Bone-Muscle Relationships For Skeletal Muscles

Question 1

Origin

Answer 1

Proximal attachment site, on LESS moveable bone

Question 2

Insertion

Answer 2

Distal attachment site, on MORE moveable bone

Question 3

Hard origins/insertions vs. Soft origins/insertions

Answer 3

An origin/insertion is HARD when attached to bone.

An origin/insertion is SOFT when attached to connective tissue.

Question 4

Agonist

Answer 4

Prime mover

Ex: Elbow flexion- biceps brachii is agonist

Question 5

Antagonist

Answer 5

Oppose movement

Ex: Elbow flexion- triceps brachii is antagonist

Question 6

Synergist

Answer 6

Muscles that assist prime movers (agonistic muscles)

Ex: Elbow flexion- brachial is is a synergistic of biceps brachii

Question 7

Cocontraction

Answer 7

Agonists and antagonists contract simultaneously, so there is no joint movement (isometric contraction).