Classification of Skeletal Muscles
Several criteria were given for the naming of muscles. Match the criteria (column B) to the muscle names (column A). Note that more than one criterion may apply in some cases.

Column A

gluteus maximus

relative size of the muscle

adductor magnus

action of muscle

biceps femoris

number of origins

transverse abdominis

direction in which the muscle fibers run relative to some imaginary line

extensor carpi ulnaris

action of the muscle

trapezius

shape of the muscle

rectus femoris

direction in which the muscle fibers run relative to some imaginary line

external oblique

location of the origin and/or insertion of the muscle

Match the key terms to the muscles and movements described below.

term for the biceps brachia during elbow flexion

prime mover (agonist)

term that describes the relation of brachial is to biceps brachii during elbow flexion

synergist

term for the triceps brachii during elbow flexion

antagonist

term for the iliopsoas during hip extension

prime mover (agonist)

term for the gluteus maximus during hip extension when walking up stairs

antagonist

term for the rotator cuff muscles and deltoid when the elbow is flexed and the hand grabs a tabletop to lift the table

fixator