Comparing human skeletal muscle architectural parameters of cadavers with in vivo ultrasonographic measurements
Comparing human skeletal muscle architectural parameters of cadavers with in vivo ultrasonographic measurements
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DOI：
10.1046/j.1469-7580.2001.19940429.x
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发表时间：
2001-10-01
影响因子：
2.4
通讯作者：
McKee, NH
中科院分区：
文献类型：
--
作者：
Martin, DC;Medri, MK;McKee, NH
本研究的目的是记录和比较尸体标本和活体人体骨骼肌的结构参数（纤维束长度、笔划角度）。对5具尸体（平均年龄72.6岁，范围65-83岁）和9名活体（平均年龄76.3岁，范围70-92岁）的内侧（MG）和外侧（LG）腓肠肌，以及后（PS）和前（AS）比目鱼肌进行了双侧检查。数据是从尸体标本的直接测量和活体受试者的超声扫描中获得的。在尸体肌肉中，纤维束分离；它们的长度以毫米为单位测量，笔角以度为单位记录。在活肌肉中，从放松和收缩肌肉的超声扫描中采取了类似的测量。对于松弛肌肉的扫描，受试者俯卧，足部与腿部成90度角，对于收缩肌肉的扫描，受试者被要求在扫描过程中保持足底完全屈曲。比较两组配对部位的纤维束长度和笔触角度。研究发现，不同肌肉部位的纤维长度和刺入角在尸体和体内值之间的关系是不同的。尸体的建筑参数不倾向于始终如一地朝向松弛或收缩的极端。相反，在MG、PS和AS中，尸体纤维束的长度介于松弛和收缩的体内肌肉之间。同样，尸纤维的前后角位于LG和PS的体内值之间。总之，尸肌肉的结构特征不同于松弛和收缩的体内肌肉。因此，在基于尸体研究建立骨骼肌模型时，应考虑活体组织和尸体组织在结构上的差异。
The purpose of this study was to document and compare the architectural parameters (fibre bundle length, angle of pennation) of human skeletal muscle in cadaveric specimens and live subjects. The medial (MG) and lateral (LG) gastrocnemius, and posterior (PS) and anterior (AS) soleus were examined bilaterally in 5 cadavers (mean age 72.6, range 65-83 y) and 9 live subjects (mean age 76.3, range 70-92 y). Data were obtained from direct measurement of cadaveric specimens and from ultrasonographic scans of the live subjects. In cadaveric muscle, fibre bundles were isolated; their length was measured in millimetres and pennation angles were recorded in degrees. In live muscle, similar measurements were taken from ultrasonographic scans of relaxed and contracted muscle. For the scans of relaxed muscle, subjects were positioned prone with the foot at a 90 degrees angle to the leg, and for scans of contracted muscle, subjects were asked to sustain full plantarflexion during the scanning process. Fibre bundle length and angle of pennation were compared at matched locations in both groups. It was found that the relationship between cadaveric and in vivo values for fibre length and angle of pennation varied between muscle parts. The cadaveric architectural parameters did not tend to lie consistently towards either extreme of relaxation or contraction. Rather, within MG, PS and AS, cadaveric fibre bundle lengths lay between those for relaxed and contracted in vivo muscle. Similarly both the anterior and posterior cadaveric fibre angles of pennation lay between the in vivo values within LG and PS. In summary, architectural characteristics of cadaveric muscle differ from both relaxed and contracted in vivo muscle. Therefore, when developing models of skeletal muscle based on cadaveric studies, the architectural differences between live and cadaveric tissue should be taken into consideration.