1. Gross Anatomy of Muscle

3. All skeletal muscles: Attach to bone at no fewer than 2 points Origin
Attachment to an immovable bone
Often numerous origins for optimum force throughout the range of motion
Insertion
Attachment to a moveable bone
When contraction occurs, the insertion moves towards the origin

4. Test these ideas

5. Test these ideas
6. The insertion moves towards the origin.

6. Muscle Type based on fascicle arrangement

7. Prime mover—muscle with the major responsibility for a certain movement. Muscles that are normally trained during weight training.
Antagonist—muscle that opposes or reverses a prime mover

8. Synergist—muscle that aids a prime mover in a movement
Synergist—muscle that aids a prime mover in a movement. They are not meant to be the main action causing muscle for the desired movement.

9. Fixator—(special type of synergist)
stabilizes the origin of a prime mover