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在解剖显微镜下,对34例胎儿及2例成人尸体的膈肌标本,进行了观察。膈肌中心腱三叶均为3层构筑,且中心腱的纤维束大都呈人字形分劈,形成2个方向不同的腱膜纤维层。中心腱的前叶纤维,大部分越过正中线,与对边和侧叶的深、浅层腱纤维相延续,整个膈肌在前后、左右之间形成了二腹肌样的排列结构。这种构筑提示中心腱不是膈肌周围肌性部分的止点,而是膈肌中间腱膜互相交叉延续的共同区域。本文观察表明,膈肌中心腱纤维束的分劈及其规则排列,在胎儿时期即已形成。这对增加膈的弹性和韧性,有利于膈的呼吸运动,具有重要的功能意义。
Under a dissecting microscope, 34 cases of fetal and 2 adult cadaveric diaphragm specimens were observed. Diaphragm in the center of the tendon three-leaf clover are constructed, and the central tendon fiber bundle mostly herringbone split, the formation of two different directions of the aponeurosis fiber layer. The anterior leaflet fibers of the central tendon most of them crossed the midline and continued with the deep and superficial tendon fibers of the opposite and lateral lobes. The whole diaphragmatic muscle formed a bilaterally arranged structure between the anterior, posterior, and left and right sides. This construction suggests that the central tendon is not the only point around the muscular portion of the diaphragm, but rather the common area where the diaphragm’s middle aponeurosis crosses over. The observation of this paper shows that the splitting of the tendon fiber bundle in the diaphragmatic center and its regular arrangement are formed during the fetal period. This is to increase the elasticity and toughness of the diaphragm, is conducive to the respiratory motion of the diaphragm, has an important functional significance.