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Anatomical variations of the stylopharyngeus and superior constrictors in relation to their function

Authors
 Da-Yae Choi  ;  Jung-Hee Bae  ;  Kyung-Seok Hu  ;  Hee-Jin Kim 
Citation
 Anatomy and Cell Biology, Vol.53(4) : 417-421, 2020-12 
Journal Title
Anatomy and Cell Biology
ISSN
 2093-3665 
Issue Date
2020-12
Keywords
Anatomy ; Deglutition ; Pharyngeal muscles ; Stylopharyngeus ; Velopharyngeal sphincter
Abstract
The aims of this study were to clarify the topography and variations stylopharyngeus (STP) and superior constrictor (SC) muscles, and to examine what role they play in the pharyngeal movement. Forty-four specimens (22 right and 22 left sides) from embalmed Korean adult cadavers (13 males, 9 females; age range, 46-89 years; mean age, 69.2 years) were used in this study. The accessory bundle of STP and petropharyngeus was found in 18.2% (8/44) and 25.0% (11/44) of cases, respectively. A variation of the STP, in which it ran transversely and merged with the SC muscle, was found in 2.3% (1/44) of cases while a variation of the SC muscle, in which it ran longitudinally and merged with the contralateral constrictors, was found in 11.4% (5/44). The variant muscle bundles play their own role in pharyngeal movement according to their morphology. These results provide information that will help a comprehensive understanding of the effects of pharyngeal muscles on movement.
Files in This Item:
T202006749.pdf Download
DOI
10.5115/acb.20.159
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Oral Biology (구강생물학교실) > 1. Journal Papers
Yonsei Authors
Kim, Hee Jin(김희진) ORCID logo https://orcid.org/0000-0002-1139-6261
Hu, Kyung Seok(허경석) ORCID logo https://orcid.org/0000-0002-9048-3805
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/182728
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