88. Lexell, J., Taylor, C.C., & Sjostrom, M. (1988). What is the cause of the ageing atrophy? Total number, size and proportion of different fiber types studied in whole vastus lateralis muscle from 15- to 83-year-old men. Journal of the Neurological Sciences, 84, 275–294.Google Scholar
  89. Lichenstein, M.J., Shields, S.L., Shiavi, R.G., & Burger, M.C. (1988). Clinical determinants of biomechanics platform measures of balance in aged women. Journal of the American Geriatrics Society, 36, 996–1002.Google Scholar
  90. Lichenstein, M.J., Shields, S.L., Shiavi, R.G., & Burger, M.C. (1989). Exercise and balance in aged women: A pilot controlled clinical trial. Archives of Physical Medicine & Rehabilitation, 70, 138–143.Google Scholar
  91. Lucy, S.D., & Hayes, K.C. (1985). Postural sway profiles: Normal subjects and subjects with cerebellar ataxia. Physiotherapy Canada, 37, 140–148.Google Scholar
  92. MacLennan, W.J., Timothy, J.I., & Hall, M.R.P. (1980). Vibration sense, proprioception and ankle reflexes in old age. Journal of Clinical and Experimental Gerontology, 2, 159–171.Google Scholar
  93. Markham, C.H. (1987). Vestibular control of muscular tone and posture. Canadian Journal of Neurological Sciences, 14, 493–496.Google Scholar
  94. Marsden, C.D., Merton, P.A., & Morton, H.B. (1981). Human postural responses. Brain, 104, 513–534.Google Scholar
  95. Martin, A.D., & Houston, C.S. (1987). Osteoporosis, calcium and physical activity. Canadian Medical Association Journal, 136, 587–592.Google Scholar
  96. Mathias, S., Nayak, U.S.L., & Isaacs, B. (1986). Balance in elderly patients: The “get-up and go” test. Archives of Physical Medicine and Rehabilitation, 67, 387–389.Google Scholar
  97. Mathiowetz, V., Kashman, N., Volland, G., Weber, K., Dowe, M., & Rogers, S. (1985). Grip and pinch strength: Normative data for adults. Archives of Physical Medicine and Rehabilitation, 66, 69–72.Google Scholar
  98. McDonagh, M.J.N., White, M.J., & Davies, C.T.M. (1984). Different effects of ageing on the mechanical properties of arm and leg muscles. Gerontology, 30, 49–54.Google Scholar
  99. Melvill Jones, G., & Watt, G. D. (1971). Observations on the control of stepping and hopping movements in man. Journal of Physiology (London), 219, 709–727.Google Scholar
  100. Morris, J.C., Rubin, E.H., Morris, E.J., & Mandel, S.A. (1987). Senile dementia of the Alzheimer’s type: An important risk factor for serious falls. Journal of Gerontology, 45, 412–417.Google Scholar
  101. Murray, M.P. (1967). Gait as a total pattern of movement. American Journal of Physical Medicine, 46, 290–330.Google Scholar
  102. Murray, M.P., Duthie, E.H., Gambert, S.R., Sepic, S.B., & Mollinger, L.A. (1985). Age-related differences in knee muscle strength in normal women. Journal of Gerontology, 40, 275–280.Google Scholar
  103. Murray, M.P., Gardner, G.M., Mollinger, L.A., & Sepic, S.B. (1980). Strength of isometric contractions. Knee muscles of men aged 20 to 86. Physical Therapy, 60, 412–419.Google Scholar
  104. Murray, M.P., Kroy, R.C., & Clarkson, B.H. (1969). Walking patterns in healthy old men. Journal of Gerontology, 24, 169–178.Google Scholar
  105. Murray, M.P., Kroy, R.C., & Sepic, S.B. (1970). Walking patterns of normal women. Archives of Physical Medicine and Rehabilitation, 51, 637–650.Google Scholar
  106. Murray, M.P., Seireg, A.A., & Sepic, S.B. (1975). Normal postural stability and steadiness: Quantitative assessment. Journal of Bone and Joint Surgery, 57, 510–516.Google Scholar
  107. Myint, A. (1989). Concentric and Eccentric Strength Evaluation of Knee Extension and Flexion in Elderly Men. Master of Science Thesis, Department of Physical Therapy, University of Western Ontario. London, Canada.Google Scholar
  108. Nashner, L.M. (1976). Adapting reflexes controlling the human posture. Experimental Brain Research, 26, 59–72.Google Scholar
  109. Nashner, L.M. (1977). Fixed patterns of rapid postural responses among leg muscles during stance. Experimental Brain Research, 30, 13–24.Google Scholar
  110. Nashner, L.M., & Cordo, P.J. (1981). Relation of automatic postural responses and reaction-time voluntary movements of human leg muscles. Experimental Brain Research, 43, 395–405.Google Scholar
  111. Nashner, L.M. & McCollum, G. (1985). The organization of human postural movements: A formal basis and experimental synthesis. Behavioral and Brain Sciences, 8, 135–172.Google Scholar
  112. Nashner, L.M., Woollacott, M., & Turna, G. (1979). Organization of rapid responses to postural and locomotor-like perturbations of standing man. Experimental Brain Research, 36, 463–476.Google Scholar
  113. Norre, M.E., Forrez, G., & Beckers, A. (1987). Posturography measuring instability in vestibular dysfunction in the elderly. Age and Ageing, 16, 89–93.Google Scholar
  114. O’Brien, M., Power, K., Sanford, S., Smith, K., & Wall, J. (1983). Temporal gait patterns in healthy young and elderly females. Physiotherapy Canada, 35, 323–326.Google Scholar
  115. Oddsson, O., & Thorstensson, A. (1987). Fast voluntary trunk flexion movements in standing: Motor patterns. Acta Physiological Scandinavica, 129, 93–106.Google Scholar
  116. Oertel, G. (1986). Changes in human skeletal muscles due to ageing. Acta Neuropathologica, 69, 309–313.Google Scholar
  117. Olney, R.K. (1985). Age-related changes in peripheral-nerve function. Geriatric Medicine Today, 4, 76–86.Google Scholar
  118. Overstall, P.W., Exton-Smith, A.N., Imms, F.J., & Johnson, A.L. (1977). Falls in the elderly related to postural imbalance. British Medical Journal, 1, 261–264.Google Scholar
  119. Pack, D.R., Wolfson, L.I., Amerman, P., Whipple, R., & Kaplan, J.G. (1985). Peripheral nerve abnormalities and falling in the elderly. Neurology, 35 (Suppl.), 79.Google Scholar
  120. Peat, M., Dubo, H.I.C., Winter, D.A., Quanbury, A.O., Steinke, T., & Grahame, R. (1976). Electromyographic temporal analysis of gait: Hemiplegic locomotion. Archives of Physical Medicine and Rehabilitation, 57, 421–425.Google Scholar
  121. Petrella, R.J., Cunningham, D.A., Vandervoort, A.A., & Paterson, D.H. (1989). Comparison of twitch potentiation in the gastrocnemius of young and elderly men. European Journal of Applied Physiology, 58: 395–399.Google Scholar
  122. Pickles, B. (1988). Preventive role of the physical therapist in the management of osteoporosis. In M. Peat (Ed.), Current Physical Therapy (pp. 250–253). Toronto: BC Decker.Google Scholar
  123. Portnoy, H., & Morin, F. (1956). Electromyographic study of postural muscles in various positions and movements. American Journal of Physiology, 186, 122–126.Google Scholar
  124. Potvin, A.R., Syndulko, K., Tourtellote, W.W., Lemon, J.A., & Potvin, J.H. (1980). Human neurologic function and the aging process. Journal of the American Geriatrics Society, 28, 1–9.Google Scholar
  125. Poulin, M.J., Vandervoort, A.A., Paterson, D.H., Kramer, J.F. (1989). Eccentric and concentric strength of knee and elbow extension in young and elderly men. Canadian Journal of Sport Sciences, 14, Supplement.Google Scholar
  126. Rice, C.L., Cunningham, D.A., Paterson, D.H., & Lefcoe, M.S. (1989). Arm and leg composition determined by computed tomography in young and elderly men. Clinical Physiology, 9, 207–220.Google Scholar
  127. Rice, C.L., Pettigrew, F.P., Noble, E.G., & Taylor, A.W. (1988). The fibre composition of skeletal muscle. In J.R. Poortmans (Ed.), Medicine and sport science: Vol. 27. Principles of exercise biochemistry (pp. 22–29). Basel: Karger.Google Scholar
  128. Rogers, M.W., Kukulka, C.G., & Soderberg, G.L. (1987). Postural adjustments preceding rapid arm movements in Parkinsonian subjects. Neuroscience Letters, 7, 246–251.Google Scholar
  129. Rosenhall, U. (1973). Degenerative patterns in the aging human vestibular neuroepithelia. Acta Otolaryngica, 76, 208–220.Google Scholar
  130. Rubenstein, L.Z., Robbins, A.S., Schulman, B.L., Rosado, J., Ostereveil, D., & Josephson, K.R. (1988). Falls and instability in the elderly. Journal of the American Geriatrics Society, 36, 266–278.Google Scholar
  131. Sabin, T.D. (1982). Biological aspects of falls and mobility in the elderly. Journal of the American Geriatrics Society, 30, 51–58.Google Scholar
  132. Schaumburg, H.H., Spencer, P.S., & Ochoa, J. (1983). The aging human peripheral nervous system. In R. Katzman & R. Terry (Eds.), The neurology of aging. Philadelphia: F.A. Davis.Google Scholar
  133. Scheibel, A.B. (1985). Falls, motor dysfunction, and correlative neurohistologic changes in the elderly. Clinics in Geriatric Medicine, 1, 671–676.Google Scholar
  134. Sheldon, J.H. (1960). On the natural history of falls in old age. British Medical Journal, 2, 1685–1690.Google Scholar
  135. Sheldon, J.H. (1963). The effect of age on the control of sway. Gerontologica Clinica, 5, 129–136.Google Scholar
  136. Shephard, R.J. (1969). The working capacity of the older employee. Archives of Environmental Health, 18, 982–986.Google Scholar
  137. Smith, J.W. (1957). The forces operating at the human ankle joint during standing. Journal of Anatomy, 91, 545–564.Google Scholar
  138. Soames, R.W., & Atha, J. (1981). The role of the antigravity musculature during quiet standing in man. European Journal of Applied Physiology, 47, 159–167.Google Scholar
  139. Sorock, G.S., Bush, T.L., Golden, A.L., Fried, L.P., Breuer, B., & Hale, W.E. (1988). Physical activity and fracture risk in a free-living elderly cohort. Journal of Gerontology, 43, M134-M139.Google Scholar
  140. Stamford, B.A. (1988). Exercise and the elderly. Exercise & Sports Sciences Reviews, 16, 341–378.Google Scholar
  141. Stelmach, G.E., & Worringham, C.J. (1985). Sensorimotor deficits related to postural stability. Clinics in Geriatric Medicine, 1, 679–694.Google Scholar
  142. Stones, M.J., & Kozma, A. (1987). Balance and age in the sighted and blind. Archives of Physical Medicine and Rehabilitation, 68, 85–89.Google Scholar
  143. Thorstensson, A., Oddsson, L., & Carlson, H. (1985). Motor control of voluntary trunk movements in standing. Acta Physiological Scandanavica, 125, 309–321.Google Scholar
  144. Tinetti, M.E. (1986). Performance-oriented assessment of mobility problems in elderly patients. Journal of the American Geriatrics Society, 34, 119–126.Google Scholar
  145. Tinetti, M.E., Williams, T.F., & Mayewski, R. (1986). Fall risk index for elderly patients based on number of chronic disabilities. American Journal of Medicine, 80, 429–434.Google Scholar
  146. Tobis, J.S., Reinsch, S., Swanson, J.M., Byrd, M., & Scharf, T. (1985). Visual perception dominance of fallers among community-dwelling older adults. Journal of the American Geriatrics Society, 33, 330–333.Google Scholar
  147. Vandervoort, A.A. (1988). Maintenance of mobility in the elderly. In M. Peat (Ed.) Current Physical Therapy (pp. 246–249). Toronto: B.C. Decker.Google Scholar
  148. Vandervoort, A.A., & Hayes, K.C. (1989). Plantarflexor muscle function in young and elderly women. European Journal of Applied Physiology, 58, 389–394.Google Scholar
  149. Vandervoort, A.A., Hayes, K.C., & Belanger, A.Y. (1986). Strength and endurance of skeletal muscle in the elderly. Physiotherapy Canada, 38, 167–173.Google Scholar
  150. Vandervoort, A.A., Hill, K.H., Sandrin, M., & Vyse, W.M. (in press). Mobility impairment and falling in the elderly. Physiotherapy Canada. Google Scholar
  151. Vandervoort, A.A., Kramer, J.F., & Wharram, E.R. (in press). Eccentric knee strength of elderly females. Journal of Gerontology. Google Scholar
  152. Vandervoort, A.A., & McComas, A.J. (1986). Contractile changes in opposing muscles of the human ankle joint with aging. Journal of Applied Physiology, 61, 361–367.Google Scholar
  153. Vandervoort, A.A., & Mick Jones, N.S. (1988). Management of the geriatric patient. In M. Peat (Ed.) Current physical therapy (pp. 250–253). Toronto: B.C. Decker.Google Scholar
  154. Visser, H. (1983). Gait and balance in senile dementia of Alzheimer’s type. Age and Ageing, 12, 296–301.Google Scholar
  155. Wall, J.C., & Ashburn, A. (1979). Assessment of gait disability in hemiplegics. Hemiplegic gait. Scandanavian Journal of Rehabilitation Medicine, 11, 95–103.Google Scholar
  156. Wall, J.C., & Turnbull, G.I. (1986). Gait asymmetries in residual hemiplegia. Archives of Physical Medicine and Rehabilitation, 67, 550–553.Google Scholar
  157. Weiss, P.L., Kearney, R.E., & Hunter, I.W. (1986). Position dependence of ankle joint dynamics: II. Active mechanics. Journal of Biomechanics, 19, 737–751.Google Scholar
  158. Whipple, R.H., Wolfson, L.I., & Amerman, P.M. (1987). The relationship of knee and ankle weakness to falls in nursing home residents: An isokinetic study. Journal of the American Geriatrics Society, 35, 13–20.Google Scholar
  159. Wigley, F.M. (1984). Osteoarthritis: Practical management in older patients. Geriatrics, 39, 101–120.Google Scholar
  160. Wild, D., Nayak, U.S.L., & Isaacs, B. (1981). Prognosis of falls in old people at home. Journal of Epidemiology and Community Health, 35, 200–204.Google Scholar
  161. Winter, D.A. (1987). Balance and posture in human walking. Engineering in Medicine and Biology, 6, 6–11.Google Scholar
  162. Wolfson, L.I., Whipple, R., Amerman, P., Kaplan, J., & Kleinberg, A. (1985). Gait and balance in the elderly. Two functional capacities that link sensory and motor ability to falls. Clinics in Geriatric Medicine, 1, 649–655.Google Scholar
  163. Wolfson, L.I., Whipple, R., Amerman, P., & Kleinberg, A. (1986). Stressing the postural response. A quantitative method for testing balance. Journal of the American Geriatrics Society, 34, 845–850.Google Scholar
  164. Woodhull, A.M., Maltrud, K., & Mello, B.L. (1985). Alignment of the human body in standing. European Journal of Applied Physiology, 54, 109–115.Google Scholar
  165. Woollacott, M.H., Bonnet, M., & Yabe, K. (1984). Preparatory process for anticipatory postural adjustments: Modulation of leg muscles reflex pathways during preparation for arm movements in standing man. Experimental Brain Research, 55, 263–271.Google Scholar
  166. Woollacott, M.H., Shumway-Cook, A., & Nashner, L.M. (1982). Postural reflexes and aging. In J.A. Mortimer, F.J. Pirozzolo, & G.J. Maletta (Eds.), The aging motor system (pp. 98–119). New York: Praeger.Google Scholar
  167. Woollacott, M.H., Shumway-Cook, A., & Nashner, L.M. (1986). Aging and posture control: Changes in sensory organization and muscular coordination, International Journal of Aging and Human Development, 23, 97–114.Google Scholar
  168. Wright, B.M. (1971). A simple mechanical ataxia-meter. Journal of Physiology (London), 218, 27P.Google Scholar
  169. Wyke, B. (1979). Conference on the Ageing Brain. Cervical articular contributions to posture and gait: Their relation to senile dysequilibrium. Age and Ageing, 8, 251–257.Google Scholar
  170. Young, A., Stokes, M., & Crowe, M. (1984). Size and strength of the quadriceps muscles of old and young women. European Journal of Clinical Investigation, 14, 282–287.Google Scholar
  171. Young, A., Stokes, M., & Crowe, M. (1985). The size and strength of the quadriceps muscles of old and young men. Clinical Physiology, 5, 145–154.Google Scholar

Copyright information

© Springer-Verlag New York Inc. 1990

Authors and Affiliations

  • Anthony A. Vandervoort
  • Karen M. Hill

There are no affiliations available

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