1 / 15

The Fetlock and Foot

The Fetlock and Foot. First Year Anatomy Nicholas Urbanek , BVMS, MRCVS. What is the Fetlock?. Fetlock  is the common name for the metacarpophalangeal  and  metatarsophalangeal joints (MCPJ and MTPJ) of the horses.

zagiri
Download Presentation

The Fetlock and Foot

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Fetlock and Foot First Year Anatomy Nicholas Urbanek, BVMS, MRCVS

  2. What is the Fetlock? • Fetlock is the common name for the metacarpophalangeal and metatarsophalangealjoints (MCPJ and MTPJ) of the horses. • It is formed by the junction of the third metacarpal (forelimb) or metatarsal (hindlimb) bones (cannon bones) proximally and the proximal phalanx (pastern bone) distally. • Paired proximal sesamoid bones articulate with the palmar or plantar distal surface of the third metacarpal or metatarsal bones and are rigidly fixed to the proximo-palmar /-plantar edge of the proximal phalanx.

  3. Common Views Lateral Lateral DMPLO DP DLPMO

  4. Lateral View • A: Third MC/MT bone • B: Proximal phalanx (P1) • 1: Sagittal ridge • 3: Palmarprocess of proximal phalanx • 4: Condyles of thirdmetacarpalbone • 5: Proximal sesamoidbones

  5. Dorso-palmer/-plantar (DP) • A: Third MC/MT bone • B: Proximal phalanx • C: Medial proximal sesamoidbone • D: Lateral proximal sesamoidbone • E: Metacarpo(tarso)-phalangeal joint • J: Depression for medialcollateral ligament attachment • 1: Sagittal ridge

  6. Obliques – A Review • The view is named for the projection of the beam. • Typically taken at 45 degree angles off the sagittal axis of the limb. • Markers must be in place, otherwise unable to distinguish medial from lateral side. • Dorsomedial-palmarolateral (plantar)oblique (DMPLO) • Dorsolateral-palmaromedial (plantar)oblique (DLPMO)

  7. Dorsal Lateral Medial Palmar/Pl DLPMO A: Third MC/MT bone B: Proximal phalanx C: Medial proximal sesamoid bone D: Lateral proximal sesamoid bone E: Metacarpo(tarso)-phalangeal joint 1: Sagittal ridge 3: Palmar process of proximal phalanx/Lateral palmar tubercle (eminence) 6: Medial condyle of third MC/MT bone DLPMO

  8. Dorsal Lateral Medial Palmar/Pl A: Third MC/MT bone B: Proximal phalanx C: Medial proximal sesamoid bone D: Lateral proximal sesamoid bone E: Metacarpo(tarso)-phalangeal joint 1: Sagittal ridge 2: Lateral condyle of third metacarpal/tarsal bone 3: Palmar process of proximal phalanx DMPLO DMPLO

  9. Fetlock Bulging  Forelimb vs Hindlimb • The MT isconvexatits distal aspect DP view - Hindlimb DP view - Forelimb The proximal sesamoidbones are higher The proximal sesamoidbones are more triangular

  10. Foot or Distal Limb • Composed of four bones • Proximal, middle, distal (first, second, and third) phalanx • Navicular bone • Multiple views obtained • Lateral • Dorsopalmar(plantar) view • Dorsoproximal-palmar(plantar)odistal oblique • “Upright Pedal” or “High coronary” • Palmar(plantar)oproximal-palmar(plantar)odistal • “Skyline Novicular” • Other oblique views • The foot should have no shoe, be trimmed, and sulci should be packed with Play-Doh • Marker always to the lateral side…can not tell laterality otherwise

  11. Lateral view A: Middle phalanx B: Third phalanx C: Navicular bone 1: Proximal interphalangeal joint 2: Distal interphalangeal joint 3: Extensor process 4: Dorsal surface 5: Palmar process

  12. A: Middle phalanx B: Distal phalanx C: Navicular bone 6: Proximal interphalangeal joint 7: Distal interphalangeal joint Dorsopalmar(plantar) view R 6 A 7 C B

  13. 2 5 5 B 6 7 Dorsoproximal-palmar(pl)odistal oblique view A A: Middle phalanx B: Third phalanx C: Navicular bone 1: Proximal interphalangeal joint 2: Distal interphalangeal joint 3: Extensor process 4: Dorsal surface 5: Palmar process 6: Vascular channel 7: Solar margin R “Upright pedal” “High coronary” Dorsoproximal-palmar(plantar)odistal oblique view

  14. Palmaro(plantar)oproximal-palmar(plantar)odistal oblique view “Skyline Novicular” C: Navicular bone 3: Articular surface 8: Palmar aspect of middle phalanx 9: Nutrient foramen 10: Sagittal ridge 11: Articulation between navicular bone and middle phalanx

More Related