Stay Apparatus of the Horse

Forelimbs

Horses have the ability to relax in the standing position with little fatigue due to a ‘ stay mechanism’ present in both the fore – and hindlimbs. This apparatus consists of a series of muscles and ligaments that can ‘lock’ the main joints into position.

  1. Cervical Part of Rhomboid Muscle
  2. Cervical Part of Ventral Serrate Muscle
  3. Thoracic Part of Ventral Serrate Muscle
  4. Supraspinatus Muscle
  5. Biceps Brachii Muscle
  6. Long Head of Triceps Muscle
  7. Lateral Head of Triceps Muscle
  8. Medial Head of Triceps Muscle<
  9. Lacertus Fibrosus
  10. Radial Carpal Extensor Muscle
  11. Conjoint Tendon of Radial Carpal Extensor Muscle & Lacertus Fibrosus
  12. Superficial Digital Flexor Muscle
  13. Tendon of Superficial Digital Flexor Muscle
  14. Radial Check Ligament
  15. Deep Digital Flexor Muscle
  16. Tendon of Deep Digital Flexor Muscle
  17. Carpal Check Ligament
  18. Suspensory Ligament
  19. Distal Sesamoidean Ligament
  20. Tendon of Common Digital Extensor
  21. Extensor Branch of Suspensory Ligament Attaching to Common Digital Extensor Tendon.

Hindlimbs

12. Superficial Digital Flexor Muscle

13. Tendon of Sperficial Digital Flexor Muscle

15. Deep Digital Flexor Muscle

16. Tendon of Deep Digital Flexor Muscle

18. Suspensory Ligament

19. Distal Sesamoidean Ligament

22. Gluteal Muscles

23. Tensor Muscle of Lateral Fascia of Thigh

24. Rectus Femoris Muscle

25. Vastus Muscles

26. Biceps Femoris Muscle 9 Most Important of the Hamstring Group)

27. Semitendinous Muscle

28. Accessory or Tarsal Tendon

29. Straight Patellar Ligament

30. Peroneus Tertius Muscle

31. Gastrocnemius Muscle

32. Tarsal Check Ligament

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