Front View of Shoulder Muscles Small 232×320 Medium 464×640 Large 742×1024 Download TIFF Original 1739×2400 | (1.4 MB) Description Shown are the muscles of the posterior wall of the axilla and the front of the arm (the biceps being divided). Keywords "arm muscles", "shoulder muscles", biceps, Trapezius, triceps Galleries Human Muscular System Source: Cunningham, D.J. Textbook of Anatomy (New York, NY: William Wood and Co., 1903)