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24 terms

Skeletal System-Joints and Movement, AH1

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Synovial Joint
Allows wide range of movement, contains synovial fluid
Synovial Membrane
Lines inside of capsule and secretes fluid
Articular Cartilage
Covers end of bones to prevent friction
Bursae
Sacs of synovial fluid
Ball & Socket Joint
Allows widest range of movement, hips and shoulders only
Hinge Joint
Moves in once direction or plane, allows flexion and extension e.g. elbow, knee, outer joints of fingers
Pivot Joint
rotate on a 2nd, arch-shaped bone, example: radius and ulna
Flexion
Bending at knee or elbow, raising arm and leg at shoulder and hip along sagittal plane
Extension
Straightening at knee or elbow, lowering arm and leg at shoulder and hip along sagittal plane
Plantarflexion
Pointing foot at hinge joint of ankle
Dorsiflexion
Bring toes towards shin at hinge joint of ankle
adduction
Moving arm at ball and socket joint of shoulder along transverse plane towards midline of body
abduction
Moving arm at ball and socket joint of shoulder along transverse plane away from midline of body
Bones articulating at shoulder
Humerus, Clavicle, Scapula
Bones articulating at hip
Femur, Pelvis
Bones articulating at knee
Femur, Tibia, Patella
Bones articulating at ankle
Tibia, Fibula, Tarsals
Synovial fluid
Lubricates and reduces friction between articulating bones
gliding joint
flat surfaces that glide across each other; example: vertebrae
suture
immovable joint in the skull
circumduction
circular movement of joint, combining movements; possible in shoulder joint, hip joint, and trunk around a fixing point
rotation
turns a bone on its own axis
pronation
rotation of the hands and forearms so that the palms face downward
supination
rotation of the hands and forearms so that the palms face upward