Abstract
UNUSUAL BILATERAL PROXIMAL ATTACHMENTS OF THE PECTORALIS MINOR MUSCLE: A CASE REPORT ON CADAVER DISSECTION

*Gwunireama I. U., Ogoun T. R. and BOB-Manuel I. F.

ABSTRACT

The pectoralis minor muscle is one of the muscles connecting the upper limb to the thoracic wall. It is a triangular muscle lying in deep relation to the pectoralis major. This is a case report on a possible variation in the attachment of the pectoralis minor muscle. During normal routine dissection of a male cadaver, four skin incisions were made on the anterior chest wall and skin reflected to expose the pectoral muscles. The pectoralis major muscle was cut and reflected to expose the pectoralis minor muscle. The pectoralis minor muscle thus exposed, showed a variant proximal attachment on the 6th rib on both sides in addition to the outer surfaces of the 3rd, 4th and 5th ribs near their costal cartilages. The distal attachment was on the coracoid process of the scapula. This report has established a variation in the attachment of the proximal part of the pectoralis minor muscle. This information will be of immense benefit to the anatomists and clinicians during the examination of the anterior chest wall.

Keywords: Variant anatomy, Pectoralis minor and Cadaver.


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