PTH 151 Unit 2 Lecture HO#1 Muscle Contraction PDF
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Tidewater Community College
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Summary
This document contains lecture notes on muscle contraction, covering functions, types, anatomy, and physiology. It's aimed at undergraduate-level students in a health-related field. The material includes diagrams and descriptions of muscle tissue.
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TIDEWATER COMMUNITY COLLEGE PTA PROGRAM VA BEACH CAMPUS **PTH 151 -- Unit 2 Lecture HO\#1-- Functions, Types, Anatomy and Physiology of Muscle Contraction** Reference: Trail Guide to Movement pg 41-44; pg. 91-102; pg. 110-115; Clinical Mechanics and Kinesiology pg. 35-46 [Learner Objectives]:...
TIDEWATER COMMUNITY COLLEGE PTA PROGRAM VA BEACH CAMPUS **PTH 151 -- Unit 2 Lecture HO\#1-- Functions, Types, Anatomy and Physiology of Muscle Contraction** Reference: Trail Guide to Movement pg 41-44; pg. 91-102; pg. 110-115; Clinical Mechanics and Kinesiology pg. 35-46 [Learner Objectives]: 7D23: Demonstrate competence in implementing selected components of interventions identified in the plan of care established by the physical therapist. Interventions include: H: Therapeutic Exercise 7D24: Demonstrate competence in performing components of data collection skills essential for carrying out the plan of care by administering appropriate tests and measures (before, during and after interventions) for the following areas: H: Muscle Performance: measure muscle strength by manual muscle testing; observe the presence or absence of muscle mass; recognize normal and abnormal muscle length, and changes in muscle tone A1. Describe the functions of the muscular system. A2. Describe the three different types of muscle tissue. A3. Describe the composition of skeletal muscle. A4. Describe the microanatomy/composition of a muscle fiber. **[Functions of the Muscular System]** - - - - **[Three Types of Muscle Tissue:]** 1. 2. 3. a. - - b. - - - - - - **[Myofascial Unit:]** - **[Microanatomy of a Muscle Fiber:]** - - - http://www.mcatzone.com/uploads/gloss/sarcolemma.jpg - - - - - - - - - - **[Sliding Filament Mechanism]** - - - - - - - - - - **[Nervous System Control of Muscle Contraction]** - - http://www.classontheweb.com/demo/cbse/classontheweb/getsetgo/cbse/clas10/science/Chap10Sci07NCERT1\_files/NeuromuscularJunction.jpg - - - - - - - - \*YouTube - Sliding Filament Theory of Muscle Contraction Explained **[Motor Unit]** - - - - **[All of None Response Law]**: When a muscle fiber receives an electrical impulse, the muscle fiber contracts completely, or 100%. If no electrical impulse is received, the muscle fiber stays relaxed, or at 0%. - - **[Red and White Muscle Fibers]** 1. - - - 2. - - - Motor units within a muscle are homogeneous, meaning they have all red or all white fibers. Small motor units are composed of red slow-twitch fibers. Large motor units are composed of white fast-twitch fibers. Every muscle in the body contains a combination of red and white muscle fibers. The ratio of red and white fibers is genetically determined. Red fibers are better for endurance and white fibers are better for power.
