Ch9 Le1
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The document discusses the muscular system and muscle tissue. It provides details about Moebius syndrome, which involves the absence of cranial nerves causing facial muscle issues. It also describes treatments for this condition. The three main types of muscle tissue are defined as skeletal muscle, cardiac muscle, and smooth muscle. Skeletal muscle tissue structure and components like fascia, tendons, and the layers of connective tissue surrounding fibers are examined.
Ch9 Le1
- 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