An agonist muscle causes movement through concentric contraction and an antagonist muscle controls the movement through:
Show Hint
The Muscle Action Duo:
- Agonist (Prime Mover): Shortens its length ($\mathbf{\rightarrow \leftarrow}$) via Concentric Contraction to accelerate and drive the movement.
- Antagonist (Opposing Controller): Lengthens its structure ($\mathbf{\leftarrow \rightarrow}$) via Eccentric Contraction to decelerate, stabilize, and smoothly control the joint action.