1. Muscular System Objectives: Review anatomical terminology.
Review types of joint movements.
Compare and contrast types of muscle.

2. What is the opposite of:
Inferior
Anterior
Medial
Distal
Superficial

3. More review and assignments:
Figure 17-2 (Lab Manual)
Venn diagram of the three types of muscle. Add any other general information you know about muscle.
Homework:
Add Chapter 8 roots, prefixes, and suffixes to medical terminology sheet (Vocabulary quiz on Wednesday!!!)
Medical journal article on a disease or disorder of the muscular system due on test day

4. Muscle Tissues Skeletal muscle tissue (“voluntary”)
Long, threadlike cells
Striations: alternating light and dark cross-markings
Each cell has many nuclei just beneath the cell membrane.

5. Muscle Tissues (cont.) 2. Smooth muscle tissue (“involuntary”)
No striations
Cells are shorter than skeletal muscle, spindle-shaped, and have one, centrally located nucleus.
Line walls of internal organs

6. Muscle Tissues (cont.) 3. Cardiac muscle tissue – heart
Striated and joined end-to-end
Each cell has only one nucleus ???
How would you be able to differentiate b/t skeletal and cardiac muscle tissue, since both are striated?

7. Types of Muscle Tissue (p.185):

8. Skeletal Muscle Actions
Movement depends on type of joint the muscle is associated with
Origin & Insertion:
Origin – the end of the muscle that is fastened to a relatively immovable or fixed part
Insertion – the end connected to the movable part on the other side of the joint
When muscles contract, its insertion is pulled toward its origin (EX: biceps brachii)

9. Interaction of Skeletal Muscles
Prime mover – the muscle responsible for MOST of the movement (aka, agonist)
Synergist - ???
Antagonist - ???

10. Major Skeletal Muscles
Names may indicate location, size, shape, action, number of attachments, or direction of muscle fibers:
Pectoralis major
Deltoid
Extensor digitorum
Biceps brachii
Sternocleidomastoid
External oblique 1 2 3 4 5

11. Muscles of Facial Expression
“It takes more muscles to frown than it does to smile.”
More than 600 skeletal muscles in the body – 60 in the face!
40 used to frown
20 used to smile
Smallest muscle is the stapedius, in the middle ear
Largest - ???
Longest - ???

12. Muscles of Facial Expression (p.188) and Mastication (p.190)
***Epicranius has 2 parts:
frontalis and occipitalis.

13. Muscles That Move the Head
Add these muscles to your head drawing.

14. Muscles That Move the Pectoral Girdle (p.191)
Closely associated with those that move the arm
Many move the scapula up, down, backward, and forward

15. Muscles That Move the Arm
Grouped according to primary actions:
Flexors
Coracobrachialis
Pectoralis major
Extensors
Teres major
Latissimus dorsi
Abductors
Supraspinatus
Deltoid
Rotators
Subscapularis
Infraspinatus
Teres minor

16. Muscles That Move the Arm (p.193)

17. Muscles That Move the Forearm
Flexors
Biceps brachii
Brachialis
Brachioradius
Extensor
????
Rotators
Supinator
Pronator teres
Pronator quadratus (square shaped)

18. Muscles That Move the Forearm (p.194)

19. Muscles That Move the Wrist, Hand, and Fingers
Flexors
Flexor carpi radialis
Flexor caroi ulnaris
Palmaris longus
Flexor digitorum profundus
Extensors
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor carpi ulnaris
Extensor digitorum

20. Muscles That Move the Wrist, Hand, and Fingers (p.195)