Presentation on theme: "JOINTS OF THE SKELETAL SYSTEM. FUNCTIONS OF JOINTS Bind parts of the skeletal system Allow bone growth Allow growth of the brain Allow changes in shape."— Presentation transcript:
JOINTS OF THE SKELETAL SYSTEM
FUNCTIONS OF JOINTS Bind parts of the skeletal system Allow bone growth Allow growth of the brain Allow changes in shape during childbirth Enable movement
CLASSIFICATION OF JOINTS Based On Movement Synarthrotic—immovable Sutures of skull Amphiarthrotic—slightly movable Distal tibiofibular articulation Diarthrotic—freely movable Knee
CLASSIFICATION OF JOINTS Based on Construction Materials Fibrous CT holds bones together (distal tibiofibular joint) Cartilaginous Hyaline or fibrocartilage hold bones together (between manubrium and first rib) Synovial Presence of synovial membrane (knee)
SYNOVIAL JOINTS PIVOT BALL and SOCKET HINGE CONDYLOID SADDLE GLIDING
Pivot: Radio-Ulnar Joint Between the head of the radius and the radial notch of the ulna. Allows for pronation (palm turns posterior) and supination (palm turns anterior).
Range of Movement Abduction-Adduction Abduction is limited by greater trochanter hitting acetabulum Flexion-Extension Lateral, Medial Rotation
Ball and socket: Shoulder
Shoulder Movements Movement in 3 planes: Abduction - away from the body until vertical. Adduction -brings arms back toward body. Rotation Extensive range comes at the expense of joint stability. Rotator cuff muscles--movement and stabilization of the joint.