Neuromuscular performance of paretic versus non-paretic plantar flexors after stroke.
Neuromuscular performance of paretic versus non-paretic plantar flexors after stroke.
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DOI：
10.1007/s00421-011-1934-z
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发表时间：
2011-12
影响因子：
3
通讯作者：
Hoff, Jan
中科院分区：
文献类型：
--
作者：
Fimland, Marius Steiro;Moen, Per Marius R.;Hill, Tessa;Gjellesvik, Tor Ivar;Torhaug, Tom;Helgerud, Jan;Hoff, Jan
本研究的目的是比较慢性中风患者的麻痹和非麻痹跖屈肌（即比目鱼肌、腓肠肌内侧肌、外侧肌）的神经肌肉功能。据推测，在跖屈肌最大自主等长收缩期间，通过肌电图（EMG）和归一化为 M 波的 V 波评估的力发展（RFD）和神经激活的收缩率以及自主激活（抽搐插值）将减少，并且在瘫痪肢体中诱发的肌肉抽搐特性将减少。十名慢性中风幸存者完成了这项研究。主要发现是，与非麻痹腿相比，瘫痪侧在以下方面表现出功能恶化：(1) 从力开始到 250 毫秒的所有分析时间窗口中的 RFD，尽管相对 RFD（即归一化为最大自愿力）相似； (2) 快速神经激活（对于大多数分析的时间窗口），通过从 EMG 开始到 250 ms 的时间窗口内的 EMG 活动进行评估； (3) V波反应（腓肠肌内侧肌除外）； (4) 自愿激活； (5) 诱发的峰值抽搐力，尽管没有内在肌肉减慢的证据； (6) 在最大随意力下获得的肌电图活动。总之，这项研究表明慢性中风幸存者的足底屈肌存在相当大的神经肌肉不对称性。应研究有效的康复制度。
The objective of this study was to compare the neuromuscular function of the paretic and non-paretic plantar flexors (i.e. soleus, gastrocnemius medialis, lateralis) in chronic stroke patients. It was hypothesized that the contractile rate of force development (RFD) and neural activation, assessed by electromyogram (EMG) and V-waves normalized to the M-wave, and voluntary activation (twitch interpolation) would be reduced during plantar flexor maximum voluntary isometric contraction and that the evoked muscle twitch properties would be reduced in the paretic limb. Ten chronic stroke survivors completed the study. The main findings were that the paretic side showed deteriorated function compared to the non-paretic leg in terms of (1) RFD in all analyzed time windows from force onset to 250 ms, although relative RFD (i.e. normalized to maximum voluntary force) was similar; (2) fast neural activation (for most analyzed time windows), assessed by EMG activity in time windows from EMG onset to 250 ms; (3) V-wave responses (except for gastrocnemius medialis); (4) voluntary activation; (5) the evoked peak twitch force, although there was no evidence of intrinsic muscle slowing; (6) EMG activity obtained at maximal voluntary force. In conclusion, this study demonstrates considerable neuromuscular asymmetry of the plantar flexors in chronic stroke survivors. Effective rehabilitation regimes should be investigated.
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影响因子：
2.5
作者：
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通讯作者：
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DOI：
10.1016/0003-9993(91)90006-5
发表时间：
1991-10-01
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DOI：
10.1111/j.1600-0838.2007.00732.x
发表时间：
2008-12-01
影响因子：
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作者：
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