Body Region: Upper Arm

  • April 28, 2026
    The radiocapitellar joint provides both elbow stability (resisting valgus forces alongside the MCL) and the proximal pivot of forearm rotation.…
  • April 28, 2026
    The radial nerve is vulnerable in the spiral groove of the humerus where it is directly applied to the bone…
  • April 28, 2026
    The posterior bundle of the elbow MCL fans out from the medial epicondyle to the olecranon, providing supplementary medial stability…
  • April 28, 2026
    The lateral epicondylar bursa is a small subcutaneous bursa over the lateral elbow. Its inflammation is distinct from lateral epicondylalgia…
  • April 28, 2026
    The common extensor origin is the conjoined attachment of the wrist and finger extensors to the lateral epicondyle. The ECRB…
  • April 28, 2026
    The proximal radioulnar joint is the proximal pivot of forearm rotation, where the radial head rotates within the socket of…
  • April 28, 2026
    The elbow joint combines three articulations in one synovial cavity: the humeroulnar hinge (primary flexion-extension), the radiohumeral ball-and-socket (rotation +…
  • April 28, 2026
    The musculocutaneous nerve supplies all three anterior arm muscles (coracobrachialis, biceps, brachialis) and continues as the lateral cutaneous nerve of…
  • April 28, 2026
    The medial collateral ligament (UCL) of the elbow has three components: the anterior bundle (primary valgus stabiliser — taut throughout…
  • April 28, 2026
    The LUCL is the critical lateral elbow stabiliser, running from the lateral epicondyle to the supinator crest of the ulna.…

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