古果属茎枝细弱、叶子细而深裂、叶柄基部多膨突等特征，反映了该属的水生草本特征。
The delicate stems, thin and highly dissected leaves and swollen bases of the leaf stalks imply Archaefructus as aquatic and herbaceous angiosperms in nature.
他们建议，如果术者希望将上位相邻节段的多裂肌束去神经化降至最低，应利用经皮技术在头侧节段置入椎弓根螺钉。
They recommended that pedicle screw insertion at the cephalad level be performed percutaneously if one desires to minimize denervation of the multifidus complex at the cephalad adjacent level.
结论：上述数据解决了腰椎损伤后多裂肌横断面积是否迅速减少的疑问。
Conclusions. These data resole the controersy that the multifidus cross-sectional area reduces rapidly after lumbar injury.
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