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 該研究運用mri評價慢性緊張型頭痛患者和健康對照者頸部伸肌的橫截面積的差異。
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 應用要點:文章以專業和業余的短跑運動員為觀察對象,測試了其肩關節各肌群的力矩,結果發現專業運動員無論是肩關節屈肌群還是伸肌群力矩均大于業余運動員,證實了短跑運動員肩帶肌群力量是造成運動員成績差異的主要原因之一。