Complete List of Terms and Definitions for Bryan - Gross Anatomy - Large Animal Osteology and Muscles of the Distal Pelvic Limb - Spring 2010

Terms Definitions
What muscle rotates the crus medially? Popliteus (its the pooper looker atter)
What does the distal extensor retinaculum bind down? long digital extensor
lateral digital extensor
What does the proximal extensor retinaculum bind down? long digital extensor
peroneus tertius
cranial tibial
What is the cunean bursa sandwiched between? Cunean tendon and medial collateral ligament of the hock
Which muscles extend digit 3 in the ruminant? Long digital extensor ONLY
What are the extensors of the hock in the horse and ox? Gastrocnemius
Soleus
SDF
DDF
T or F:
In the ruminant, the medial tendon of long digital extensor inserts on both digits 3 and 4 while the lateral tendon only inserts on digit 3.
False!
The LATERAL tendon inserts on digits 3 and 4 and MEDIAL only inserts on digit 3.
What is the function of the reciprocal apparatus? Extends the stifle extends the hock.
Flexing the stifle flexes the hock.
What muscles originate from the extensor fossa of the femur? Peroneus tertius
Long digital extensor
What are the two actions of the gastrocnemius in the horse? Why can't it do these actions simultaneously? Flex stifle and extend hock
Peroneus tertius prevents this
What comprises the reciprocal apparatus of the equine pelvic limb? SDF and peroneus tertius
Both heads of the gastrocnemius originate from the supracondylar tuberosities in the horse and ox. Which animal has the heads also originating from the epicondyles? Ox
T or F:
All muscles that extend the hock are innervated by the tibial n.
True!
Which muscles are flexors of the hock in the horse and ox distal pelvic limb? Cranial tibial
Long digital extensor
Peroneus tertius (kinda)
Lateral digital extensor
Short digital extensor (horse only)
Peroneus longus (ox only)
Which tarsal bones are fused in the ox? 2nd and 3rd
Central and 4th
Which muscles extend digit 4 in the ruminant? Lateral and long digital extensor
Which equine structure flexes the hock when the stifle is flexed? Peroneus tertius
What makes up the common calcaneal tendon? Gastrocnemius
Soleus
SDF
Semitendinosus
Gracilis
Biceps Femoris (Gluteobiceps)
What are the flexors of the stifle (in the distal pelvic limb)? Gastrocnemius
Popliteus
Which check ligament (present in the thoracic limb) is the pelvic limb lacking? Proximal check ligament - SDF attaches to tuber calcanei
What are the two calcaneal bursae and what structures are they sandwiched between? Subcutaneous calcaneal bursa (btw skin and SDF tendon)
Subtendinous calcaneal bursa (btw SDF and tuber calcanei)
What does the middle extensor retinaculum bind down? long digital extensor
(may not be in ruminant)
Which joints are in the stifle region of the large animal? Tibiofemoral
Femoropatellar
What is another name for the cunean tendon? Medial tendon of the Cranial Tibial m.
T or F:
Below the level of the stifle, the tibial n. innervates ALL flexors of the stifle and extensors of the hock.
True!
It innervates SDF, DDF, Popliteus, Soleus, and Gastrocnemius
Which tarsal bones are fused in the horse? 1st and 2nd