Symmetry of mandibular muscle activity as an index of coordinative strategy.
Symmetry of mandibular muscle activity as an index of coordinative strategy.
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下颌肌肉活动的对称性作为协调策略的指标。
DOI：
10.1044/jshr.3606.1145
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Moore,CA
中科院分区：
文献类型：
--
作者：
Moore,CA
作为对Moore，Smith和Ringel(1988)早期研究的复制和扩展，我们研究了人类双侧下颌肌对的肌电活动，包括咀嚼、下颌的自主摆动和语音产生。通过统计比较所有可能的肌肉对之间的零滞后互相关系数，评估这些成对肌肉(咬肌、翼内侧肌和二腹肌前腹)内和之间活动的同步性。根据解剖学和生物力学特性，将配对比较归类并组合成同源对(例如，右咬肌与左咬肌活动的同步性)、同侧协同(例如，右咬肌与右翼内侧翼内侧)、对侧协同(例如，右咬肌与左翼内侧翼内侧)、同侧拮抗剂(例如，右咬肌与右二腹肌)和对侧拮抗剂(例如，右咬肌与左二腹肌)的比较。对肌肉组内(跨任务)和跨肌肉组(任务内)的共同激活的统计比较表明，对于所研究的三个任务中的每一个，共同激活的组明显不同。将这些肌肉分组到共同激活的组中，总是包括那些最同步活动的同源对。在咀嚼过程中，同源对和同侧增效剂的共激活程度显著高于拮抗组或对侧增效剂。在颌骨的自主摆动中，协同肌肉群主要是同源对；协同作用的程度要小得多，而拮抗肌肉是相互作用的。在语音产生过程中，只有同源对作为高度协同作用组出现，尽管增效剂和拮抗剂对协同作用程度较小。这一发现被解释为下颌肌肉之间协调可塑性的进一步指示，并证明了语音和非语音任务的明显协调策略的巨大差异。对这些差异的根源的猜测集中在每项任务的运动学和力生成要求方面的差异。
Electromyographic activity of bilateral mandibular muscle pairs in humans was studied during several tasks: mastication, voluntary oscillation of the jaw, and speech production, as a replication and extension of an earlier investigation by Moore, Smith, and Ringel (1988). The synchrony of activity within and across these paired muscles (masseter, medial pterygoid, and the anterior belly of the digastric) was evaluated by statistical comparison of zero-lag crosscorrelation coefficients between all possible pairs. Paired comparisons were classified and combined according to anatomical and biomechanical properties into comparisons of homologous pairs (e.g., synchrony of activity in right masseter with left masseter), ipsilateral synergists (e.g., right masseter with right medial pterygoid), contralateral synergists (e.g., right masseter with left medial pterygoid), ipsilateral antagonists (e.g., right masseter with right digastric), and contralateral antagonists (e.g., right masseter with left digastric). Statistical comparison of the coactivation within muscle groups (across tasks) and across these muscle groups (within tasks) revealed significantly different groups of coactivated groups for each of the three tasks studied. The grouping of these muscles into coactivated groups always included homologous pairs among those most synchronously active. During mastication, homologous pairs and ipsilateral synergists were coactivated to a degree significantly greater than either of the antagonistic groups or the contralateral synergists. During voluntary oscillation of the jaw, coactive muscle groups were shown to be primarily the homologous pairs; synergists were coactivated to a significantly lesser degree, and antagonistic muscles were reciprocally active. During speech production, only homologous pairs emerged as a highly coactive group, although synergists and antagonistic pairs were coactive to a lesser degree. This finding was interpreted as a further indication of the coordinative plasticity among mandibular muscles, and as a demonstration of the vast differences in the apparent coordinative strategies for speech and nonspeech tasks. Speculation regarding the root of these differences is focused on the differences in kinematic and force-generating requirements of each task.
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影响因子：
2.4
作者：
F. A. Baragar;J. Osborn
通讯作者：
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影响因子：
56.9
作者：
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通讯作者：
DELCOMYN, F
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影响因子：
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作者：
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DOI：
10.1002/9780470513545.ch7
发表时间：
1987
期刊：
Ciba Foundation symposium
影响因子：
--
作者：
Fetz,EE;Cheney,PD
通讯作者：
Cheney,PD
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影响因子：
2.5
作者：
E. Luschei;G. M. Goodwin
通讯作者：
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