PSIO 201 5th Edition Lecture 16 Outline of Last Lecture Skeletal System Outline of Current Lecture Current Lecture I Articulations II Shoulder Joint III Knee joint IV Arthritis What is an Articulation point of contact between bones Structural fibrous or cartilaginous or synovial 1 immovable synarthrosis 2 Slightly movable amphiarthrosis 3 Freely Movable diarthrosis synchondrosis following joint with least amount of movement Synarthrosis immovable Fibrous Sutures Amphiarthrosis slightly movable Tibia and fibula Fibrous Gomphosis teeth Pubic symphysis Synchondrosis cartilaginous Diarthrosis freely movable Hinge joint between trochlea of humerus and trochlae notch of ulna Pivot joint between head of radius and radial notch of ulna ALL DIARTHROSES ARE SYNOVIAL Synovial Fluid Ball and socket joint triaxial Synovial structure of Diarthroses synovial Fluid is important and healthy cartilage Synovial Fluid lubrication absorbs shock cushion the joint Accessory ligaments Intracapsular and extracapsular tendons Bursae Menisci Shoulder Joint Diarthrosis freely movable tri axial more prone to injury Stabilized by 5 ligaments Five Major Muscles Coracohumeral ligament Glenohumeral Ligament Traverse Humeral Ligament Tendon of supraspinatus muscle Tendon of Subscapilaris muscle Glenoid Labrum Suction cup keeps it for detaching and allows rotation ALL Extrascapular Knee Joint Diarthrosis freely movable Mono axial joint Medial and Lateral menisci cushion the joint 7 ligaments stabilize the joint 2 extracapsular oblique popliteal ligament Arcuate popliteal Ligament 2 Intracapsular Anterior Cruciate Ligament Posterior Cruciate Ligament Arthritis 2 Common Types 1 Osteoarthritis OA degenterative bone to bone 2 Rheumatoid RA inflammatory inflames synovial membrane Rist Factors OA Heredity Overweight Joint injury Repeated overuse Aging Lack of physical activity Nerve injury
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