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Ch 11, Muscles of the BodyPart 1: The Axial Musculature   Consists of the        Head and Neck        Spine        Rib...
Muscle Arrangements
Some Nomenclature Aids Location, e.g., intercostal                                            Page 274 Shape, e.g. delto...
Superficial muscles           Fig 11-7 a and b
The Head (and face) orbicularis oculi orbicularis oris risorius platysma
Muscles of Mastication (chewing)MasseterTemporalisBuccinator
Tongue (glosso) and related muscles   Genioglossus        Inferior aspect of         tongue Styloglossus Hyoglossus   ...
Eye (Ch 16)•Rectus muscles:    •Medial and Lateral    •Superior and Inferior• Oblique muscles    •Superior and Inferior   ...
The Neck•Digastric•Sternocleidomastoid (twoheads, or origins)•Suprahyoid Group•Infrahyoid Group
The SpineTrapeziusDeltoidSupraspinatusInfraspinatusLatissimus dorsi
More Spine        1.   Pectoantebrachialis        2.   Pectoralis major        3.   Pectoralis minor        4.   Xiphihume...
The Neck & Spine: For posture•erector spinaegroup:    •Longissimus    •Iliocostalis    •Spinalis
Respiration•Diaphragm    •Dome-shaped    •Contraction causes    inspiration•Intercostals    •External - for    inspiration...
The Abdominal GroupAbdominal wall:•Rectus abdominis     •Tendinous intersections     (inscriptions, insertions)          •...
The Abdominal Group
Pelvic Floor•Pelvic Diaphragm    •Levator ani    •Coccygeus•External UrethralSphincter•External AnalSphincter             ...
Pelvic Floor, deep
Pelvic Floor, superficial
Chapter11 musclespart1marieb
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Chapter11 musclespart1marieb

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Chapter11 musclespart1marieb

  1. 1. Ch 11, Muscles of the BodyPart 1: The Axial Musculature Consists of the  Head and Neck  Spine  Ribs Know the Terms:  Origin, Insertion, Action  Agonist (prime mover) and Antagonist  Synergist Developed by John Gallagher, MS, DVM
  2. 2. Muscle Arrangements
  3. 3. Some Nomenclature Aids Location, e.g., intercostal Page 274 Shape, e.g. deltoid Size, e.g., gluteus maximus Direction of fibers, e.g., rectus, oblique Location of origin and/or insertion, e.g., sternocleidomastoid  Number of origins, e.g., biceps brachii Action (flexor, extensor, etc.) Superficial, big, important
  4. 4. Superficial muscles Fig 11-7 a and b
  5. 5. The Head (and face) orbicularis oculi orbicularis oris risorius platysma
  6. 6. Muscles of Mastication (chewing)MasseterTemporalisBuccinator
  7. 7. Tongue (glosso) and related muscles Genioglossus  Inferior aspect of tongue Styloglossus Hyoglossus Genio- = chin Glosso = tongue
  8. 8. Eye (Ch 16)•Rectus muscles: •Medial and Lateral •Superior and Inferior• Oblique muscles •Superior and Inferior •Note the trochlea•Levator palpebrae superioris Fig. 16-6We’ll see these again, in Special Senses
  9. 9. The Neck•Digastric•Sternocleidomastoid (twoheads, or origins)•Suprahyoid Group•Infrahyoid Group
  10. 10. The SpineTrapeziusDeltoidSupraspinatusInfraspinatusLatissimus dorsi
  11. 11. More Spine 1. Pectoantebrachialis 2. Pectoralis major 3. Pectoralis minor 4. Xiphihumeralis 5. External Oblique 6. Latissimus dorsi Flap for breast 7. Epitrochlearis 8. Clavobrachialis reconstruction
  12. 12. The Neck & Spine: For posture•erector spinaegroup: •Longissimus •Iliocostalis •Spinalis
  13. 13. Respiration•Diaphragm •Dome-shaped •Contraction causes inspiration•Intercostals •External - for inspiration •Internal – for expiration
  14. 14. The Abdominal GroupAbdominal wall:•Rectus abdominis •Tendinous intersections (inscriptions, insertions) •The “six pack”•Int. and ext. obliques•Transversus abdominis•Linea alba•Inguinal rings
  15. 15. The Abdominal Group
  16. 16. Pelvic Floor•Pelvic Diaphragm •Levator ani •Coccygeus•External UrethralSphincter•External AnalSphincter Fig 11-15
  17. 17. Pelvic Floor, deep
  18. 18. Pelvic Floor, superficial

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