Pelvic Limb IV - Ungulate Flashcards
What species refers to the rump? Croup?
Artiodactyls; horse
What is the highest point of the rump/croup formed by?
Tubera sacrale of ilia
Prominent tubera coxae of ilial wings referred to as?
hook bones
Ischiatic tuberosities referred to?
pin bones
Region between the coxofemoral and stifle joints.
Thigh
Region between stifle and tarsus
Crus
Region between the tarsus and metatarsophalangeal joint
Metatarsus
Region between the metatarsophalangeal and distal interphalangeal joints
Pastern
Region enclosed by hoof capsule.
Foot or hoof
What structures form the pes? What forms the digit?
Tarsus, metatarsus, pastern, and foot
Pastern and foot
Tarsus also known as?
hock
3rd metatarsal bone also known as? 2nd and 4th?
Cannon bone
Splint bones
Metatarsophalangeal joint also known as?
fetlock joint
Proximal interphalangeal joint also known as?
Pastern joint
Distal interphalangeal joint also known as?
Coffin joint
Proximal phalanx also known as? Middle? Distal?
Long pastern bone
Short pastern
coffin
What are chestnuts?
thickened cornified epidermis
remnants of tarsal pads in horse
What are ergots?
remnant of metatarsal pads
Ruminants have vestigial digits called? Weight bearing?
Dewclaws
NO
Pig II and IV digits are called? Weightbearing?
paradigits
NO
Sheep have scent marking, sebaceous apocrine glands on all four feet called?
Interdigital sinus
Describe the greater trochanter in a horse.
Cranial/caudal parts, very large prominence
What attaches to the greater trochanter? Function of m.?
Middle gluteal m.
Powerful extensor of hip
Third trochanter attachment for what muscle in horse?
Superficial gluteal m.
What species do not have a third trochanter? Why?
Ruminants, pigs
Superficial gluteal m. attached into biceps femoris to form gluteobiceps m.
Describe location of accessory gluteal and what species have it?
Deeper part of middle gluteal
ungulates
Where is the trochanteric bursa found?
Deep to attachment of accessory gluteal on greater trochanter
Inflammation of trochanteric bursa is called?
Whorlbone lameness
Gluteal muscles are a site of? Advantages?
IM injections
very large muscle mass that can cope with large amounts of medication
What are the two hamstring muscles?
Semitendinosus and Semimembranosus
Hamstring muscles site of? Advantages/disadvantages?
IM injections
large mass, easy to drain
potential injury development of fibrotic myopathy, best for smaller volumes
Attachments of semitendinosus m.?
proximally to sacral and caudal vertebrae, sacrosciatic ligament and ischiatic tuberosity
Distally to cranial tibia, crural fascia, tendinous slip to calcaneal tendon
What is the gait like in fibrotic myopathy?
Mechanical hindlimb lameness characterized by foot abruptly slapping the ground at the end of the cranial swing phase of the stride (most obvious at walk)
Consequence of scarring to hamstrings?
Leg cannot fully extend out at end of swing phase
How many patellar ligaments do the horse and ox have? Small ruminants and pig
Three
One
What are the patellar ligaments a continuation of?
Quadriceps femoris
Functions of patella?
Changes the direction of the pull, absorbs pressure and transmits traction to the quadriceps to the tibial tuberosity through the patellar ligaments
Function of the meniscofemoral ligament?
binds to caudal aspect of the lateral meniscus to the caudal femur
Increasing stabilization of this portion of the meniscus
Describe the patella locking mechanism.
assists the horse in parking its pelvic limb in a weight bearing position with minimal energy while resting other PL
Four structures associated with PLM?
- Intermediate patellar ligament
- Patella
- Parapatellar fibrocartilage
- Medial patellar ligament
Predispositions of upward fixation of the patella?
straight hindlimb conformation, poor quad tone, young maturing horses
Describe UFP.
patella catches or remains stuck in locked position because of reciprocal apparatus (when stifle is locked, so is tarsus)
Three synovial sacs in the stifle?
Femoropatellar
Medial femorotibial
Lateral femorotibial
Cat dog synovial sac communication? Ruminants and pigs? Horses?
all communicate freely
Typically communicate
Variable (MFT and FP communicate the most)
Best to consider horse synovial sacs as?
Separate
Location of femoropatellar joint? Lateral femorotibial? Medial femorotibial?
between patellar ligaments
Btwn lateral patellar and lateral collateral lig.
Btwn medial patellar and medial collateral lig.