眼轮匝肌外侧降肌的形态学及其在眶周年轻化手术中的临床意义

Depressor orbicularis lateralis: concept, anatomy and clinical relevance

眼轮匝肌外侧降肌的概念,来自于对眉下垂矫正手术的临床探索和解剖学研究。这一独特的解剖结构竖直走行于眼轮匝肌外侧部,在收缩时向下牵拉外侧眉,形成眉下垂。同时,此肌肉还参与鱼尾纹的形成,导致眶周老化改变。在眶周年轻化手术,尤其是眉上提术和鱼尾纹除皱术中,对这一结构进行术前辨识,术中解剖探查,并适当地剥离、切断、固定,将有利于降低术后眉下垂的复发几率。该文对眼轮匝肌外侧降肌的解剖基础和功能、在眉下垂和鱼尾纹发生机制中的作用,以及其在眶周年轻化手术中的临床意义进行了综述。

The concept of depressor orbicularis lateralis arises through anatomy of brow ptosis and innovations of its correction. This vertical muscle band is usually found running inferiorly from the lateral brow down along the lateral orbital rim, adjacent to the orbicularis oculi. The muscle segment is a powerful depressor of the brow and may lead to recurrent lateral eyebrow ptosis, if it is not addressed at the time of the facelift. In this review, the anatomical evidence, basic functions of depressor orbicularis lateralis, as well as its clinical relevance and the proper measures in handling this structure as part of brow ptosis and crow′s feet surgery will be discussed.