MUSCLES Approximately 40 of your body weight Approximately

MUSCLES � � � Approximately 40% of your body weight Approximately 650 muscles Muscles only pull (they can’t push) You have over 30 facial muscles Eye muscles move more than 100, 000 times a day

There are 3 types of muscle tissue 1. 2. 3. Skeletal Cardiac Smooth

Skeletal Muscles � � Definition - organs that are composed mainly of skeletal muscle tissue, but they also contain connective tissues, nerves, and blood vessels. Each cell is a single muscle fiber. Muscle fibers form bundles called fascicles. Directly or indirectly attached to the bones of the skeleton

Skeletal Muscle Functions Muscle plays six important roles in the body: 1. Produce skeletal movement 2. Maintains posture and body position 3. Support soft tissues (abdominal wall & pelvic cavity) 4. Guard entrances and exits (digestive and urinary tracts) 5. Maintain body temperature (energy is converted to heat) 6. Store nutrient reserves (proteins are broken down & amino acids are used)

Head and Neck Muscles Figure 6. 14 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 6. 38

Trunk Muscles Figure 6. 15 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 6. 39

Deep Trunk and Arm Muscles Figure 6. 16 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 6. 40

Muscles of the Pelvis, Hip, and Thigh Figure 6. 18 c Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 6. 41

Muscles of the Lower Leg Figure 6. 19 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 6. 42

Superficial Muscles: Anterior Figure 6. 20 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 6. 43

Superficial Muscles: Posterior Figure 6. 21 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 6. 44

Body Movements Figure 6. 13 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 6. 33

Special Movements · Dorsifelxion · Plantar flexion

Special Movements · Inversion · Eversion Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 6. 34

Special Movements · Opposition · Supination · Pronation

Ankle Sprains

Examples of Strains