Bones, Muscles, and Joints

Question 1

Agonist

Answer 1

any muscle that produces a certain effect

Question 2

Antagonist

Answer 2

a muscle which produces the opposite action to counteract the agonist

Question 3

Synergist

Answer 3

support agonist action and eliminate unwanted effects
example:
agonist-biceps brachii
antagonist-triceps brachii
synergist-omotransversarius, helps prevent unwated movement of the scapula

Question 4

Fixator

Answer 4

stabilize a joint
example:
Supraspinatus, infraspinatus, subscapularis work as fixators of the shoulder (forelimb) when the limb is bearing weight