muscle system
DESCRIPTION
Created for the Unit of Competence: Confirm Physical Health Status as part of the Certificate IV in Massage TherapyTRANSCRIPT
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The muscular systemThe muscular system
Content by Megan McDonald
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Mens gymnastics
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The muscular systemThe muscular system
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Muscle tissueMuscle tissueSmoothCardiacSkeletal
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Smooth muscle tissueSmooth muscle tissue
Image CC courtesy of @akay on Flickr http://www.flickr.com/photos/akay/244990069/
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Smooth muscle tissueSmooth muscle tissueNon striatedInvoluntaryWalls of hollow organs i.e. stomachWalls of tubes and passage ways i.e.
bronchioles, blood vessels, oesaphagus
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Cardiac muscle tissueCardiac muscle tissue
Images CC courtesy of @akay on Flickr http://www.flickr.com/photos/akay/
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Cardiac muscle tissueCardiac muscle tissueStriatedInvoluntaryFit together with tight junctions
that promote fast conduction of electrical signals.
Heart
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Skeletal muscle tissueSkeletal muscle tissueStriatedVoluntaryAttached to bone via tendons,
fascia or skin.
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Skeletal muscle functionSkeletal muscle functionProduce heatProduce movementMaintain body postureAssists in joint stability
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EndomysiumEndomysiumConnective tissue surrounding
each muscle fibre.
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PerimysiumPerimysiumMembrane surrounding each
fascicle.Fascicle – bundle of muscle
fibres.
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EpimysiumEpimysiumTough connective tissue Surrounds entire muscle.Extends to become tendons.
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FasciaFasciaOuter fibrous sheath Encloses a muscleSeparates muscles into
compartments.
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ExcitationExcitationThe ability to receive and
respond to stimulus
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ExcitationExcitationMotor nerves stimulate the
muscle cell at the Neuromuscular Junction
Neurotransmitter releases from motor nerve
An electrical impulses spreads along sarcolemma
Muscle contracts.
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ContractionContractionThe ability to shorten when
stimulated.
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ContractionContractionEach 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.
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Actin and Myosin.Actin and Myosin.Actin – thin and lightMyosin – thick and darkArranged in bands that slide past
each other.Calcium and Adenosine
Triphosphate are required.
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Sliding Filament TheorySliding Filament Theory
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Sliding filament theory 2Sliding filament theory 2
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AttachmentsAttachmentsEach skeletal muscle has 2
attachmentsOrigin – Proximal AttachmentInsertion – Distal Attachment
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When a muscle contracts one attachment moves toward another.
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Distal to proximal – concentric contraction
Proximal to distal – eccentric contraction.
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Prime MoverAssistant moverNeutraliserStabiliser
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Activity 6.2Activity 6.2Purple workbook.Label the diagram.
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Activity 6.3Activity 6.3Marieb workbook chapter 6Qu 1. p.103Qu. 14 p. 110Qu. 15 p. 115
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Soft tissue injuriesSoft tissue injuries
Grade I/MildFew ligaments tornStability maintained.
Ligament Sprains 1.
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Soft tissue injuriesSoft tissue injuries
Grade II/moderate sprainPartial ruptureIncreased laxityNo gross instability
Ligament Sprains 2.
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Soft tissue injuriesSoft tissue injuries
Grade III/severe sprainComplete ruptureGross instability
Ligament Sprains 3.
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Soft tissue injuriesSoft tissue injuries
Grade I/mild strainFew muscle fibres tornMinimal loss of strength Minimal pain on muscle
contraction
Muscle Strains 1.
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Soft tissue injuriesSoft tissue injuries
Grade II/moderate strainAbout half of muscle fibres tornSignificant loss of strength and
functionModerate to severe pain on
isometric contraction
Muscle Strains 2.
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Soft tissue injuriesSoft tissue injuries
Grade III/severe strainComplete tear of muscleSignificant weakness Significant loss of functionMinimum to no pain on isometric
contraction
Muscle Strains 3.
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Homework!Homework!Muscle chartQuiz
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Gymnastique OlympicGymnastique Olympic
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