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Articulations

joints

QuestionAnswer
Articulation (joint) point of contact between bones, cartilage and bone, or teeth and bones
Arthology the study of joints
Arthritis inflamation of a joint
Rheumatoid Arthritis primary symptom is synovitis
Osteoarthritie wear and tear on joint surfaces
Gouty Arthritis due to elevated uric acid concentrations
Synarthroses immovable joints
Amphiarthroses slightyly moveable joints
Diarthroses freely moveable joints
Functional Method of Classification based on the degree of movement permitted by the joints
Structureal Method of Classification based on the presence or absense of a space (synovial cavity) between bones and the kind of connective tissue that binds the bones together
Fibrous Joints sutures, syndesmosis, and gomphosis
Sutures located between the skull bones; interlocking and overlapping; synostoses; synarthrotic Names: coronal, squamosal, lambdoidal, and sagittal
Synostoses joints present during growth but replaced by bone in adult (ex: right and left halves of frontal bone
Syndesmosis bone surfaces are united by larger amound of fibrous connective tissue; not as tight as a suture; amphiarthrotic Ex: distal articulation of tibia with fibula; radioulnar interosseus membrane
Gomphosis cone shaped peg fits into a socket; synarthrotic Ex: roots of teeth in maxillae or mandible
Cartilaginous Joints no joint cavity; bones are connected by cartilage
Synchondrosis hyaline cartilage is the connecting material; synarthrotic most common at epiphyseal plate- in time it becomes a synostosis; located between first rib and manubrium
Symphysis fibrocartilage makes up connecting material; amphiarthrotic Ex: between vertebrae, at pubis Note: dentary bones fuse into the mandible and mental symphysis becomes a mental protuberance, a synostosis
Synovial Joints have a cavity, articular capsule unites bones; fibrous capsule-collagenous CT; some joints have menisci of fibrocartilage (shock absorbing); all are diarthrotic
Gliding Joints flat articular surfaces, one bone slides over the other in several directions Ex: carpals and tarsals; sternum-clavicle; superior and inerior articular processes of vertebrae
Hinge Joints convex surface of one bone fits into concave surface of the other Ex: elbow; knee with patella (sesmoid bone)
Pivot Joint rounded, pointed or conical surface of one bone articulates with the shallow depression of another bone Ex: atlas-axis; proximal ends of radius and ulna
Ellipsoidal/Condyloid Joint oval shped condyle of one bone fits into the elliptical cavity of another bone Ex: metacarpal bone-proximal phalanx
Saddle Joint articular surfaces of both bones are saddle-shaped (concave in one direction and convex in the other) Ex: trapezium metacarpal of thumb
Ball and Socket ball like surface fits into cup like depression Ex: humerus with glenoid fossa of scapula; femur with acetabulum of coxal bone (ilium, ischium, and pubis)
Created by: sc26