The Muscular System PART A-C 37 slides 2 hours & 15 min

Ch6-A THE MUSCULAR SYSTEM I. OVERVIEW II. MUSCLE ANATOMY III. MUSCLE PHYSIOLOGY Types Muscles Gross Overview Tissue Review Microscopic Contraction Details Functions Nervous System Whole Muscle Cell Characteristics Energy for Contract. Muscle Tone Types of Contraction Effect of Exercise Ch 6-B IV. BODY MOVEMENTS V. SPECIFIC MUSCLES VI. INJECTION Rules Head & Neck SITES Muscle Movements Trunk & Arm Lower Limb

IV. Types of Body Movements A IV. Types of Body Movements A. **Six Golden Rules of Skeletal Muscle Activity = 6. If the muscle is located anteriorly, a body part will be moved anteriorly at the joint crossed (visa versa). Table 6.2

B. Muscle Movements, Types, & Names - Depend on the Mobility of the Specific Joint Types of Body Movements Often in pairs for opposite movement a. *Flexion b. *Extension *Opposite of flexion = Hyperextension

c. Rotation d. Circumduction

Types of Body Movements … e. *Abduction: f. *Adduction:

g. Special Movements i) Dorsiflexion = Flexion ii) Plantar flexion = Extension & Hyperextension

V. Gross Anatomy of Skeletal Muscles– Specific Muscles Figure 6.21

A. Head and Neck Muscles 1. Chewing muscles a. *Masseter *Description/location Action Insertion/Origin Bones b. *Temporalis— *Description/Location 2. Neck *Sternocleidomastoid Insertion/Origin

*Description/Location Action: moves Rib Cage to change B. Trunk & Arm Muscles Breathing Muscles *Intercostal muscles *Description/Location Action: moves Rib Cage to change width of Thoracic Cavity b. Diaphragm Description/Location: bottom boundary of Thoracic C Action: Changes vertical length of Thoracic Cavity Intercostals NOT IN BOOK Intercostal muscles Diaphragm

2. Muscles that move the Vertebral Column a. *Abdominal girdle– 4 layers *Location & Description: Action: b. Erector Spinae Description/Location

3. Muscles that move the Brachium *Latissimus Dorsi *Description & Location Action b. *Deltoid *Description/Location Insertion/Origin: c. *Pectoralis major

4. Muscles that move the Antebrachium a. *Biceps brachii *Description/Location Action Origin: ___ Insertion: ___ b. *Triceps brachii Antagonist to _______________

C. Muscles that move the Lower Limb 1. Muscles that move the Thigh a. *Gluteus maximus: *Description/Location Action b. Iliopsoas Description/ Location c. *Gluteal medius d. *Adductor muscles: Gluteus medius Iliopsoas Adductors

2. Muscles causing movement at the knee joint a. *Hamstring group: 3 *Description/Location Action Origin: posterior femur Insertion: posterior tibia

b) Muscles causing movement at the knee joint … b. Quadriceps group-- 4 *Description/Location Action Origin: anterior femur Insertion: anterior tibia

3. Muscles causing movement at ankle a. *Tibialis Anterior *Description/Location Action b. *Gastrocnemius

*VI. Intramuscular Injection Sites Shoulder Upper/Lateral Buttock Lateral Thigh Figure 6.18, 6.19b, d

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