Transcript Range of Movement

Range of Movement
By the end of this lesson, I will be
able to:
• Understand how muscles work together to
move my bones.
• Know the different ranges of movement my
body allows.
Recap
How do we move?
• Muscles pull on our bones.
• One contracts while the other relaxes.
Muscles as Pairs
• Muscles work in pairsantagonistic muscle action.
• The muscle that contracts is known as the prime
mover or the agonist (In agony!!).
• The muscle that relaxes is known as the
antagonist.
• The prime mover is also helped by other
muscles called synergists which hold the body in
position for the prime mover to work smoothly.
Muscles as Pairs
• A voluntary muscle usually works across a
joint.
• It is attached to both bones by strong
cords called tendons.
Muscles as pairs
• When a muscle contracts, usually one bone
moves.
• The other is stationary.
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• The origin is where the muscle joins the
stationary bone.
• The insertion is where the muscle joins the
moving bone.
Muscles as pairs
• When a muscle contracts, the insertion
moves towards the origin.
Range of movement
1. Extension – Opening
of a joint.
2. Flexion – Closing of a
joint.
Range of movement
3. Adduction – Moving
towards an imaginary
centre line.
4. Abduction – Moving
away from an
imaginary centre line.
Range of movement
5. Rotation – Turning a
limb clockwise or
anticlockwise.