1. 10-1

2. 10-2 Muscular System Gross Anatomy Chapter 11

3. 10-3 General Principles Tendons: Attach muscles to bones –Aponeurosis: A very broad tendon Muscles –Origin or head: Muscle end attached to more stationary of two bones –Insertion: Muscle end attached to bone with greatest movement –Belly: Largest portion of the muscle between origin and insertion –Synergists: Muscles that work together to cause a movement Prime mover: Plays major role in accomplishing movement Agonist: Muscle causing an action when contracts Antagonist: A muscle working in opposition to agonist –Fixators: Stabilize joint/s crossed by the prime mover

4. 10-4 Muscle Shapes

5. 10-5 Muscle Shapes

6. 10-6 Nomenclature Muscles are named according to: –Location: pectoralis gluteus, brachial –Size: maximus, minimus, longus, brevis –Shape: deltoid, quadratus, teres –Orientation: rectus –Origin and insertion: sternocleidomastoid, brachioradialis –Number of heads: biceps, triceps –Function: abductor, adductor, masseter

7. 10-7 Muscle Movements Muscle contractions are a pull or force by relative positions of –Lever: Rigid shaft or bone –Fulcrum: Pivot point or joint –Weight or resistance

8. 10-8 Classes of Levers Class I –Fulcrum between force and weight –Seesaw or head movement Class II –Weight is between fulcrum and pull –Wheelbarrow, standing on toes Class III –Pull located between fulcrum and weight –Person using a shovel –Most common

9. 10-9 Muscle Anatomy: Anterior View

10. 10-10 Muscle Anatomy: Posterior View

11. 10-11 Muscles of the Neck

12. 10-12 Muscles of Facial Expression

13. 10-13 Muscles of Mastication

14. 10-14 Muscles of Respiration

15. 10-15 Muscles of the Abdominal Wall

16. 10-16 Muscles of Pelvic Floor and Perineum

17. 10-17 Muscles of the Arm

18. 10-18 Muscles of the Forearm

19. 10-19 Muscles of the Thigh

20. 10-20 Muscles of the Leg

21. 10-21 Muscles of the Leg

22. 10-22 Muscles of the Foot