5- Equine Distal Limb Structures Flashcards
As far as extensor tendons, how is the thoracic limb different from the pelvic limb?
Front limb: Common digital extensor tendon and lateral digital extensor tendons are separate
Hind limb: Long digital tendon and lateral digital tendon merge
Where does the SDF insert?
Flexor surfaces of proximal phalanx and middle phalanx
Where does DDF insert?
On flexor surface of distal phalanx
Where does the digital flexor tendon sheath begin and end in the distal limb?
Begins: Distal 1/3 of cannon (metacarpal III)
Ends: Within hoof near navicular bone
What is scutum?
Fibrous cartilage and ligament provides gliding surface for flexor tendons
What is 3 & 4?
3) Superficial digital flexor tendon
4) Deep digital flexor tendon
The oval structure to the right is the flexor manica
True or false: The suspensory apparatus flexes joints in the distal limb
FALSE, it is a passive structure
Label the diagram of the suspensory apparatus
Blue: Proximal
Purple: Mid-body
Yellow: Branches
Green: extensor branches
Orange: Distal sesamoidean ligaments
Label the diagram
1) Suspensory ligament
2) Intersesamoidean ligament and proximal scutum **
3) Oblique sesamoidean ligaments
4) Straight sesamoidean ligament
5) Middle scutum **
6) Distal scutum
For each limb, structure or structures are ruptured
SDF tendon cut- fetlock drops
SDF tendon and DDF tendon cut- fetlock drops and toe up
SDF tendon, DDF tendon, and suspensory ligament cut- fetlock collapses and toe up
Label the diagram of the annular ligaments
Palmar annular ligaments
Proximal digital annular ligament
Distal digital annular ligament
Which ligament?
Ligament of ergot: not functionally important, but palpable
What is ergot?
Keratinized remnant of palmar pad
