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陈 昕,王 盛,黄 犇,朱 奕,庄 任,王 彤.外界干扰对健康人姿势调整时肢体活动影响的表面肌电研究[J].中国康复医学杂志,2018,(3):304~309
外界干扰对健康人姿势调整时肢体活动影响的表面肌电研究    点此下载全文
陈 昕  王 盛  黄 犇  朱 奕  庄 任  王 彤
南京医科大学,210029
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摘要:
      摘要 目的:探究不同条件(方向、速度)的外界干扰对健康人上、下肢在预期性姿势调整(APAs)阶段、代偿性姿势调整(CPAs)阶段的调整活动影响。 方法:使用无线表面肌电采集13例(6例男性,7例女性)健康青年受到活动平板在前后方向、3种不同速度的位移后,分析相关肌肉在预期性姿势调整(APA)、代偿性姿势调整(CPA)阶段时的活动。 结果:①在APA与CPA阶段,胫骨前肌、股二头肌、股四头肌、臀大肌、肱三头肌、肱二头肌、三角肌的平均积分肌电值在前向外部干扰时显著大于后向(P<0.05)。②除不同的速度对三角肌在APA阶段平均积分肌电值没有显著差异之外(P=0.061),干扰速度越快引起的其余6块肌肉平均积分肌肉值显著增大(P<0.05)。③仅在“向前中速”与“向后快速”的2种条件下,肱三头肌、肱二头肌、三角肌的平均积分肌电值在APA阶段有显著差异(P<0.05)。 结论:在姿势调整中,外部干扰的方向与强度对上、下肢相应肌肉在干扰发生前的预活动及发生后的调整活动均有影响,且前向干扰与越快的干扰速度所引起的姿势调整活动更强烈。
关键词:预期性姿势调整  代偿性姿势调整  姿势控制  平衡  外部干扰
Effects of external perturbation on postural adjustments of limbs in healthy individuals :A surface electromyography study    Download Fulltext
Nanjing Medical University, Nanjing, 210029
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Abstract:
      Abstract Objectives:To investigate the adaption of anticipatory postural adjustments (APAs) and compensatory postural adjustments (CPAs) of limbs in healthy individuals to changes in different direction and speed of external perturbation. Method: Wireless surface electromyography (SEMG) data were recorded and analyzed during the time duration typical for APA and CPA when subjects were disturbed by platform movement in posterior and anterior direction and 3 kinds of speed. Result:①In both APA and CPA time duration, integrals of EMG activities of tibialis anterior, biceps femoris, quadriceps femoris, gluteus maximus, triceps brachii, biceps brachii and deltoid muscles showed greater in anterior perturbation than posterior perturbation (P<0.05). ②Significant difference was found in integrals of EMG activities during both APA and CPA time duration in different speed of perturbation (P<0.05), but not in deltoid during APA time duration (P=0.061). ③The results showed significant difference in integrals of EMG activities of triceps brachii, biceps brachii and deltoid muscles only in APA time duration when platform movement was in “anterior medium-speed condition” and “posterior high-speed condition”(P<0.05). Conclusion: Direction and magnitude of external perturbation can influence both anticipatory and feedback muscles activities in upper and lower extremity. Anterior perturbation and higher speed perturbation can cause greater postural adjustments.
Keywords:anticipatory postural adjustments  compensatory postural adjustments  postural control  balance  external perturbation
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