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biosystems
joints
18
Biology
Professional
09/15/2011

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Term
articulation
Definition
where two or more bones meet
Term
functions of joints
Definition
give skeleton mobility and hold skeleton together (skull). generally named according to the bones involved in the joint.
Term
synarthroses
Definition
immovable joint (skull)
Term
amphiarthroses
Definition
slightly movable (pubic symphysis)
Term
diarthroses
Definition
freely movable (synovial)
Term
flexion
Definition
decreasing joint angle
Term
extension
Definition
increasing joint angle
Term
hyperextension
Definition
increase joint angle even more beyond set point.
Term
flexion of neck
Definition
move neck to chest
Term
extension of neck
Definition
move neck back from forward position
Term
hyperextension of neck
Definition
neck is on back's side
Term
shoulder movements
Definition
flexion: move arm forward
extension: move arm back from forward
hyperextension: arm goes to back side
Term
knee movements
Definition
flexion: leg goes backwards
extension: leg goes forward from back position
Term
abduction
Definition
move further away from body
Term
adduction
Definition
move closer to body
Term
movement of upper limb at shoulder
Definition
abduction: move arm away from side of body
adduction: bring arm back to side
circumduction: move arm in circle
Term
lateral rotation
Definition
rotate limb towards outside of body
Term
medial rotation
Definition
rotate limb towards inside of body
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