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Exercise 13. Articulations & Body Movements. 3 Types of Body Joints. Fibrous Joints Cartilaginous Joints Synovial Joints. Fibrous Joints. Bones joined by fibrous tissue Immovable Skull sutures. Table 9-2. Cartilaginous Joints. Bones joined by cartilage Rigid or slightly moveable
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Exercise 13 Articulations & Body Movements
3 Types of Body Joints • Fibrous Joints • Cartilaginous Joints • Synovial Joints
Fibrous Joints • Bones joined by fibrous tissue • Immovable • Skull sutures Table 9-2
Cartilaginous Joints • Bones joined by cartilage • Rigid or slightly moveable • Rib + costal cartilage + sternum, vertebrae + discs, pubic symphysis + coxal bones Table 9-2
Synovial Joints • Bones separated by a joint CAVITY • 2-layered joint capsule • Contains synovial fluid • Freely moveable • Most of the joints you usually think of Table 9-2
Types of Synovial Joints • Hinge • Pivot Fig. 9-6
Types of Synovial Joints • Condyloid • Ball and Socket Fig. 9-6
3 Joints in One: KNEE • Largest, most complex of body • Extension, flexion, rotation Fig. 9-12
Meniscus: semilunar cartilage Fig. 9-12
Ligaments Inside Joint Capsule: ACL, PCL Fig. 9-12
Ligaments Outside Joint Capsule Fig. 9-12
Ligaments Outside Joint Capsule Fig. 9-12
Movements of Synovial Joints • Flexion: reduce distance b/w 2 bones • Extension: increase • Abduction: move limb away from midline • Adduction: toward midline Fig. 9-3
Movements of Synovial Joints • Pronation: palm up, turns down (radius & ulna crossed) • Supination: palm down, turns UP (bones parallel) Fig. 9-4
Movements of Synovial Joints • Dorsiflexion: ankle moves dorsally (stand on heel) • Plantar flexion: ankle moves & flexes foot (stand on toes) Fig. 9-5