Coracobrachialis Longus Muscle: Humeroepitrochlearis

Area of Science:

• Anatomy
• Human Morphology
• Musculoskeletal System

Background:

• The coracobrachialis muscle is a key component of the upper arm, involved in shoulder and elbow flexion.
• Anatomical variations, though uncommon, can occur in muscle structure and insertion points.
• Understanding these variations is crucial for accurate anatomical knowledge and clinical practice.

Observation:

• A rare anatomical variation of the coracobrachialis longus muscle was identified during a routine dissection of a 68-year-old male cadaver.
• The variant muscle originated from the medial surface of the humerus's middle part.
• It featured a distinct muscular portion and a tendinous portion inserting onto the medial epicondyle of the humerus.

Findings:

• The discovered variation represents an unusual presentation of the coracobrachialis longus muscle's origin and insertion.
• This specific variant, originating from the humerus and inserting at the medial epicondyle, has not been frequently reported in anatomical literature.
• A review of existing literature on coracobrachialis variations was conducted.

Implications:

• This finding contributes to the understanding of human anatomical variability in the upper limb.
• Awareness of such rare muscle variations is important for surgeons and clinicians to prevent misinterpretation during procedures.
• Further research into the prevalence and functional significance of coracobrachialis variations is warranted.