![]() ![]() However, more detailed study is needed to understand the topographic characteristics and anatomical variations of the SC muscle. Moreover, some fibers of the SC muscle are directly attached to the velum, and thus, might assist in retraction thereof. Previous studies have considered the functions of the SC muscle from the perspective of its anatomical morphology: it is attached to the buccinator muscle, which enables a smooth transition from the lingual stage to the pharyngeal stage during ingestion. ![]() Their interaction can only be elucidated by observing their topographic relationship on both the inner and outer surfaces of the pharynx. However, the two muscles do not work independently. It is well known that the STP is critically involved in shortening the pharynx and elevating the larynx while the SC muscle plays a critical role as a sphincter muscle. Thus, there is a particularly close relationship between the STP and the SC muscle. As an exception, the STP arises from the outside of the pharynx (i.e., the styloid process) and penetrates the posterior wall (i.e., the pharyngeal constrictor muscles) into the pharynx. Īlmost all muscles of the pharynx originate and insert into the internal surface of the pharynx. Therefore, a complete understanding of the pharyngeal function requires a detailed knowledge on the morphology of each muscle and relationships between them. These muscles are not simple structures and do not work individually they move and function together in sync. It is well known that three external circular muscles (superior constrictor, middle constrictor, inferior constrictor ) act as the sphincter, and three internal longitudinal muscles (the stylopharyngeus, palatopharyngeus, and salpingopharyngeus) elevate the pharynx. The pharynx, a tube-like structure, is a part of the digestive system and is composed of six muscles. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |