Actions Of Muscles

Question 1

Synergistic

Answer 1

2 muscles that are synergistic act together to produce an action

Question 2

Antagonistic

Answer 2

2 muscles that are antagonistic act against each other (produce the opposite motion)

Question 3

Flexion

Answer 3

Decrease in joint angle

Question 4

Extension

Answer 4

Increase in joint angle

Question 5

Rotation

Answer 5

Where the angle between 2 bones does not change, but the axis move relative to one another.
E.g rotating the head to look sideways

Question 6

Abduction

Answer 6

Movement away from the midline
Arms away from the body and legs away from the other leg.
Fingers movement away from the middle finger

Question 7

Adduction

Answer 7

Moving the limbs towards the midline

Question 8

Lateral flexion

Answer 8

The trunk bends over at the hips and can also happen in the neck.

Question 9

Pronation

Answer 9

Rotation of forearm so the palm faces posteriorly

Question 10

Supination

Answer 10

Rotation of the forearm so the palm of the hand faces anteriorly

Question 11

Protraction

Answer 11

To move forward.

E.g the jaw moving forward

Question 12

Retraction

Answer 12

To move backwards

E.g the jaw moving backwards

Question 13

Opposition

Answer 13

Special movement where the thumb is rotated to meet the little finger

Question 14

Inversion

Answer 14

The sole of the foot faces inwards towards the other foot

Question 15

Eversion

Answer 15

Sole of foot faces outward