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Muscles Test Pwr Pt

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May find this helpful to study the Head & Neck Anatomy Muscles!

Muscles Test Pwr Pt

  1. 1. Muscles TestHead & Neck Anatomy Dr. Shean Oct 21, 2011
  2. 2. Muscles of Facial Expression• Origin of most is on bones• Innervation of all from CN VII Facial – Exits skull via stylomastoid foramen
  3. 3. Sternocleidomastoid
  4. 4. Sternocleidomastoid
  5. 5. Sternocleidomastoid
  6. 6. Trapezius
  7. 7. Trapezius
  8. 8. Trapezius
  9. 9. Trapezius
  10. 10. Frontalis
  11. 11. Frontalis
  12. 12. OrbicularisOculi
  13. 13. OrbicularisOculi
  14. 14. Zygomaticus Major
  15. 15. Zygomaticus Major
  16. 16. Insertion of Zygomaticus Major• Origin: Zygomatic bone• Insertion: blends with muscles at the angle of the mouth• Action: Elevation of corner of mouth (smile)
  17. 17. Zygomaticus Minor
  18. 18. Origin of Zygomaticus Minor• Origin: Zygomatic Bone• Insertion: Blends with orbicularisoris muscle• Action: Elevation of upper lip, produce nasolabial furrow
  19. 19. LevatorAnguliOris
  20. 20. LevatorAnguliOris
  21. 21. Origin of LevatorAnguliOris• Origin: Maxilla• Insertion: Blends with muscles at angle of mouth.• Action: Elevation of angle of mouth (smile).
  22. 22. Risorius
  23. 23. Risorius
  24. 24. LevatorLabiiSuperioris LevatorLabiiSuperiorisalaequenasi
  25. 25. LevatorLabiiSuperioris
  26. 26. Origin LevatorLabiiSuperioris• Origin: Zygomatic bone, Maxilla• Insertion: Blends with muscles of upper lip• Action: Elevates upper lip (sneer)
  27. 27. LevatorLabiiSuperiorisalaequenasi
  28. 28. LevatorLabiiSuperiorisalaequenasi
  29. 29. Origin of LevatorLabiiSuperiorisalaequenasi• Origin: Maxilla• Insertion: Alar cartilage of nose, blends with muscles of upper lip• Action: Elevation of upper lip, dilation of nostril
  30. 30. OrbicularisOris
  31. 31. OrbicularisOris
  32. 32. Depressor AnguliOris
  33. 33. Depressor AnguliOris
  34. 34. Origin of Depressor AnguliOris• Origin: Mandible (body)• Insertion: Blends with muscles at angle of the mouth• Action: Depression of angle of the mouth (grimace)
  35. 35. Depressor LabiiInferioris
  36. 36. Depressor LabiiInferioris
  37. 37. Origin of Depressor LabiiInferioris• Origin: Mandible (body)• Insertion: Blends with muscles of lower lip• Action: Depression of lower lip (pout)
  38. 38. Mentalis
  39. 39. Origin of Mentalis• Origin: Mandible• Insertion: Skin of chin• Action: Wrinkles skin of chin, raises and protrudes upper lip
  40. 40. Buccinator
  41. 41. Buccinator
  42. 42. Origin of Buccinator• Origin: PterygomandicularRaphe, Maxilla (lateral aspect), Mandible (lateral body)• Insertion: Blends with muscles at angle of mouth• Action: Compression of cheek (inflating a balloon, playing a wind musical instrument)• Innervation: CN VII Facial Nerve
  43. 43. Platysma
  44. 44. Platysma
  45. 45. Insertion of Platysma• Origin: Fascia of Thorax & upper neck• Insertion: Mandible (lower border), skin & fascia of lower face, blends with muscles of lower lip & angle of mouth.• Action: Elevates & creases skin of neck (look of “horror”), depression of lower lip & angle of mouth
  46. 46. Muscles of Mastication• All work on TMJ• Mandibular movements = elevation/depression, protrusion/retraction, lateral deviation• All innervated by CN V (3rd branch) : Mandibular branch of the Trigeminal Nerve
  47. 47. Masseter
  48. 48. Origin of Masseter• Origin: Zygomatic Arch• Insertion: Mandible (External surface of Angle &Ramus)• Action: Elevation of Mandible (closing mouth)
  49. 49. Insertion of Massetter• Origin: Zygomatic Arch• Insertion: Mandible (External surface of Angle &Ramus)• Action: Elevation of Mandible (closing mouth)
  50. 50. Temporalis
  51. 51. Origin of Temporalis• Origin: Temporal Fossa• Insertion: Mandible (Coronoid process &Ramus)• Action: Elevation of Mandible (close mouth)
  52. 52. Insertion of Temporalis• Origin: Temporal Fossa• Insertion: Mandible (Coronoid process &Ramus)• Action: Elevation of Mandible (close mouth)
  53. 53. Medial Pterygoid
  54. 54. Origin of Medial Pterygoid• Origin: Sphenoid bone (lateral Pterygoid plate)• Insertion: Mandible (medial surface of angle &Ramus)• Action: Elevation of Mandible (closing mouth)
  55. 55. Origin of Medial Pterygoid• Origin: Sphenoid bone (lateral Pterygoid plate)• Insertion: Mandible (medial surface of angle &Ramus)• Action: Elevation of Mandible (closing mouth)
  56. 56. Origin of Medial Pterygoid• Origin: Sphenoid bone (lateral Pterygoid plate)• Insertion: Mandible (medial surface of angle &Ramus)• Action: Elevation of Mandible (closing mouth)
  57. 57. Insertion of Medial Pterygoid• Origin: Sphenoid bone (lateral Pterygoid plate)• Insertion: Mandible (medial surface of angle &Ramus)• Action: Elevation of Mandible (closing mouth)
  58. 58. Lateral Pterygoid
  59. 59. Origin of Lateral Pterygoid• Origin: Spehoid bone (Greater wing & lateral Pterygoid plate)• Insertion: Mandible (neck) &Articular disc of TMJ• Action: Protrusion of Mandible
  60. 60. Origin of Lateral Pterygoid• Origin: Spehoid bone (Greater wing & lateral Pterygoid plate)• Insertion: Mandible (neck) &Articular disc of TMJ• Action: Protrusion of Mandible
  61. 61. Insertion of Lateral Pterygoid• Origin: Spehoid bone (Greater wing & lateral Pterygoid plate)• Insertion: Mandible (neck) &Articular disc of TMJ• Action: Protrusion of Mandible
  62. 62. • REMEMBER THAT THE LATERAL PTERYGOID HAS 2 HEADS: SUPERIOR & INFERIOR HEAD (SEE NOTES)
  63. 63. Hyoid Muscles• Origins & insertions can be derived mostly from the names
  64. 64. Mylohyoid• SUPRAHYOID• Origin: Mandible (inner aspect of body)• Insertion: Hyoid bone• Action: Elevation of floor of mouth• Innervation: Mylohyoid nerve (branch of Mandibular branch of Trigeminal Nerve CN V 3rd branch)
  65. 65. Insertion of Mylohyoid• SUPRAHYOID• Origin: Mandible (inner aspect of body)• Insertion: Hyoid bone• Action: Elevation of floor of mouth• Innervation: Mylohyoid nerve (branch of Mandibular branch of Trigeminal Nerve CN V 3rd branch)
  66. 66. Digastric Muscle• SUPRAHYOID• Innervation Ant. Belly: Mylohyoid Nerve ( branch of Mandibular Branch of Trigeminal Nerve)• Innervation Posterior Belly: Facial Nerve CN VII
  67. 67. Stylohyoid• SUPRAHYOID• Innervation: Facial Nerve CN VII
  68. 68. Geniohyoid• SUPRAHYOID• Origin: Genial tubercles inside of mandible (mental region)
  69. 69. Sternohyoid
  70. 70. Omohyoid• Infrahyoid• Muscle has 2 bellies (superior & inferior) joined by intermediate tendon attached to clavicle by fascia• Innervation (EX CREDIT): Ventral Rami of C 1-3 spinal nerves (cervical nerves/plexus)
  71. 71. Omohyoid
  72. 72. Sternohyoid• Infrahyoid• Innervation (EX CRED): ventral rami C 1-3 (Cervical nerves/plexus)
  73. 73. Thyrohyoid• Infrahyoid• Innervation (EX CRED): Ventral Ramus of C1 Spinal Nerve (Cervical nerves/plexus)
  74. 74. Thryohyoid
  75. 75. Tongue Muscles• Origins & Insertions mostly obvious from names• ALL innervated by CN XII Hypoglossal Nerve• Intrinsic vs Extrinsic Tongue Muscles
  76. 76. Intrinsic Tongue Muscles• Longitudinal• Transverse• Vertical
  77. 77. Styloglossus
  78. 78. Genioglossus
  79. 79. Genioglossus
  80. 80. Hyoglossus
  81. 81. Stylopharyngeus• Innervation: Gossopharyngeal CN IX
  82. 82. Superior/Middle/Inferior Pharyngeal Constrictor• Innervation: Pharyngeal Plexus – VAGUS NERVE??? CN X ???• Action: Produce a wave of contraction (peristalsis) during swallowing• Origin: – PterygomandibularRaphe (Sup.) – Hyoid bone (Mid.) – Thyroid &Cricoid cartilages of Larynx (Inf.)• Insertion: Post. Midline Raphe, Base of skull (sup. Constrictor)
  83. 83. Palatoglossus• Action: Elevates & Arches tongue, depressing soft palate toward tongue• If you found a good pic besides one out of the book (don’t have a scanner) then feel free to share! • OR Label this pic right here, I’m not sure which part it is.
  84. 84. Palatopharyngeus• Action: Moves palate posteroinferiorly& posterior pharyngeal wall anterosuperiorly
  85. 85. Levatorvelipalatini• Raies soft palate to contact the psoterior pharyngeal wall
  86. 86. Tensor velipalatini• Tenses & slightly lowers soft palate

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