roles of muscles + types of contraction Flashcards
1
Q
what is the agonist muscle
A
A muscle responsible for creating movement at a joint. Also known as the
prime mover.
2
Q
what is the antagonist muscle
A
A muscle that opposes the agonist
providing resistance for co-ordinated
movement.
3
Q
what is antagonist muscle action
A
- Muscles often worked in antagonistic pairs.
- when the agonist muscle shortens to
create movement, the antagonist lengthens to co-ordinate the action.
4
Q
what is the fixator muscle
A
A muscle that stabilises one part of a
body while another causes movement.
5
Q
what are the types of muscle contraction
A
- isotonic
- isometric
6
Q
what are the types of isotonic muscle contraction
A
- concentric
- eccentric
7
Q
what is an isotonic muscle contraction
A
a muscle changes length during its contraction.
8
Q
what is a concentric isotonic muscle contraction
A
- a muscle shortens producing tension.
- This produces the force to pull two bones closer together, causing joint movement.
9
Q
what is an eccentric isotonic muscle contraction
A
- a muscle lengthens producing tension.
- This resists forces, such as gravity, to control joint movement.
10
Q
what is an isometric muscle contraction
A
- a muscle contracts but does not change length
- The muscle creates tension as it pulls on the tendon attachment; however, no
movement is created and posture is maintained.
