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Muscle System
 

Muscle System

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Created for the Unit of Competence: Confirm Physical Health Status as part of the Certificate IV in Massage Therapy

Created for the Unit of Competence: Confirm Physical Health Status as part of the Certificate IV in Massage Therapy

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    Muscle System Muscle System Presentation Transcript

    • The muscular system Content by Megan McDonald
    • Mens gymnastics
    • The muscular system
    • Muscle tissue
      • Smooth
      • Cardiac
      • Skeletal
    • Smooth muscle tissue Image CC courtesy of @akay on Flickr http://www.flickr.com/photos/akay/244990069/
    • Smooth muscle tissue
      • Non striated
      • Involuntary
      • Walls of hollow organs i.e. stomach
      • Walls of tubes and passage ways i.e. bronchioles, blood vessels, oesaphagus
    • Cardiac muscle tissue Images CC courtesy of @akay on Flickr http://www.flickr.com/photos/akay/
    • Cardiac muscle tissue
      • Striated
      • Involuntary
      • Fit together with tight junctions that promote fast conduction of electrical signals.
      • Heart
    • Skeletal muscle tissue
      • Striated
      • Voluntary
      • Attached to bone via tendons, fascia or skin.
    • Skeletal muscle function
      • Produce heat
      • Produce movement
      • Maintain body posture
      • Assists in joint stability
    • Endomysium
      • Connective tissue surrounding each muscle fibre.
    • Perimysium
      • Membrane surrounding each fascicle.
      • Fascicle – bundle of muscle fibres.
    • Epimysium
      • Tough connective tissue
      • Surrounds entire muscle.
      • Extends to become tendons.
    • Fascia
      • Outer fibrous sheath
      • Encloses a muscle
      • Separates muscles into compartments.
    •  
    • Excitation
      • The ability to receive and respond to stimulus
    • Excitation
      • Motor nerves stimulate the muscle cell at the Neuromuscular Junction
      • Neurotransmitter releases from motor nerve
      • An electrical impulses spreads along sarcolemma
      • Muscle contracts.
    • Contraction
      • The ability to shorten when stimulated.
    • Contraction
      • Each muscle fibre contains myofibrils.
      • Myofibrils made up of sarcomeres.
      • Sarcomeres are formed by two protein filaments that contract and shorten.
      • The protein filaments are Actin and Myosin.
    • Actin and Myosin.
      • Actin – thin and light
      • Myosin – thick and dark
      • Arranged in bands that slide past each other.
      • Calcium and Adenosine Triphosphate are required.
    • Sliding Filament Theory
    • Sliding filament theory 2
    • Attachments
      • Each skeletal muscle has 2 attachments
      • Origin – Proximal Attachment
      • Insertion – Distal Attachment
      • When a muscle contracts one attachment moves toward another.
      • Distal to proximal – concentric contraction
      • Proximal to distal – eccentric contraction.
      • Prime Mover
      • Assistant mover
      • Neutraliser
      • Stabiliser
    • Activity 6.2
      • Purple workbook.
      • Label the diagram.
    • Activity 6.3
      • Marieb workbook chapter 6
      • Qu 1. p.103
      • Qu. 14 p. 110
      • Qu. 15 p. 115
    • Soft tissue injuries
      • Grade I/Mild
      • Few ligaments torn
      • Stability maintained.
      Ligament Sprains 1.
    • Soft tissue injuries
      • Grade II/moderate sprain
      • Partial rupture
      • Increased laxity
      • No gross instability
      Ligament Sprains 2.
    • Soft tissue injuries
      • Grade III/severe sprain
      • Complete rupture
      • Gross instability
      Ligament Sprains 3.
    • Soft tissue injuries
      • Grade I/mild strain
      • Few muscle fibres torn
      • Minimal loss of strength
      • Minimal pain on muscle contraction
      Muscle Strains 1.
    • Soft tissue injuries
      • Grade II/moderate strain
      • About half of muscle fibres torn
      • Significant loss of strength and function
      • Moderate to severe pain on isometric contraction
      Muscle Strains 2.
    • Soft tissue injuries
      • Grade III/severe strain
      • Complete tear of muscle
      • Significant weakness
      • Significant loss of function
      • Minimum to no pain on isometric contraction
      Muscle Strains 3.
    • Homework!
      • Muscle chart
      • Quiz
    • Gymnastique Olympic
    •