Lee S T
Department of Plastic Surgery, Singapore General Hospital.
Ann Acad Med Singap. 1988 Jul;17(3):328-34.
This is a detailed histological study of the philtrum of the upper lip. The aims of the study are to explain the unique configuration of the philtrum and to offer a new definition to it. The materials for the study are taken from human foetuses, operative specimens and cadavers. The upper lip is sectioned transversely and stained to show muscle, connective tissue and elastic fibres. The histological results show that there is no specific condensation of connective tissue in the midline to account for the central philtral groove. The significant histological finding is the pattern of insertion of the orbicularis oris muscle into the skin of the philtral area. The muscle fibres decussate in the midline and vertical as well as oblique muscle fibre extensions insert into the dermis in the region of the midline philtral groove and the philtral ridges. A dynamic role is postulated of the role of orbicularis oris muscle in giving rise to the unique configuration of the philtrum. It is redefined in the light of our present knowledge of the histological basis of the philtral morphology.
这是一项对上唇人中的详细组织学研究。该研究的目的是解释人中的独特形态，并给出一个新的定义。研究材料取自人类胎儿、手术标本和尸体。上唇进行横向切片并染色，以显示肌肉、结缔组织和弹性纤维。组织学结果表明，中线处没有特定的结缔组织凝聚来解释中央人中沟。重要的组织学发现是口轮匝肌插入人中区域皮肤的模式。肌纤维在中线交叉，垂直和斜向的肌纤维延伸插入中线人中沟和人中嵴区域的真皮。推测口轮匝肌在形成人中独特形态中起动态作用。根据我们目前对人中形态学组织学基础的认识，对其进行了重新定义。
