Body Region: Upper Arm

  • April 28, 2026
    Three articulations in one capsule: ulnohumeral hinge (flex/extend), radiohumeral (forearm rotation), and proximal radioulnar joint. Medial and lateral collateral complexes…
  • April 28, 2026
    The musculocutaneous nerve supplies the three muscles of the anterior upper arm and continues as the lateral cutaneous nerve of…
  • April 28, 2026
    The intercostobrachial nerve is the lateral cutaneous branch of the second intercostal nerve that crosses the axilla to supply the…
  • April 28, 2026
    The largest brachial plexus branch (C5–T1), winding the humeral spiral groove before dividing into superficial sensory and deep posterior interosseous…
  • April 28, 2026
    The ulnar collateral ligament of the elbow has three bundles with the anterior bundle being the primary stabiliser against the…
  • April 28, 2026
    The lateral collateral ligament complex of the elbow includes the radial collateral ligament, the lateral ulnar collateral ligament, and the…
  • April 28, 2026
    The annular ligament encircles the radial head like a collar, binding it to the ulna without restricting rotation, and forms…
  • April 28, 2026
    The capitellum is the spherical lateral articular surface of the distal humerus that articulates with the radial head, forming the…
  • April 28, 2026
    The trochlea is the spool-shaped medial articular surface of the distal humerus that articulates with the trochlear notch of the…
  • April 28, 2026
    The medial epicondyle is the medial prominence of the distal humerus serving as the origin for the common flexor tendon…

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