TOPIC 31A. Statics of the hindlimbs in horses, the phases of the step on the distal end of the hindlimb Flashcards
What manner does the HL function in
catapult system, providing propulsive force
difference to FL
bears less body weight, more angled
how does it have reciprocal apparatus
stifle infront
hock behind
what is mechanisms of movement controlled by
m peroneus tertius (tendinous) and SDF (common calcaneal tendon)
if stifle is locked ..
so is the hock
what helps in locking the HL
patellar loop
what does the contraction of m rectus femoris do
pulls the patella up over trochlea of femus to supratrochlear fossa
what ligaments are hooked over tuberculum trochlea ossis femoris
medial and intermedial patellar ligaments
Why is there is no accessory ligament of SDF in HL
Because of tuber calcanea and galea calcanea
trotting
2 beat gait
simple diagonal rhythm
what step length is trotting
2-2.3m
what speed is trotting
14-18km/hr
what limbs are syncd in trotting
LH - RF and RH- LF
in fast trot
the thrust phase is shorter than the swing
in the slow trot
the swing phase is shorter than the thrust
the gallop
4 beat gait
step length of gallop
4.5 - 8m
speed of gallop
middle - 5-9m/sec
racing - 12-14m/sec
what co-ordination in gallop
paired between HL and FL
left gallop
left fl leads - left hand curve
right gallop
right fl leads - determines direction
what is the impulse generated by in gallop
the outer HL - if right gallop then LH.
what is the canter
the collected gallop
3 beat gait
what land together in canter
2 paired non-leading limbs
what prep is made for a jump
neck and head are raised - has a braking effect
execution of a jump involved
FL’s lifted
back muscles lift the trunk
what happens when jump is completed
the head and neck are lifted to reduce the speed
the fetlocks are hyperextended
