Definitions Of Joint Actions

Question 1

Define Flexion

Answer 1

Bending, decreasing the angle between two bones.

Question 2

Define Extension

Answer 2

Straightening, increasing the angle between two bones (the opposite action to flexion).

Question 3

Define Abduction

Answer 3

Moving the bone away from the centreline of the body in either the horizontal or vertical plane.

Question 4

Define Adduction

Answer 4

Moving the bone towards the centreline of the body in either the horizontal or vertical plane (the opp action to abduction).

Question 5

Define Pronation

Answer 5

Moving the bones of the forearm so that the radius and ulna cross over each other (palms down).

Question 6

Define Supination

Answer 6

Moving the bones of the forearm so that the radius and ulna are parallel (palms up).

Question 7

Define Inversion

Answer 7

Moving the sole of the foot inwaards at the ankle joint (the opposite action to eversion).

Question 8

Define Eversion

Answer 8

Moving the sole of the foot outwards at the ankle joint.