Abstract
Electromyographical (EMG) burst onset times for postural muscles were compared in young and elderly male and female subjects performing a forceful abrupt pull with the right arm against a load cell apparatus while standing. EMG activity was collected via surface electrodes from the posterior deltoid, and right and left hamstring and quadriceps muscles. Pulls were performed at varying force levels from 100% to approximately 50% of a maximum effort. Regression equations were developed for each postural muscle for each group, using force production values as the independent variable, and postural muscle onset latencies (relative to deltoid onset) as the dependent variable. Regression slopes for postural muscles of elderly subjects ranged from 0.59 to 0.33, while slopes for the young subjects ranged from 0.72 to 0.63. Less elevated slopes for the elderly may indicate a reduced ability to temporally scale postural muscle onset latencies to variations in the force of the upper- limb task; a reduction in this ability may constitute a possible contributing factor to instability in the elderly. (Aging Clin. Exp. Res. 6: 323–333, 1994)
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References
Horak F.B., Shupert C.L., Mirka A.: Components of postural dyscontrol in the elderly: A review. Neurobiol. Aging 10: 727–738, 1989.
Woodhull-McNeal A.P.: Changes in posture and balance with age. Aging Clin. Exp. Res. 4: 219–225, 1992.
Stelmach G.E., Phillips J., Di Fabio R.P., Teasdale N.: Age, functional postural reflexes, and voluntary sway. J. Gerontol. 44: B100–106, 1989.
Woollacott M.: Gait and postural control in the aging adult. In: Bles W., Brandt T. (Eds.), Disorders of Posture and Gait. Elsevier Publishing, Amsterdam, 1986, pp. 325–336.
Morse J.M., Tylko S.J., Dixon H.A.: Characteristics of the fall prone patient. Gerontology 27: 516–522, 1987.
Belenkii V.Y., Gurfinkel V.S., Paltsev Y.I.: Elements of control of voluntary movements. Biophys. J. 12: 154–161, 1967.
Cordo P.J., Nashner L.M.: Properties of postural adjustments associated with rapid arm movements. J. Neurophys. 47: 287–302, 1982.
Lee W.A.: Anticipatory control of postural and task muscles during rapid arm flexion. J. Motor Behav. 12: 185–196, 1980.
Weeks D.L., Wallace S.A.: Focal movement velocity and premovement posture effects on the anticipatory postural response. Hum. Mov. Sci 11: 717–734, 1992.
Stelmach G.E., Worringham C.J.: Sensorimotor deficits related to postural stability: Implications for falling in the elderly. Clin. Geriatric Med. 1: 679–694, 1985.
Mankovskii N.B., Mints A.Y., Lysenyuk V.P.: Regulation of the preparatory period for complex voluntary movements in old and extreme old age. Hum. Phys. 6: 47–50, 1980.
Inglin B., Woollacott M.: Age-related changes in anticipatory postural adjustments associated with arm movements. J. Gerontol. 43: M105–M113, 1988.
Rogers M.W., Kukulka C.G., Soderberg G.L.: Age-related changes in postural responses preceding rapid self-paced and reaction time arm movements. J. Gerontol. 47: M159–M165, 1992.
Frank J.S., Patla A.E., Brown J.E.: Anticipatory postural adjustments in adults: Aging characteristics. Proceedings of the 1987 Annual Conference of the North American Society for the Psychology of Sport and Physical Activity. Vancouver, British Columbia, Canada, 1987, p. 21.
Riach C.L., Hayes K.C.: Anticipatory postural control in children. J. Motor Behav. 22: 250–266, 1990.
Riach C.L., Lucy S.D., Hayes K.C.: Adjustments to posture prior to arm movement. In: Jonsson B. (Ed.), International series on biomechanics, Biomechanics X-A. Human Kinetics Publishers, Champaign, IL, 1987, pp. 459–463.
Lee W.A., Michaels C.F., Pai Y-C.: The organization of torque and EMG activity during bilateral handle pulls. Exp. Brain Res. 82: 304–314, 1990.
Howell D.C.: Statistical Methods for Psychology, ed. 1. Duxbury Press, Boston, 1982.
Woollacott M.: Changes in postural control and the integration of postural responses into voluntary movements with aging: Is borderline pathology a contributor? In: Brandt T., Bles W., Deitrich M., Krafczykn S., Straube A. (Eds.), Disorders of Posture and Gait. Elsevier Publishers, Amsterdam, 1990, pp. 221–228.
Dick J.P., Rothwell J.C., Berardelli A., Thompson P.D., Gioux M., Benecke R., Day B.L., Marsden C.D.: Associated postural adjustments in Parkinson’s disease. J. Neurol. Neurosurg. Psychol. 49: 1378–1385, 1986.
Paltsev Y.I., Einer A.M.: Preparatory and compensatory period during voluntary movement in patients with involvement of the brain of different localization. Biofizika 12: 161–168, 1967.
Babinski J.: De l’asynergie cerebelleuse. Revolution du Neurologie 7: 806–816, 1899.
Traub M.M., Rothwell J.C., Marsden C.D.: Anticipatory postural reflexes in Parkinson’s disease and other akinetic syndromes and in cerebellar ataxia. Brain 103: 393–412, 1980.
Ivry R.I., Keele S.W.: Timing functions of the cerebellum. Cognitive Neurosci. 1: 136–152, 1989.
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Weeks, D.L. Age-related differences in temporal scaling of postural EMG activity. Aging Clin Exp Res 6, 323–333 (1994). https://doi.org/10.1007/BF03324260
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DOI: https://doi.org/10.1007/BF03324260