The Third Head of the Biceps Brachii Muscle Originated from the Pectoralis Major Muscle

Abstract

During an educational dissection, the supernumerary head of the biceps brachii muscle was found on the left side in a Korean cadaver. The short and long heads were normal: however, the third head originated from the pectoralis major muscle and was inserted into the conjoined tendon of the biceps brachii muscle. The author describes this previously unreported case in Korea and discusses the clinical implications of such a variant.