Synergist
A muscle that assists another muscle to accomplish a movement.
Stabilizer
A muscle that contracts with no significant movement to maintain a posture or fixate a joint.
Dynamic Stabilizer
A biarticulate muscle that simultaneously shortens at the target joint and lengthens at the adjacent joint with no appreciable difference in length. Dynamic stabilization occurs during many compound movements. The dynamic stabilizer assists in joint stabilization by countering the rotator force of an agonist. See example diagram: Hamstring weakness (during squat or leg press)
|