XSIQ
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Physical Education - Joint actions
Joint actions
Make sure you understand the following terms:
* flexion
* extension
* abductions
* circumduction
* rotation
* plantar flexion
* dorsi flexion
* supination
* pronation
MOVEMENT
DEFINITION/EXAMPLE
Flexion
Involves decreasing the angle between two bones, e.g. bending the elbow
or leg
Extension
Increasing the angle between two bones, e.g. bending backwards at the
trunk
Abduction
Moving body parts away from the body's midline
Adduction
Moving bones towards the body's midline
Pronation
Turning the hand to have it palm downwards (radius and ulna are crossed)
Supination
Palms facing upwards (radius and ulna are uncrossed and parallel)
Inversion
Moving the sole of the foot inwards at the ankle
Eversion
Moving the sole of the foot outwards at the ankle
Dorsiflexion
Pointing the toes upwards towards the tibia
Plantar flexion
Pointing the toes away from the tibia
Circumduction
Moving the end of a bone so that it makes a circle
Rotation
Moving the bone around a central axis
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a voluntary muscle usually works across a joint.origin and insertion:when a muscle contracts, usually just one bone moves. the other is stationary. the origin is where the muscle joins the stationary bone. the insertion is where it joins the moving bone. when a muscle contracts, the insertion moves towards the origin.
Whnt actions of different muscle groups?at are joi
Joint actions :- Make sure you understand the following terms: Movement Flexion Extension Abduction Adduction Pronation Supination Inversion Eversion Dorsiflexion Plantar flexion Circumduction Rotation
What are the joint action of muscles?