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Intramuscular Neural Distribution of Rhomboid Muscles: Evaluation for Botulinum Toxin Injection Using Modified Sihler's Method

 Kyu-Ho Yi  ;  Hyung-Jin Lee  ;  You-Jin Choi  ;  Ji-Hyun Lee  ;  Kyung-Seok Hu  ;  Hee-Jin Kim 
 TOXINS, Vol.12(5) : 289, 2020-05 
Journal Title
Issue Date
botulinum toxin ; clinical guideline ; injection ; rhomboid muscle ; spasticity
This study describes the nerve entry point and intramuscular nerve branching of the rhomboid major and minor, providing essential information for improved performance of botulinum toxin injections and electromyography. A modified Sihler method was performed on the rhomboid major and minor muscles (10 specimens each). The nerve entry point and intramuscular arborization areas were identified in terms of the spinous processes and medial and lateral angles of the scapula. The nerve entry point for both the rhomboid major and minor was found in the middle muscular area between levels C7 and T1. The intramuscular neural distribution for the rhomboid minor had the largest arborization patterns in the medial and lateral sections between levels C7 and T1. The rhomboid major muscle had the largest arborization area in the middle section between levels T1 and T5. In conclusion, botulinum neurotoxin injection and electromyography should be administered in the medial and lateral sections of C7-T1 for the rhomboid minor and the middle section of T1-T7 for the rhomboid major. Injections in the middle section of C7-T1 should also be avoided to prevent mechanical injury to the nerve trunk. Clinicians can administer safe and effective treatments with botulinum toxin injections and other types of injections by following the methods in our study.
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2. College of Dentistry (치과대학) > Dept. of Oral Biology (구강생물학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Others (기타) > 1. Journal Papers
Yonsei Authors
Kim, Hee Jin(김희진) ORCID logo https://orcid.org/0000-0002-1139-6261
Lee, Ji-Hyun(이지현) ORCID logo https://orcid.org/0000-0003-3732-2698
Lee, Hyung Jin(이형진) ORCID logo https://orcid.org/0000-0002-3082-935X
Choi, You Jin(최유진) ORCID logo https://orcid.org/0000-0003-3701-2200
Hu, Kyung Seok(허경석) ORCID logo https://orcid.org/0000-0002-9048-3805
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