Anatomy Lab Practical 3

Primarily responsible for producing a particular movement

Oppose or reverse a movement

Aid the action of agonists

Specialized synergists that immobilize the origin of the agonist muscle so all tension is exerted at the insertion

1. direction of muscle fiber 2. relative size of muscle 3. location of muscle 4. number of origins 5. location of muscle origin/insertion 6. shape of muscle 7. action of muscle

Straight line

Right angles

Largest

Long

2 origins

Origins at the sternum (sterno) and clavicle (cleido) with insertion at the mastoid process

Triangular

Adduction-bring closer to origin

Close/protrude lips

Raise eyebrows