extensor muscle meaning in English

伸肌
伸展肌

This study analyses the differences in the relative cross - sectional area ( rcsa ) of several cervical extensor muscles , assessed by magnetic resonance imaging ( mri ) , between patients with chronic tension - type headache ( ctth ) and healthy controls
该研究运用mri评价慢性紧张型头痛患者和健康对照者颈部伸肌的横截面积的差异。
Conclusion : the muscle strength of shoulder girdle is weak in amateur sprinters , indicating that it is one of the principal factors affecting the performance . the extensor muscle strength of shoulder joint is more influencing than the flexor muscle strength
应用要点：文章以专业和业余的短跑运动员为观察对象，测试了其肩关节各肌群的力矩，结果发现专业运动员无论是肩关节屈肌群还是伸肌群力矩均大于业余运动员，证实了短跑运动员肩带肌群力量是造成运动员成绩差异的主要原因之一。