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?
Physical Education - Joint actions
Make sure you understand the following terms:
* plantar flexion
* dorsi flexion
Involves decreasing the angle between two bones, e.g. bending the elbow
Increasing the angle between two bones, e.g. bending backwards at the
Moving body parts away from the body's midline
Moving bones towards the body's midline
Turning the hand to have it palm downwards (radius and ulna are crossed)
Palms facing upwards (radius and ulna are uncrossed and parallel)
Moving the sole of the foot inwards at the ankle
Moving the sole of the foot outwards at the ankle
Pointing the toes upwards towards the tibia
Pointing the toes away from the tibia
Moving the end of a bone so that it makes a circle
Moving the bone around a central axis
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