Chapter 7 lesson 4

Question 1

Agonists

Answer 1

The primary muscles providing force for a movement.

Question 2

Synergists

Answer 2

Muscles that assist agonists to produce a movement.

Question 3

Stabilizers

Answer 3

Muscles that contract isometrically to stabilize the trunk and joints as the body moves.

Question 4

Feed-forward activation

Answer 4

When a muscle is automatically activated in anticipation of a movement.

Question 5

Antagonists

Answer 5

Muscles on the opposite side of a joint that are in direct opposition of agonist muscles.

Question 6

CLOSED-CHAIN MOVEMENTS

Answer 6

The primary characteristic of closed-chain movements is that the distal segments, such as a person’s hands or feet, are fixed and remain in contact with a stationary surface.

Question 7

OPEN-CHAIN MOVEMENTS

Answer 7

The primary characteristic of open-chain movements is that the distal segments (hands and feet) are not fixed, and they are free to move in space. Additionally, open-chain exercises have independent joint movement of only the segments distal to the moving joint itself