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Joints
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Joints - Articulation Classified –Extent of their function –Degree of movement –Structure - based on the presence or absence of joint cavity and supporting tissue.
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Joints Classified by Movement Synarthrosis - Immovable joint - generally fibrous joints. Amphiarthrosis - Limited movement - generally cartilaginous joints. Diarthrosis - Freely movable - generally synovial joints.
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Fibrous Joints Lack joint cavity Lack fibrous connective tissue Generally immovable in adults Types –Suture –Syndesmoses –Gomphoes
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Fibrous Joints Suture - tight union - movement rarely occurs. Skull bones Syndoesmoses - bones are close together but not touching, held together by collagenous fibers or ligaments. Radius & Ulna. Gomphoses - peg and socket. Tooth
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Suture Joint Movable in children Immovable in adults Only in skull
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Syndesmoses Joints Bones close together but not touching Held together with collagenous fibers. Example –Inferior tibiofibular –Ulna & Radius
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Gomphoses Joints Fibrous joint made up of a peg and socket. Example - teeth
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Synarthrodial- Immovable Joint Fibrous
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Cartilaginous Joints Bones united by a plate of hyaline cartilage or fibrocartilaginous disk Lack joint cavity Permits little or no movement Examples –Synchondrosis - epiphyseal –Symphysis - pubis, manubriosternal, invertebral joints
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Cartilaginous Joints Synchondrosis- Temporary joint composed of hyaline cartilage joining diaphysis and epiphysis. Symphysis - Bony surfaces bridged by flattened plates and disks of fibrocartilage.
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Amphiarthrodial - Cartilaginous Joints
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Synovial Joints Most of permanent joints Allows the greatest range of movement Ends of bones are covered with smooth catilage. Lubricated and nourished by thick fluid called synovial fluid Has a joint cavity
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Synovial Joints - Diarthrosis 4 essential structures of synovial joints Synovial Cavity - has a space between the two articulating bones. Articular cartilage Articular capsule - lines the synovial cavity and outer layer of capsule. Ligaments
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Synovial Joints Types –Hinge –Pivot –Condyloid –Gliding –Saddle –Ball-and Socket
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Types of synovial joints Hinge - elbow Pivot - radioulna joint Condyloid (modified ball-and-socket) knuckle joint except the thumb. Gliding - vertebrae, carpal and tarsal Saddle - Thumb Ball-and-socket - shoulder, hip
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Pivot Joint
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Condyloid Joint
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Ellipsoidal
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Ball and Socket
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Joints When things go Wrong!
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When things go WRONG! Arthritis - inflammation of the joint Osteoarthritis - degenerative arthritis, wear and tear arthritis, most common. Rheumatoid arthritis - most debilitating form of chronic arthritis, involves inflammation of the synovial membrane. Gouty arthritis - Gout, metabolic disease resulting in needle-shape crystals
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When things go WRONG! Bursitis - inflammation of one or more bursae Dislocation - 2 articulating surfaces become separated. Sprain - tearing of ligaments that follows the sudden wrench of a joint.
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Fetal Surgery
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Power Point Club foot (1) Flat feet 296pg (1) Bunion (1) Corns (1) Fractures 299-300 pg (11) Curvatures of spine 303-304 pg (3)
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TEST Chapter 7,8,9 Names of bones Types of bones - long, short, etc……(pg.230) Definitions of joints - match typed of joints (pg.312) Diseases and abnormalities - definitions. Bones with features; foramen,ridges ( Worksheets) Articulations Axial and appendicular skeleton. Types of fractures - comminuted, compound, greenstick, impacted. (pg. 299) Facts about bones!! STUDY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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