这个词是什么意思？
The state of activity or tension of a muscle beyond that related to its physical properties, that is, its active resistance to stretch. In skeletal muscle, tonus is dependent upon efferent innervation. (Stedman, 25th ed)
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D009129 · MeSH 2026。
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