Elbow Joint: Ligaments, Movements & Injuries | Clinical Anatomy

Video Description

Content: 00:00 Introduction & Content 00:34 Joints within the elbow joint 00:58 Proximal Humerus 01:51 Humeroulnar joint 02:11 Proximal Radioulnar Joint 02:43 Humeroradial Joint 03:13 Synovial Membrane 03:54 Ligaments of the Elbow Joint 04:03 Ulnar Collateral Ligament 04:26 Radial Collateral Ligament 04:54 Annular Ligament of Radius 05:37 Quadrate Ligament 05:52 Fibrous Capsule & Sacciform Recess 06:32 Bursae of the Elbow Joint 06:47 Subcutaneous Olecranon Bursa 07:23 Next Topic ------------------ 🫀Help me make more free educational content: youtube.com/channel/UCEr7pkSXVsHcBLLBcJAGV-Q/join 📲Other Links: Website: https://taimtalksmed.com/ Instagram: https://www.instagram.com/taimtalksmed/ Discord: https://discord.com/invite/DENMUpS8ey ------------------- Elbow Joint (Ligaments, Movements & Common Injuries) | Anatomy This video covers the anatomy of the elbow joint. We look visually at the three joints that make up the elbow, including their articulating surfaces, ligaments, synovial membrane, capsule, and bursae. Bones Involved in the Elbow Joint: • Humerus (humerus) • Radius (radius) – lateral bone of the forearm (thumb side) • Ulna (ulna) – medial bone of the forearm (pinky side) Joints within the Elbow Joint: Humeroulnar joint (articulatio humeroulnaris)  • Classic hinge joint  • Trochlea of humerus (trochlea humeri) + Trochlear notch of ulna (incisura trochlearis ulnae)  • Allows flexion and extension Proximal radioulnar joint (articulatio radioulnaris proximalis)  • Pivot joint  • Articular circumference of radius (circumferentia articularis radii) + Radial notch of ulna (incisura radialis ulnae)  • Enables pronation and supination Humeroradial joint (articulatio humeroradialis)  • Ball-and-socket joint (functionally part of hinge system)  • Capitulum of humerus (capitulum humeri) + Articular facet of radius (fovea articularis radii) Synovial Features & Capsule: • Synovial membrane (membrana synovialis) – surrounds all 3 joints in a single cavity • Fibrous capsule (capsula fibrosa) – encloses and stabilizes the joint • Sacciform recess (recessus sacciformis) – synovial fold over neck of radius to allow rotation Ligaments of the Elbow Joint: • Ulnar collateral ligament (ligamentum collaterale ulnare)  • From medial epicondyle (epicondylus medialis) to ulna  • Consists of anterior, posterior, and oblique bands  • Stabilizes against valgus stress • Radial collateral ligament (ligamentum collaterale radiale)  • From lateral epicondyle (epicondylus lateralis)  • Blends with annular ligament • Annular ligament of radius (ligamentum anulare radii)  • Encircles the head of radius and holds it in the radial notch  • Allows pronation and supination • Quadrate ligament (ligamentum quadratum)  • Short band between neck of radius and radial notch of ulna  • Adds rotational stability Common Elbow Joint Injuries & Conditions: • Nursemaid’s elbow (radial head subluxation) – common in children • Olecranon bursitis – inflammation of the subcutaneous olecranon bursa • Valgus overload injuries – from throwing or trauma • Dislocation of the radial head – due to annular ligament weakness in toddlers • Elbow arthritis – affects the entire joint capsule due to shared synovial cavity Bursae of the Elbow Joint: • Subcutaneous olecranon bursa (bursa subcutanea olecrani) – between skin and olecranon (olecranon) • Subtendinous triceps bursa – beneath triceps tendon • Function: reduce friction during movement Movements of the Elbow Joint: • Flexion / Extension – at humeroulnar and humeroradial joints • Pronation / Supination – at proximal radioulnar joint Structures Mentioned in the Video: • Trochlea of humerus (trochlea humeri) • Capitulum of humerus (capitulum humeri) • Radial notch of ulna (incisura radialis ulnae) • Articular circumference of radius (circumferentia articularis radii) • Articular facet of radius (fovea articularis radii) • Olecranon of ulna (olecranon) • Medial epicondyle (epicondylus medialis) • Lateral epicondyle (epicondylus lateralis) • Neck of radius (collum radii) • Radial head (caput radii) Clinical Relevance Summary: • Joint stability maintained by ligaments and capsule • Joint motion involves coordinated action of all three articulations • Common injuries include ligament tears, bursitis, and nursemaid’s elbow • Ligaments and bursae are frequent sources of pain in overuse or trauma Sources: • Kozlowski, T. (2017). Memorix Anatomy, 2nd ed. • Standring S. (2020). Gray’s Anatomy, 42nd edition • Tubbs RS, Shoja MM, Loukas M. (2016). Bergman’s Encyclopedia of Human Anatomic Variation • White TD, Folkens PA. (2005). The Human Bone Manual Programs used: Complete Anatomy, Biorender, PowerPoint