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Introduction to Muscles

Introduction to Muscles. Origin: Attachment of a muscle tendon to the stationary bone. Insertion: Attachment of the other muscle tendon to the movable bone. Action: The movement that occurs at the joint due to muscle contraction. Origin and Insertion. Belly.

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Introduction to Muscles

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  1. Introduction to Muscles Origin: Attachment of a muscle tendon to the stationary bone. Insertion: Attachment of the other muscle tendon to the movable bone. Action: The movement that occurs at the joint due to muscle contraction.

  2. Origin and Insertion

  3. Belly

  4. Characteristics Used to Name Muscles • Direction of Fibers • Size of Muscle • Shape of Muscle • Action of Muscles • Number of Origins of Muscle • Location of Muscle • Origin and Insertion of Muscle

  5. Characteristics Used to Name Muscles • Direction of Muscle Fibers • Rectus: Parallel to midline • Transverse: Perpendicular to midline • Oblique: Diagonal to midline

  6. Rectus: Parallel to midline

  7. Transverse: Perpendicular to midline

  8. Oblique: Diagonal to midline

  9. Characteristics Used to Name Muscles • Size of the Muscle: • Maximus: Largest muscle in a group • Minimus: Smallest muscle in a group • Longus: Longest muscle in a group • Brevis: Shortest muscle in a group • Latissimus: Widest muscle in a group • Magnus: Largest muscle in a group • Major: Largest muscle in a group • Minor: Smallest muscle in a group • Vastus: Great or large muscle

  10. Maximus: Largest muscle in a group

  11. Minimus: Smallest muscle in a group

  12. Longus: Longest muscle in a group

  13. Brevis: Shortest muscle in a group

  14. Latissimus: Widest muscle in a group

  15. Major: Largest muscle in a group

  16. Minor: Smallest muscle in a group

  17. Vastus: Great or large muscle

  18. Characteristics Used to Name Muscles • Shape of Muscle • Deltoid: Triangular shaped • Trapezius: Trapezoid shaped • Serratus: Saw-toothed muscle edge • Rhomboideus: Diamond shaped • Orbicularis: Circular shaped • Pectinate: Comblike shaped • Platys: Flat muscle • Quadratus: Square shaped • Gracilis: slender muscle

  19. Deltoid: Triangular shaped

  20. Trapezius: Trapezoid shaped

  21. Serratus: Saw-toothed muscle edge

  22. Rhomboideus: Diamond shaped

  23. Orbicularis: Circular shaped

  24. Pectinate: Comblike shaped

  25. Platys: Flat muscle

  26. Quadratus: Square shaped

  27. Gracilis: Slender muscle

  28. Characteristics Used to Name Muscles • Action of Muscles • Flexor: Decreases angle at joint • Extensor: Increases angle at joint • Abductor: Moves bone away from midline • Adductor: Moves bone toward midline • Levator: Produces superior movement • Depressor: Produces inferior movement • Supinator: Turns palm anteriorly • Pronator: Turns palm posteriorly • Sphincter: Decreases size of opening • Tensor: Makes a body part rigid • Rotator: Moves bone around an axis

  29. Flexor: Decreases angle at joint

  30. Extensor: Increases angle at joint

  31. Adductor: Moves bone toward midline

  32. Levator: Produces superior movement

  33. Depressor: Produces inferior movement

  34. Supinator: Turns palm anteriorly

  35. Pronator: Turns palm posteriorly

  36. Sphincter: Decreases size of opening

  37. Tensor: Makes a body part rigid

  38. Characteristics Used to Name Muscles • Number of Origins of Muscle • Biceps: Muscle with two origins • Triceps: Muscle with three origins • Quadriceps: Muscle with four origins

  39. Biceps: Muscle with two origins

  40. Triceps: Muscle with three origins

  41. Quadriceps: Muscle with four origins

  42. Location of Muscle

  43. Origin and Insertion of Muscle

  44. Origin and Insertion of Muscle

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