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Origin and insertion of major muscles & fibre

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  • 1. Lloyd Dean Origin and Insertion of Major Muscles & Fibre Directions
  • 2. Aims
    • By the end of the lesson you should be able to:
    • List and label the major muscles of the body
    • State the origin and insertion of the major muscles
    • Describe the different types of muscle shapes and match to major muscles
    • Explain the actions of major muscles and exercises that can be used to work each.
  • 3. Origin and Insertion of Muscles
    • Triceps (Long head, Lateral head & Medial head)
    • Biceps (Biceps Brachii)
    • Origin
    • Long – Scapula
    • Lateral and Medial – Humerus
    • Insertion
    • Ulna
    • Origin
    • Scapula
    • Insertion
    • Radius and Ulna
  • 4. Origin and Insertion of Muscles
    • Obliques (Internal and External)
    • Abdominals (Transverse Abdominous, Rectus Abdominus)
    • Origin
    • Lowest Rib
    • Insertion
    • Illiac Crest
    • Origin
    • Illiac
    • Insertion
    • Transvers Abdominous – Linea alba (“White Line” collagen connective tissue)
    • Rectus Abdominous - Sternum
  • 5. Origin and Insertion of Muscles
    • Pectorals (Pectoralis Major)
    • Trapezius (Upper, Middle & Lower)
    • Origin
    • Clavicle
    • Sternum
    • Ribs
    • Insertion
    • Humerus
    • Origin
    • Upper – base of skull
    • Middle – Spinal ligaments
    • Lower - Vertebrae
    • Insertion
    • Clavicle
    • Scapula
  • 6. Origin and Insertion of Muscles
    • Deltoids (Anterior, Middle & Posterior)
    • Erector Spinae (Sacrospinatus)
    • Origin
    • Clavicle
    • Scapula
    • Insertion
    • Humerus
    • Origin
    • Ilium
    • Sacrum
    • Ribs
    • Insertion
    • Base of skull
    • Ribs
  • 7. Origin and Insertion of Muscles
    • Hamstrings (Biceps Femoris, Semitendinosus, Semimembranosus)
    • Quadriceps (Vastus Medialis, Vastus Intermedius, Vastis Lateralis & Rectus Femoris)
    • Origin
    • All Pelvis
    • Insertion
    • All Tibia
    • Origin
    • Rectus Femoris – Illiac
    • All Vastus’ - Femur
    • Insertion
    • All Patella
  • 8. Origin and Insertion of Muscles
    • Gastrocnemius
    • Gluteals (Minimus, Medius & Maximus)
    • Origin
    • Femur
    • Insertion
    • Achilles tendon
    • Origin
    • All pelvis
    • Insertion
    • All Femur
  • 9. Muscle Fibre Direction
    • Different muscles have varying shapes and sizes
    • Can be classified into 5 shapes;
      • Parallel
      • Convergent
      • Pennate
      • Fusiform
      • Circular
  • 10. Muscle Fibre Direction
    • Parallel
    • Convergent
    • Muscles that have fibres running parallel
    • Strap like
    • Not strong but have good endurance
    • Sternoclastamoid
    • Also know as triangular
    • Origin is wider that the insertion
    • Allows greater force production
    • Pectoralis Major
  • 11. Muscle Fibre Direction
    • Pennate
    • Large numbers of muscle fibre per unit
    • Strong, but tire easier
    • “ Feather” shaped
    • Further classified into;
      • Bipennate – Two rows of fibres facing opposite direction (Rectus Femoris)
      • Unipennate – Fibres are inserted in a diagonal direction onto tendon (Deep hand muscles)
      • Multipennate – Tendon branches into 3 (Deltoids)
  • 12. Muscle Fibre Direction
    • Circular
    • Fusiform
    • Circular shape
    • Orbicuslaris oris (Lips)
    • Spindle shaped
    • “ Belly” of muscle is wider than the origin and insertion
    • Biceps