*Horse: Digital Skeleton Osteology (Exam 1) Flashcards
What structures attach to the head of MC3?
collateral ligaments of fetlock joint
There is/are ___ proximal sesamoid bone(s). What are the 5 structures on each of them?
2
1. flexor (axial) surface
2. interosseus (abaxial) surface
3. basal (distal) surface
4. articular surface
5. palmar/plantar border
What 2 structures attach to the flexor (axial) surface of the proximal sesamoid bone?
palmar/plantar ligament
proximal scutum
The interosseus (abaxial) surface of the proximal sesamoid bone is the main attachment for ___________.
interosseus medius (suspensory ligament)
The basal (distal) surface of the proximal sesamoid bone provides the proximal attachment for what 4 structures?
- straight sesamoid ligament
- oblique sesamoid ligament
- cruciate sesamoid ligament
- short sesamoid ligament
What does the articular surface of the proximal sesamoid bone articulate with?
MC3 and MT3
What 2 things attach to the palmar/plantar border of the proximal sesamoid bone?
- palmar/plantar annular ligament
- collateral sesamoid ligament
What are the 5 significant structures on the proximal phalanx?
- triangular area on proximal mid-dorsal surface
- palmar/plantar margin of proximal articular surface
- triangular rough area on palmar/plantar surface
- proximal collateral tubercles
- distal collateral tubercles
What two structures insert on the triangular area of the proximal mid-dorsal surface of the proximal phalanx?
- lateral digital extensor tendon
- partial insertion of common digital extensory tendon
the palmar/plantar margin of the proximal articular surface of the proximal phalanx is the distal attachment of what structures?
short sesamoid ligaments
Proximally, the triangular rough area on the palmar/plantar surface of the proximal phalanx is the distal attachment for __________. Distally, it is the distal attachment for ________ and the proximal attachment of __________.
cruciate sesamoid ligaments
oblique sesamoid ligaments
palmar/plantar ligaments of pastern joint
Proximal collateral tubercles of the proximal phalanx are distal attachments for _________ and __________. It is the proximal attachment for ________.
collateral ligaments of fetlock joint
collateral sesamoid ligaments
proximal digital annular ligament
Distal collateral tubercles on the proximal phalanx is the distal attachment for _______ and the proximal attachment for ____________.
proximal digital annular ligament
collateral ligaments of pastern joint
Transverse flattened area on proximal palmar/plantar border of middle phalanx is attachment of ________ which provides distal attachment for _________ and _______.
middle scutum
straight sesamoid ligament
palmar/plantar ligaments of pastern joint
The proximal collateral tubercles on the middle phalanx is the distal attachment for ___________ and partial insertion of _________.
collateral ligaments of pastern joint
superficial digital flexor tendon
Depressions on each side of distal end of middle phalanx is proximal attachments for what?
collateral ligaments of coffin joint
What is the “coffin bone”?
distal phalanx (horse)
Extensor process of distal phalanx where ____________ inserts in the thoracic limb or __________ in the pelvic limb.
common digital extensor tendon
long digital extensor tendon
Depressions on the sides of the bone of the distal phalanx are distal attachments for __________.
collateral ligaments of coffin joint
What attach to the palmar/plantar processes of distal phalanx?
hoof cartilages
Foramina of the palmar/plantar processes perforate the _______ processes and lead to the ________ grooves.
palmar/plantar
parietal
Parietal grooves carry the _________ and __________ to distal phalanx (PIII).
dorsal arterial branch
dorsal branch of palmar/plantar digital N
Semilunar line of the distal phalanx is the distal attachment of __________.
distal digital annular ligament
Flexor surface of distal phalanx is where _________ inserts and the distal attachment for ___________.
deep digital flexor tendon
impar navicular ligament
The solear foramina of the distal phalanx transmit ___________ into the solear canal.
terminations of digital Aa + Vv
The flexor surface of the navicular (distal sesamoid) bone acts as a bearing surface for __________.
deep digital flexor tendon
_______________ attaches to the two extremities and the proximal border of the navicular bone.
collateral ligament of navicular bone
___________ extends from the distal border of the navicular bone to the flexor surface of the distal phalanx.
impar navicular ligament
