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Ch9 Le1

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  • Transcript

    • 1. Chapter 9: Muscular System Lecture #1
    • 2. What is Moebius syndrome?
      • Absence of the sixth and seventh cranial nerves which carry impulses from the brain to the muscles of the face
      • Symptoms?
      difficulty: sucking swallowing squinting eyes moving tongue smiling
    • 3. What treatment did Chelsey Thomas receive?
      • Underwent two ‘smile’ surgeries
      • At 7yo, transplant of nerve and muscle tissue from legs to either side of her mouth
    • 4. 3 Types of Muscle Tissue
      • Skeletal Muscle Tissue
      • Cardiac Muscle Tissue
      • Smooth Muscle Tissue
    • 5. Skeletal Muscle Tissue
      • Tissues you’ll find in skeletal muscle
      Skeletal Muscle Tissue Nervous Tissue Blood Connective Tissue dense c.t. blood vessels nerves muscle fibers with motor neurons
    • 6. Structure of a Skeletal Muscle
      • Connective Tissue Coverings
      Fascia: -separates individual muscle -holds muscle in position -dense c.t. -projects beyond muscle to form tendon
    • 7. Structure of a Skeletal Muscle
      • Connective Tissue Coverings
      Tendon: -may intertwine with periosteum
    • 8. Structure of a Skeletal Muscle
      • Connective Tissue Coverings
      Tendons : muscle to bone attachment Aponeuroses : fibrous sheets attaching to bone or to other muscle
    • 9. Tendinitis & Tenosynovitis
      • Green box on p. 286
        • What is it & what causes it?
        • Where is it most commonly found?
      inflamed or swolen tendon due to injury or repeated stress shoulder, elbow, hip, knee movement of wrist, hand, thigh, foot
    • 10. Structure of a Skeletal Muscle
      • Epimysium
      • Perimysium
      • Endomysium
      Myofibril muscle fascicle Muscle fiber
    • 11. C.T. Functions
      • E
      • P
      • E
        • Functions: allows parts to move somewhat independently
        • Also, blood vessels and nerves pass through these layers
      erimysium ndo mysium pi mysium
    • 12. Compartmentment Syndrome
      • Green box on p. 286
        • What is it?
        • What is the treatment?
      pressure on a muscle enclosed in connective tissue due to a hemmorage surgery to relieve pressure
    • 13. Fascia layers (c.t. layers)
      • Fascia is interconnected throughout body to
        • Deep fascia: surrounds muscle
        • Subcutaneous fascia: just beneath the skin
        • Subserous fascia: c.t. layer of serous memb over organs and in body cavities
    • 14. Structure of a Skeletal Muscle
      • C.T. coverings
      • Skeletal Muscle Fibers
      2. Aponeurosis & Tendons 1. Fascia 3. Epimysium Perimysium Endomysium 4. fascicles
    • 15. Structure of a Skeletal Muscle
      • Skeletal Muscle Fibers
      A B C D
    • 16. Structure of a Skeletal Muscle
      • Skeletal Muscle Fibers
    • 17. Structure of a Skeletal Muscle
      • A Single Muscle Cell = Muscle ________
      • Forms from many undifferentiated cells that fuse during development
      • CHARACTERISTICS:
        • MULTINUCLEATED
        • THIN
        • ELONGATED CYLINDER WITH ROUNDED ENDS
      fiber
    • 18. Structure of a Skeletal Muscle A Muscle Fiber
    • 19.
      • Sarcomeres connected end-to-end make up ______________
      • Functional unit of muscle contraction = _______________
      • Striation pattern
      myofibrils sarcomere I-Bands A-Bands

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