💪 Coracobrachialis

Brian Lee
Aug 27, 2025
Review Pending
Table of Contents

Summary

Origins
📍 Coracoid process of the scapula
Insertions
Medial surface of mid-humeral shaft
Actions
Flexes the shoulder
Adducts the shoulder

Illustrations

Richer, Coracobrachialis

Arm Elevation

🤖 AI Generated

When you raise your arm (especially in shoulder flexion or abduction), the coracobrachialis becomes more superficial because:

  1. The deltoid moves upward, reducing its coverage.
  2. The pectoralis major stretches, making underlying structures more apparent.
  3. The coracobrachialis is tensed, especially if there is resistance to the movement (e.g., holding an object or flexing the shoulder against resistance).

Examples

Pavel Tchistiakov, 1856, Coracobrachilis Example

Pavel Tchistiakov, 1856, Coracobrachilis Example

References