著者
吉村 英哉 望月 智之 宗田 大 菅谷 啓之 前田 和彦 秋田 恵一 松木 圭介 中川 照彦
出版者
日本肩関節学会
雑誌
肩関節 (ISSN:09104461)
巻号頁・発行日
vol.31, no.2, pp.217-219, 2007 (Released:2008-01-30)
参考文献数
10

Previous studies reported a presumably unusual bony attachment of the pectoralis minor muscle. However, less attention has been given to the insertion of the continuation to the glenohumeral joint. The purpose of this study was to evaluate the frequency of this abnormal insertion of the pectoralis minor muscle, and also to investigate the relation between this continuation and the capsule. 81 anatomic specimen shoulders from 41 cadavers were dissected. The insertion of the pectoralis minor tendon to the glenohumeral joint was carefully investigated. The pectoralis minor tendon ran beyond the coracoid process and extended to the superior portion of the glenohumeral joint in 28 out of 81 specimens (34.6%). The continuing insertion divided the coracoacrominal ligaments into two limbs. The continuation was more variable, and consisted of the whole tendon in 6, the middle part in 5, the lateral part in 15, and the medial part in 2 specimens. Furthermore, the pectoralis minor tendon inserted to the posterosuperior border of the glenoid in 6, to the greater tuberosity in 7, and both to the glenoid and the greater tuberosity in 15 specimens. The prevalence of the anomalous insertion of the pectoralis minor tendon revealed to be as high as 34.6% in the present study. This may suggest that the pectoralis minor tendon plays an important role in the stability of the glenohumeral joint.
著者
伊奈 沙織 二村 昭元 若林 良明 中川 照彦 宗田 大
出版者
日本肩関節学会
雑誌
肩関節 (ISSN:09104461)
巻号頁・発行日
vol.36, no.3, pp.1099-1102, 2012 (Released:2012-10-25)
参考文献数
10

We experienced an extremely rare case of thoracic outlet syndrome (TOS) caused by fatigue fracture of the first rib. Case: A 25-year-old male, semi-professional volleyball player, he complained of numbness and weakness of the left upper extremity. Eden-Test, Morley-Test, and Wright-Test were positive on the left. X-ray showed bilateral first rib fractures (non-union on the left side), which was likely caused by heavy muscle training. 3D-CT suggested that the dynamic movement of the pseudoarthrosis following the fatigue fracture was developing incomplete brachial plexus palsy.We performed a surgical decompression by supraclavicular approach without clavicle osteotomy. Compression of the brachial plexus by the dynamic movement of the non-union site was observed. We resected the rib apporoximately 3cm in total.His symptoms had resolved completely after the operation, and he has no problems in playing volleyball.Only a few cases of TOS due to the first rib fracture that has been treated surgically, have been reported. It usually involves the lower trunk of brachial plexus, as we presented. Roos approach and supraclavicular approach are known for TOS operation. Clavicle osteotomy is usually required in the latter approach; however, the procedure seemed invasive for top athletes. Therefore, we chose a supraclavicular approach without clavicle osteotomy in this case. Through this approach, we could obtain a sufficient surgical field to decompress the brachial plexus. In conclusion, we experienced a rare case of TOS caused by non-union after fatigue fracture of the first rib in a volleyball player. Surgical treatment led to complete resolution of the symptoms.
著者
吉村 英哉 望月 智之 宗田 大 菅谷 啓之 前田 和彦 秋田 恵一 松木 圭介 中川 照彦
出版者
日本肩関節学会
雑誌
肩関節 (ISSN:09104461)
巻号頁・発行日
vol.31, no.2, pp.217-219, 2007

Previous studies reported a presumably unusual bony attachment of the pectoralis minor muscle. However, less attention has been given to the insertion of the continuation to the glenohumeral joint. The purpose of this study was to evaluate the frequency of this abnormal insertion of the pectoralis minor muscle, and also to investigate the relation between this continuation and the capsule. 81 anatomic specimen shoulders from 41 cadavers were dissected. The insertion of the pectoralis minor tendon to the glenohumeral joint was carefully investigated. The pectoralis minor tendon ran beyond the coracoid process and extended to the superior portion of the glenohumeral joint in 28 out of 81 specimens (34.6%). The continuing insertion divided the coracoacrominal ligaments into two limbs. The continuation was more variable, and consisted of the whole tendon in 6, the middle part in 5, the lateral part in 15, and the medial part in 2 specimens. Furthermore, the pectoralis minor tendon inserted to the posterosuperior border of the glenoid in 6, to the greater tuberosity in 7, and both to the glenoid and the greater tuberosity in 15 specimens. The prevalence of the anomalous insertion of the pectoralis minor tendon revealed to be as high as 34.6% in the present study. This may suggest that the pectoralis minor tendon plays an important role in the stability of the glenohumeral joint.
著者
望月 智之 関矢 一郎 二村 昭元 宗田 大
出版者
東京医科歯科大学
雑誌
基盤研究(C)
巻号頁・発行日
2015-04-01

肩腱板断裂の修復部に関節のふくろを裏打ちする組織から採取した細胞を投与することにより、治癒を早めることができるかの研究を行った。ラットを使用し、まず膝と肩のどちらから採取した細胞を比較し、膝からの細胞のほうがすぐれていることを証明した。ラットの両肩に腱板断裂を作成し、片側には膝からの細胞を投与した後に修復を行い、反対側の肩関節は何も投与せず修復のみを行った。修復後2週、4週、8週の時点で修復部位の評価を行うと、細胞を移植したほうがしっかりとした構造をつくっていた。また修復した部位を引っ張ってみると、修復後2週の時点では細胞を移植した方が強く固着されていた。
著者
望月 智之 秋田 恵一 宗田 大 関矢 一郎
出版者
東京医科歯科大学
雑誌
若手研究(スタートアップ)
巻号頁・発行日
2007

1. 腱板停止部(上腕骨大結節)において、棘上筋が停止していると考えられていた部位に棘下筋が停止していることを明らかにした。2. 腱板断裂には棘上筋が最も含まれていると考えられてきたが、棘下筋が断裂に最も関与している可能性が高いことを示唆した。3. 上記の結果を踏まえて、腱板断裂をより解剖学的に修復する手術方法を発表した。