Motor unit firing rates and contractile properties in tibialis anterior of young and old men

Journal of Applied Physiology

Volumn 87, Issue 2, 1999, Pages 843-852

  Connelly, Denise M ^a   Rice, Charles L ^a,b   Roos, Martin R ^a   Vandervoort, Anthony A ^a  

^a UNIVERSITY OF WESTERN ONTARIO   (Canada)

^b ST JOSEPH S HEALTH CENTRE   (Canada)

Author keywords

Aging; Dorsiflexors; Intramuscular electromyography; Neuromuscular remodeling; Strength

Indexed keywords

ADULT; AGED; ARTICLE; ELECTROMYOGRAPHY; HUMAN; HUMAN EXPERIMENT; MALE; MOTONEURON; MOTOR UNIT; MUSCLE CONTRACTION; PRIORITY JOURNAL; TIBIALIS ANTERIOR MUSCLE; TORQUE;

EID: 0032816887     PISSN: 87507587     EISSN: None     Source Type: Journal    
DOI: 10.1152/jappl.1999.87.2.843     Document Type: Article

References (48)

1. Bakels, R., and D. Kernell. Matching between motoneurone and muscle unit properties in rat medial gastrocnemius. J. Physiol. (Lond.) 463: 307-324, 1993.
2. Balagopal, P., D. Proctor, and K. Sreekumaran Nair. Sarcopenia and hormonal changes. Endocrine 7: 57-60, 1997.
3. Belanger, A. Y., and A. J. McComas. Extent of motor unit activation during effort. J. Appl. Physiol. 51: 1131-1135, 1981.
4. Bellemare, F., J. J. Woods, R. Johansson, and B. Bigland-Ritchie. Motor-unit discharge rates in maximal voluntary contractions of three human muscles. J. Neurophysiol. 50: 1380-1392, 1983.
5. Bigland-Ritchie, B. R., F. H. Furbush, S. C. Gandevia, and C. K. Thomas. Voluntary discharge frequencies of human motoneurons at different muscle lengths. Muscle Nerve 15: 130-137, 1992.
6. Bigland-Ritchie, B., R. Johansson, O. C. J. Lippold, and J. J. Woods. Contractile speed and EMG changes during fatigue of sustained maximal voluntary contractions. J. Neurophysiol. 50: 313-324, 1983.
7. Borg, J. Properties of single motor units of the extensor digitorum brevis in elderly humans. Muscle Nerve 4: 429-434, 1981.
8. Borg, J., L. Grimby, and J. Hannerz. Axonal conduction velocity and voluntary discharge properties of individual short toe extensor motor units in man. J. Physiol. (Lond.) 277: 143-152, 1978.
9. Campbell, M. J., A. J. McComas, and F. Petito. Physiological changes in ageing muscles. J. Neurol. Neurosurg. Psychiatry 36: 174-182, 1973.
10. Colton, T. Statistics in Medicine. Boston, MA: Little, Brown, 1974.
11. Dipietro, L., C. J. Caspersen, A. M. Ostfeld, and E. R. Nadel. A survey for assessing physical activity among older adults. Med. Sci. Sports Exerc. 25: 628-642, 1993.
12. Doherty, T. J., and W. F. Brown. Age-related changes in the twitch contractile properties of human thenar motor units. J. Appl. Physiol. 82: 93-101, 1997.
13. Doherty, T. J., A. A. Vandervoort, and W. F. Brown. Effects of ageing on the motor unit: a brief review. Can. J. Appl. Physiol. 18: 331-358, 1993.
14. Duchateau, J., and K. Hainaut. Effects of immobilization on contractile properties, recruitment and firing rates of human motor units. J. Physiol. (Lond.) 422: 55-65, 1990.
15. Eccles, J. C., R. M. Eccles, and A. Lundberg. The action potentials of the alpha motoneurones supplying fast and slow muscles. J. Physiol. (Lond.) 142: 275-291, 1958.
16. Englehardt, J. K., F. R. Morales, J. Yamuy, and M. H. Chase. Cable properties of spinal motoneurons in adult and aged cats. J. Neurophysiol. 61: 194-201, 1989.
17. Faulkner, J. A., S. V. Brooks, and E. Zerba. Muscle atrophy and weakness with aging: contraction-induced injury as an underlying mechanism. J. Gerontol. A Biol. Sci. Med. Sci. 50A: 124-129, 1995.
18. Frontera, W. R., L. Grimby, and L. Larsson. Firing rate of the lower motoneuron and contractile properties of its muscle fibers after upper motoneuron lesion in man. Muscle Nerve 20: 938-947, 1997.
19. Fuglevand, A. J., D. A. Winter, and A. E. Patla. Models of recruitment and rate coding organization in motor-unit pools. J. Neurophysiol. 70: 2470-2488, 1993.
20. Galganski, M. E., A. J. Fuglevand, and R. M. Enoka. Reduced control of motor output in a human hand muscle of elderly subjects during submaximal contractions. J. Neurophysiol. 69: 2108-2115, 1993.
21. Gandevia, S. C., G. M. Allen, and D. K. McKenzie. Central fatigue: critical issues, quantification and practical implications. In: Fatigue: Neural and Muscular Mechanisms, edited by S. C. Gandevia, R. M. Enoka, A. J. McComas, D. G. Stuart, and C. K. Thomas. New York: Plenum, 1995, p. 281-294.
22. Gardiner, P. F., and D. Kernell. The "fastness" of rat motoneurones: time-course of afterhyperpolarization in relation to axonal conduction velocity and muscle unit contractile speed. Pflügers Arch. 415: 762-766, 1990.
23. Grimby, L., J. Hannerz, and B. Hedman. Contraction time and voluntary discharge properties of individual short toe extensor motor units in man. J Physiol. (Lond.) 289: 191-201, 1979.
24. Grimby, L., J. Hannerz, and B. Hedman. The fatigue and voluntary discharge properties of single motor units in man. J. Physiol. (Lond.) 316: 545-554, 1981.
25. Hicks, A. L., and N. McCartney. Gender differences in isometric contractile properties and fatiguability in elderly human muscle. Can. J. Appl. Physiol. 21: 441-454, 1996.
26. Howard, J. E., K. C. McGill, and L. J. Dorfman. Age effects on properties of motor unit action potentials: ADEMG analysis. Ann. Neurol. 24: 207-213, 1988.
27. Kadhiresan, V. A., C. A. Hassett, and J. A. Faulkner. Properties of single motor units in medial gastrocnemius muscles of adult and old rats. J. Physiol. (Lond.) 493: 543-552, 1996.
28. Kamen, G., S. V. Sison, C. C. Duke Du, and C. Patten. Motor unit discharge behavior in older adults during maximal-effort contractions. J. Appl. Physiol. 79: 1908-1913, 1995.
29. Lexell, J., C. C. Taylor, and M. Sjöström. 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. J. Neurol. Sci. 84: 275-294, 1988.
30. Macefield, V. G., A. J. Fuglevand, and B. Bigland-Ritchie. Contractile properties of single motor units in human toe extensors assessed by intraneural motor axon stimulation. J. Neurophysiol. 75: 2509-2519, 1996.
31. Marsh, E., D. Sale, A. J. McComas, and J. Quinlan. Influence of joint position on ankle dorsiflexion in humans. J. Appl. Physiol. 51: 160-167, 1981.
32. Nehlig, A., and G. Debry. Caffeine and sports activity: a review. Int. J. Sports Med. 15: 215-223, 1994.
33. Nelson, R. M., G. L. Soderberg, and N. L. Urbscheit. Alteration of motor-unit discharge characteristics in aged humans. Phys. Ther. 64: 29-34, 1984.
34. Newton, J. P., R. Yemm, and M. J. N. McDonagh. Study of age changes in the motor units of the first dorsal interosseous muscle in man. Gerontology 34: 115-119, 1988.
35. Petrosenko, R. D., A. A. Vandervoort, B. M. Chesworth, M. M. Porter, and G. J. Campbell. Development of a home ankle exerciser. Med. Eng. Phys. 18: 314-319, 1996.
36. Rice, C. L., T. L. Vollmer, and B. Bigland-Ritchie. Neuromuscular responses of patients with multiple sclerosis. Muscle Nerve 15: 1123-1132, 1992.
37. Rich, C., G. O'Brien, and E. Cafarelli. Probabilities associated with counting average motor unit firing rates in active human muscle. Can. J. Appl. Physiol. 23: 87-94, 1998.
38. Roos, M. R., C. L. Rice, and A. A. Vandervoort. Age-related changes in motor unit function. Muscle Nerve 20: 679-690, 1997.
39. Rossini, P. M., M. T. Desiato, and M. D. Caramia. Age-related changes of motor evoked potentials in healthy humans: non-invasive evaluation of central and peripheral motor tracts excitability and conductivity. Brain Res. 593: 14-19, 1992.
40. Seki, K., and M. Narusawa. Firing rate modulation of human motor units in different muscles during isometric contraction with various forces. Brain Res. 719: 1-7, 1996.
41. Soderberg, G. L, S. Duesterhaus Minor, and R. M. Nelson. A comparison of motor unit behavior in young and aged subjects. Age Ageing 20: 8-15, 1991.
42. Stålberg, E., and P. R. W. Fawcett. Macro EMG in healthy subjects of different ages. J. Neurol. Neurosurg. Psychiatry 45: 870-878, 1982.
43. Tomlinson, B. E., and D. Irving. The numbers of limb motor neurons in the human lumbosacral cord throughout life. J. Neurol. Sci. 34: 213-219, 1977.
44. Van Cutsem, M., P. Feiereisen, J. Duchateau, and K. Hainaut. Mechanical properties and behaviour of motor units in the tibialis anterior during voluntary contractions. Can. J. Appl. Physiol. 22: 585-597, 1997.
45. Van Schaik, C. S., A. L. Hicks, and N. McCartney. An evaluation of the length-tension relationship in elderly human ankle dorsiflexors. J. Gerontol. 49: B121-B127, 1994.
46. Vandervoort, A. A., and A. J. McComas. Contractile changes in opposing muscles of the human ankle joint with aging. J. Appl. Physiol. 61: 361-367, 1986.
47. Winegard, K. J., A. L. Hicks, D. G. Sale, and A. A. Vandervoort A 12-year follow-up study of ankle muscle function in older adults. J. Gerontol. 51A: B202-B207, 1996.
48. Wolf, S. L., and J. H. Kim. Morphological analysis of the human tibialis anterior and medial gastrocnemius muscles. Acta Anat. (Basel) 158: 287-295, 1997.