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Anatomy Review

Anatomy Review. Cat Muscles Written by Eduardo Alvarez & Roberto Martinez Students of Professor Gonsalves’ LACC Anatomy 1 Class. MUSCLES OF MASTICATION. Masseter. Origin: Zygomatic Bone Insertion: Mandible Action: Elevates Mandible. Temporalis. Origin: Temporal Bone Insertion:

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Anatomy Review

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  1. Anatomy Review Cat Muscles Written by Eduardo Alvarez & Roberto Martinez Students of Professor Gonsalves’ LACC Anatomy 1 Class

  2. MUSCLES OF MASTICATION

  3. Masseter • Origin: • Zygomatic Bone • Insertion: • Mandible • Action: • Elevates Mandible

  4. Temporalis • Origin: • Temporal Bone • Insertion: • Mandible • Action: • Elevates and Retracts Mandible

  5. Digastric • Origin: • Occipital Bone and Mastoid Process • Insertion: • Mandible • Action: • Depresses Lower Jaw

  6. Mylohyoid • Origin: • Mandible • Insertion: • Hyoid Bone • Action: • Raises Floor of Mouth and Pulls Hyoid Forward

  7. NECK MUSCLES THAT MOVE THE HEAD

  8. Sternomastoid (only in cats) • Origin: • Sternum • Insertion: • Mastoid Process • Action: • Turns and Depresses Head

  9. Cleido-mastoid • Origin: • Clavicle • Insertion: • Mastoid Process • Action: • Pulls Head Laterally and Pulls Clavicle Craniad

  10. MUSCLES OF HYOID, LAYRNX, & TONGUE

  11. Sternohyoid • Origin: • First Rib (Intercostal) • Insertion: • Hyoid Bone • Action: • Pulls Hyoid Caudally, Raises Ribs and Sternum

  12. Sternothyroid • Origin: • First Rib (Intercostal) • Insertion: • Larynx • Action: • Pulls Larynx Caudal (down)

  13. Thyrohyoid • Origin: • Thyroid Cartilage of Larynx • Insertion: • Hyoid Bone • Action: • Raises Larynx

  14. Geniohyoid(deep to Mylohyoid) • Origin: • Mandible • Insertion: • Hyoid Bone • Action: • Pulls Hyoid Craniad (up)

  15. MUSCLES THAT ATTACH PECTORAL APPENDAGES TO THE VERTEBRAL COLUMN

  16. Trapezius • Origin: • Occipital Bone and Cervical and Thoracic Vertebrae • Insertion: • Scapula and clavicle • Action: • Raises Clavicle, Adducts, Elevates and Depresses Scapula

  17. Latissimus Dorsi • Origin: • Thoracic and Lumbar Vertebrae • Insertion: • Humerus • Action: • Pulls Arm Dorsad (back) and Caudad (down)

  18. RhomboideusCapitis • Origin: • Lamboidal Ridge • Insertion: • Scapula • Action: • Pulls Scapula Craniad (up)

  19. RhomboideusMinor • Origin: • Thoracic Vertebrae • Insertion: • Scapula • Action: • Pulls scapula dorsally and medially capitis

  20. RhomboideusMajor • Origin: • Thoracic Vertebrae • Insertion: • Scapula • Action: • Pulls Scapula Dorsally (toward back) and Medially (towards midline) capitis

  21. LevatorScapulaeVentralis • Origin: • Occipital Bone and Atlas (C1) • Insertion: • Scapula • Action: • Pulls Scapula Craniad (toward head)

  22. MUSCLES THAT ATTACH PECTORAL APPENDAGES TO VENTRAL AND BODY WALL

  23. Pectoante-brachialis(cat only) • Origin: • Sternum • Insertion: • Forearm (proximal end) • Action: • Adducts Arm

  24. Pectoralis Major • Origin: • Sternum • Insertion: • Humerus • Action: • Adducts Arm

  25. Pectoralis Minor • Origin: • Sternum • Insertion: • Humerus • Action: • Adducts Arm

  26. Xiphi-humeralis(cat only) • Origin: • Xiphoid Process • Insertion: • Humerus • Action: • Adducts Arm

  27. SerratusVentralis • Origin: • First 10 Ribs • Insertion: • Scapula • Action: • Pulls Scapula Forward & Depresses Scapula

  28. MUSCLES OF THE SHOULDER

  29. (Deltoid)Clavodeltoid • Origin: • Clavicle and Clavotrapezius muscle • Insertion: • Humerus • Action: • Flexes Forearm

  30. (Deltoid)Acromio-deltoid • Origin: • Scapula • Insertion: • Humerus • Action: • Flexes Humerus and Rotates it Outward

  31. (Deltoid)Spinodeltoid • Origin: • Scapula • Insertion: • Humerus • Action: • Flexes Humerus and Rotates it Outward

  32. Supraspinatus • Origin: • Scapula • Insertion: • Humerus • Action: • Extends Humerus

  33. Infra-spinatus Rhomboideus major • Origin: • Scapula • Insertion: • Humerus • Action: • Rotates Humerus Outward Teres major

  34. Teres Major Rhomboideus major • Origin: • Scapula • Insertion: • Humerus • Action: • Flexes forearm and Rotates it inward

  35. Sub-Scapularis • Origin: • Scapula • Insertion: • Humerus • Action: • Pulls Humerus Medially

  36. MUSCLES OF UPPER ARM

  37. Triceps Brachii Lateral head Medial head • Origin: • Long Head: Scapula Lateral Head and Medial Head: Humerus • Insertion: • Ulna • Action: • Extends Forearm Long head

  38. Biceps Brachii • Origin: • Scapula • Insertion: • Radius • Action: • Flexes and Supinates Forearm

  39. Brachialis • Origin: • Humerus • Insertion: • Ulna • Action: • Flexes Forearm

  40. MUSCLES OF THE TRUNK Thoracic Region

  41. Origin: Caudal border of one rib Insertion: Crainal border of rib caudad Action: Raises Rib (Inhalation) Origin: Cranial border of one rib Insertion: Caudal border of rib above Action: Draw Adjacent Ribs Together and Lower Rib External Intercostals Internal Intercostals

  42. Extenal Abdominal Oblique • Origin: • Last nine Ribs • Insertion: • Linea Alba from Sternum to Pubis • Action: • Compresses Abdomen

  43. Transversus Abdominis • Origin: • Costal cartilage of False Ribs, Lumbar Vertabrae, and Ilium • Insertion: • Linea Alba • Action: • Compresses the Abdomen

  44. Extensor dorsi communis • Muscle Groups: • Spinalis • Longissimus • Iliocostalis • Action: • Extends Vertebral Column

  45. MUSCLES OF THE HIP REGION

  46. Tensor fascia latae • Origin: • Ilium • Insertion: • Patella and Tibia • Action: • Extends Thigh, Aids in Abduction and Rotation

  47. Caudo-femoralis • Origin: • 2 and 3 Caudal Vertebrae • Insertion: • Patella • Action: • Abducts Thigh and Extends Shank

  48. Gluteus Maximus • Origin: • Sacral and Caudal Vertebrae • Insertion: • Femur • Action: • Abducts Thigh

  49. Gluteus Medius • Origin: • Sacral and Caudal Vertebrae & Ilium • Insertion: • Femur • Action: • Abducts Thigh

  50. MUSCLES OF THE THIGH Dorsal Femoral Group (Flexors)

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