지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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The purpose of this study was to compare premotor time(PMT) and electro-mechanical delay(EMD)between sitting and standing posture. Twenty four healthy young subjects(12 women and 12 men) participated in this study. Subjects were instructed to perform maximal, voluntary, isometric contraction of ankle muscle(tibialis anterior and gastrocnemius muscles) in reaction to auditory stimulus. PMT and EMD, calculated from stimulus, EMG and torque profile were compared between sitting and standing postures. As statistical analysis, paired t-test was performed to assess difference between sitting and standing posture. In both tibialis anterior and gastrocnemius muscles,EMD was found to be significantly longer for standing than sitting. However, PMT in standing posture was longer than that in sitting posture only in gastrocnemius muscles. These result indicate that increased reaction time, particularly,increased EMD of ankle muscles in standing posture may be caused by co-contraction of ankle muscles for postural control in standing posture.
목차
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참고문헌 (17)
참고문헌 신청
A. Ishida / 1996 / Measurement of visco-elastic properties of muscles around the ankle during standing / Front. Med. Biol. Eng. 7 (1) : 35 ~ 43
B.L. Roberts / 1990 / Effects of walking on reaction and movement times among elders / Percept Mot Skills 71 (1) : 131 ~ 140
D.G. Thelen / 1996 / Effects of age on rapid ankle torque development / J Gerontol A Biol Sci Med Sci 51 (5) : 226 ~ 232
D.P. LaRoche / 2010 / Rapid torque development in older female fallers and nonfallers:a comparison across lower-extremity muscles / J.Electromyogr. Kinesiol 20 (3) : 482 ~ 48
D.P. Laroche / 2007 / Explosive force and fractionated reaction time in elderly low- and high-active women / Med. Sci. Sports Exerc 39 (9) : 1659 ~ 1665
B.L. Roberts / 1990 / Effects of walking on reaction and movement times among elders / Percept Mot Skills 71 (1) : 131 ~ 140
D.G. Thelen / 1996 / Effects of age on rapid ankle torque development / J Gerontol A Biol Sci Med Sci 51 (5) : 226 ~ 232
D.P. LaRoche / 2010 / Rapid torque development in older female fallers and nonfallers:a comparison across lower-extremity muscles / J.Electromyogr. Kinesiol 20 (3) : 482 ~ 48
D.P. Laroche / 2007 / Explosive force and fractionated reaction time in elderly low- and high-active women / Med. Sci. Sports Exerc 39 (9) : 1659 ~ 1665
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