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Suspensory Apparatus function / mechanism
limit hyperextension of distal limbs + energy springboard VIA stabilizing palmar side of fetlock and digital joints
interosseus in the ox and horse
dog - muscle on palmar metatcarpals
ox - m w/ tendinous tissue
horse - ligamentous aka suspensory ligament
extensor branch of interosseus function
from distal interosseus parts -> CDE to prevent DDF from flexing coffin joint too far
name the distal sesamoidian ligaments
joint proximal sesamoids to each other
*not officially part of suspensory apparatus but important for stability
components of stay apparatus
1) triceps m
2) dorsoscapular ligament
3) Biceps muscle
4) collateral ligaments
5) palmar carpal ligament
stay apparatus 2nd step dorsoscapular lig
once standing weight transferred to forelimb via serratus ventralis attachment - strengthened via dorsoscapular lig
stay apparatus 3rd step
prox bicep attachment levered upwards w/ weight on prox scapula -> extends carpal and metacarpal joints.
4th step of stay apparatus collateral ligament of elbow
located caudal to axis of rotation -> favors extension
palmar carpal ligaments
cranial pull of lacertus fibrosus -> prevent flexion of carpus. palmar carpal ligament prevents extension
SDF and DDF tendons - transfers muscles transfer the force of this stretch to bone, protecting the muscle bellies/limiting hyperextension at fetlock
medial cutaneous antebrachial - runs dorsally down medial antebrachium to distal metacarpal
high 4 pt (high palmar)
low 4 pt (low palmar)
abaxial sesamoidean n block
palmar digital nerve block
low 4 pt blocks
medial and lateral palmars and palmar metacarpals
buttons as landmarks
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