Body Region: Upper Arm

  • April 28, 2026
    The annular ligament wraps around the radial head, holding it against the ulnar radial notch during forearm rotation. It is…
  • April 28, 2026
    The anconeus is a small triangular muscle at the posterolateral elbow that assists elbow extension and provides lateral elbow stability.…
  • April 28, 2026
    The triceps tendon is the single converging tendon of all three triceps heads, inserting on the olecranon posterior surface. It…
  • April 28, 2026
    The medial collateral ligament of the elbow (UCL) consists of three bundles: the anterior band (strongest, primary valgus stabiliser at…
  • April 28, 2026
    The lateral collateral ligament complex of the elbow consists of the radial collateral ligament (to the annular ligament), the lateral…
  • April 28, 2026
    The annular ligament forms a fibrocartilaginous ring around the radial head, attached to the ulnar radial notch anteriorly and posteriorly.…
  • April 28, 2026
    The coracobrachialis connects the coracoid process to the mid-humerus, producing shoulder flexion and adduction. The musculocutaneous nerve pierces through the…
  • April 28, 2026
    The medial head of the triceps is the deepest and smallest head, arising from the posterior humeral surface below the…
  • April 28, 2026
    The articularis cubiti is a small inconstant muscle deep to the medial head of the triceps that retracts the posterior…
  • April 28, 2026
    The profunda brachii (deep brachial artery) is the largest branch of the brachial artery, accompanying the radial nerve in the…

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