The Muscular System This ppt: 15 slide PART A-B 32 slides

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 Insertion = Origin= 5. Muscles can be Prime-movers: Synergists: Antagonists: 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

Types of Body Movements … c. *Abduction: d. *Adduction:

e. Rotation f. Circumduction

g. Special Names for Foot Movements i) Dorsiflexion = is Flexion ii) Plantar flexion = is Extension Memory Tip: POINT your TOES DOWN to the GROUND where u will PLANT your PLANTS

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: bottom of Mandible Origin Bones: Zygomatic Bone b. *Temporalis— *Description/Location Insertion: Temporal bone Origin: top of Mandible 2. Neck *Sternocleidomastoid Action Insertion: Occipital bone, Origin: Sternum and clavicle

*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: horizontal muscle at the bottom boundary of Thoracic Cavity Action: Changes vertical length of Thoracic Cavity NOT IN BOOK Intercostals Intercostal muscles Diaphragm Inferior View Anterior View

2. Muscles that move the Vertebral Column *Abdominal girdle 4 layers = 4 muscles *Location & Description: Type of Tendon: 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 Main part of muscle is in Brachium, above antebrachium a. *Biceps brachii *Description/Location Action Origin: Insertion: b. *Triceps brachii Antagonist to _______________

C. Muscles that move the Lower Limb Muscles that move the Thigh Major part of muscle in hip, above 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 Major part of muscle is in thigh, above the lower leg *Hamstring group: 3 separate muscles *Description/Location Action Origin: posterior Coxal Bone Insertion: posterior tibia

b) Muscles causing movement at the knee joint … b. Quadriceps group-- 4 4 separate muscles with the same tendon for insertion *Description/Location Action Origin: anterior femur Insertion: Tibial Tuberosity of Tibia

3. Muscles causing movement at ankle Major part of muscle is in thigh, above the lower leg 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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