脊柱操作对通过反射性小腿肌肉募集测量的中枢神经系统活动的影响
脊柱推拿疗法对激活后增强的影响
研究概览
详细说明
采用随机、对照、单盲交叉研究设计,三个独立变量是脊柱手法治疗 (SMT)、10 秒跖屈最大自主等长收缩 (MVIC) 或紧接在 MVIC 之前的 SMT (SMT + MVIC) . 在胫神经 Hmax/Mmax 刺激方案之前,三个疗程中的每一个疗程的治疗顺序都是随机的。
四个因变量中的每一个都在每次训练结束时的胫神经 H 反射刺激方案中被诱发,包括腓肠肌和比目鱼肌的 Hmax/Mmax 比率 (%) 以及在 Hmax 和最大。 Hmax,最高的 H 反射振幅,是最大可能的反射激活的指示;因此,它是对受试者在给定状态下能够激活的运动神经元数量的估计。 刺激强度的进一步增加导致随后的 M 波达到其最高振幅 Mmax。 Mmax 是复合肌肉动作电位 (CMAP),代表完全的肌肉激活。 具体到当前的调查,Mmax 表示激活腓肠肌/比目鱼肌运动神经元 (MN) 池的总体积。
鉴于 Hmax 是对被招募的 MN 数量的推论,而 Mmax 构成了整个运动神经元池,因此可以用 Hmax/Mmax 比率来估计能够被招募的整个 MN 池的比例。 Hmax/Mmax 比率由在 Hmax 处诱发的 EMG 峰峰值振幅 (mV) 除以前面的 Mmax EMG 峰峰值振幅来确定。 在三个数据收集会话期间交付的 SMT、MVIC 或 SMT+MVIC 的每种治疗形式之后,四个因变量(腓肠肌和比目鱼肌的 Hmax/Mmax 比率以及在 Hmax 和 Mmax 处诱发的峰值抽搐扭矩)中的每一个的差异用双向(治疗×时间点)重复测量方差分析确定不同的天数。 还计算了每个因变量相对于基线的百分比变化,并使用相同类型的方差分析来确定每种治疗的受试者内效应的差异。
研究类型
注册 (实际的)
阶段
- 不适用
联系人和位置
学习地点
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Kentucky
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Lexington、Kentucky、美国、40506
- College of Education, Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, KY
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参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
描述
纳入标准:
- 至少一年的阻力训练经验,目前每周至少完成三节训练课
- 男性需要能够背蹲至少 1.5 倍体重的负荷
- 女性需要能够背蹲 1 x 体重
排除标准:
- 下背部、腹部或腿部的任何疼痛和/或在这些区域进行的手术
学习计划
研究是如何设计的?
设计细节
- 主要用途:基础_科学
- 分配:随机化
- 介入模型:阶乘
- 屏蔽:单身的
武器和干预
参与者组/臂 |
干预/治疗 |
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ACTIVE_COMPARATOR:脊柱手法 SM
在重复测量、交叉设计中,所有受试者在三个单独的疗程中接受三种随机治疗之一:SM; 10 秒的跖屈最大自主等长收缩 (MVIC) 或紧接在收缩之前的操作 (SM+MVIC)。
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针对下腰椎和骶髂关节的手动、侧姿、高速低振幅脊柱操作
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ACTIVE_COMPARATOR:最大自主等长收缩 MVIC
在重复测量、交叉设计中,所有受试者在三个单独的疗程中接受三种随机治疗之一:SM; 10 秒的跖屈最大自主等长收缩 (MVIC) 或紧接在收缩之前的操作 (SM+MVIC)。
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10 秒跖屈最大自主等长收缩
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ACTIVE_COMPARATOR:单片机+MVIC
在重复测量、交叉设计中,所有受试者在三个单独的疗程中接受三种随机治疗之一:SM; 10 秒的跖屈最大自主等长收缩 (MVIC) 或紧接在收缩之前的操作 (SM+MVIC)。
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在最大自主等长收缩之前立即进行脊柱操作
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研究衡量的是什么?
主要结果指标
结果测量 |
措施说明 |
大体时间 |
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与基线相比腓肠肌和比目鱼肌 H 反射幅度的变化
大体时间:在治疗后 20 分钟胫神经电刺激方案的 17 个时间点收集数据:20 秒、40 秒、1:00、2:00、3:00、4:00、5:00、6:00 , 7:00, 8:00, 9:00, 10:00, 12:00, 14:00, 16:00, 18:00 和 20:00 分钟
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在三种单独治疗之前和之后立即记录腓肠肌和比目鱼肌 Hmax 处的峰峰值 EMG 振幅 (mV)
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在治疗后 20 分钟胫神经电刺激方案的 17 个时间点收集数据:20 秒、40 秒、1:00、2:00、3:00、4:00、5:00、6:00 , 7:00, 8:00, 9:00, 10:00, 12:00, 14:00, 16:00, 18:00 和 20:00 分钟
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与基线相比,腓肠肌和比目鱼肌等长收缩力矩的变化
大体时间:在 20 分钟胫神经电刺激方案后处理期间的 17 个时间点收集数据:10 秒、30 秒、50 秒、1:30、2:30、3:30、4:30、5:30、 6:30、7:30、8:30、9:30、11:00、13:00、15:00、17:00和19:00分钟
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在三个单独的治疗之前和之后立即记录腓肠肌和比目鱼肌在 Mmax 时的抽搐扭矩 (Nm)
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在 20 分钟胫神经电刺激方案后处理期间的 17 个时间点收集数据:10 秒、30 秒、50 秒、1:30、2:30、3:30、4:30、5:30、 6:30、7:30、8:30、9:30、11:00、13:00、15:00、17:00和19:00分钟
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合作者和调查者
调查人员
- 首席研究员:Grant D Sanders, D.C., Ph.D.、College of Education, Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, KY
- 学习椅:James W Yates, Ph.D.、College of Education, Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, KY
出版物和有用的链接
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研究记录日期
研究主要日期
学习开始
初级完成 (实际的)
研究完成 (实际的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (估计)
研究记录更新
最后更新发布 (实际的)
上次提交的符合 QC 标准的更新
最后验证
更多信息
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