Elbow and Knee Joints PDF

9-5 Elbow and Knee Joints  Elbow joint – Hinge joint – Articulations involve humerus, radius, and ulna 1 © 2018 Pearson Education, Inc.  9-5 Elbow and Knee Joints  Joints of the elbow – Humer...

9-5 Elbow and Knee Joints  Elbow joint – Hinge joint – Articulations involve humerus, radius, and ulna 1 © 2018 Pearson Education, Inc.  9-5 Elbow and Knee Joints  Joints of the elbow – Humero-ulnar joint Largest, strongest joint at elbow Between trochlea of humerus and trochlear notch of ulna Limited movement – Humeroradial joint Smaller joint Articulation between capitulum of humerus and head of radius 2 © 2018 Pearson Education, Inc.  9-5 Elbow and Knee Joints  Structures of the elbow – Biceps brachii muscle Attaches to radial tuberosity Controls elbow motion – Elbow ligaments Radial collateral Anular Ulnar collateral 3 © 2018 Pearson Education, Inc. Figure 9–7a The Right Elbow Joint Showing Stabilizing Ligaments. Humerus Radial collateral Radial Antebrachial ligament tuberosity interosseous membrane Radius Ulna Capitulum Anular ligament (covering head and neck of radius) a Lateral view 4 Figure 9–7b The Right Elbow Joint Showing Stabilizing Ligaments. Tendon of biceps Anular Humerus brachii muscle ligament Articular capsule Antebrachial interosseous membrane Medial epicondyle Ulnar Radius collateral ligament Ulna Olecranon of ulna b Medial view 5  9-5 Elbow and Knee Joints  Knee joint – Complex hinge joint – Transfers weight from femur to tibia – Three articulations Two femur–tibia articulations – At medial and lateral condyles One between patella and patellar surface of femur 6 © 2018 Pearson Education, Inc.  9-5 Elbow and Knee Joints  Joint capsule and joint cavity of knee – Medial and lateral menisci Fibrocartilage pads At femur–tibia articulations Cushion and stabilize joint 7 © 2018 Pearson Education, Inc.  9-5 Elbow and Knee Joints Seven major supporting ligaments 1. Patellar ligament (anterior) 2. & 3. Two popliteal ligaments (posterior) 4. & 5. Anterior and posterior cruciate ligaments (inside joint capsule) 6. & 7. Tibial collateral ligament (medial) and fibular collateral ligament (lateral) 8 © 2018 Pearson Education, Inc. Figure 9–8a The Right Knee Joint. Quadriceps tendon Ligaments that Stabilize Patella the Knee Joint Patellar retinaculae Tibial collateral ligament Fibular collateral Patellar ligament ligament Fibula Tibia a Anterior view, superficial layer 9 Figure 9–8b The Right Knee Joint. Patellar surface Ligaments that Stabilize the Knee Joint Posterior cruciate ligament Lateral Medial Anterior cruciate condyle condyle ligament Tibial collateral ligament Menisci Medial Fibular collateral ligament Tibia Lateral Cut tendon of biceps femoris muscle Fibula b Deep anterior view, flexed 10 Figure 9–8c The Right Knee Joint. Plantaris muscle Gastrocnemius Femur muscle, Gastrocnemius muscle, medial head lateral head Ligaments that Stabilize the Knee Joint Bursa Tibial collateral Joint ligament capsule Fibular collateral ligament Popliteal ligaments Cut tendon of Popliteus biceps femoris muscle Tibia muscle Fibula c Posterior view, superficial layer 11