8o EQUINE ANATOMY. 



POPLITEUS. 



Origin. — Outside external condyle of femur. 

 Insertion. — Into triangular surface on posterior surface of tibia 

 at its upper portion. 



Action. — Flexes tibia and rotates it outward. 

 Nerve. — Great sciatic. 



FLEXOR PROFUNDUS DIGITORUM OR PERFORANS. 



Origin. — To external tuberosity and posterior surface of tibia, 

 fibula and interosseous ligament. 



Insertion. — Passes through tarsal sheath on inner side of os 

 calcis and into semilunar crest of os pedis. 



Action. — Flexes phalanges on each other and on metatarsus. 



Nerve. — Great sciatic. 



OBLIQUE FLEXOR OF PHALANGES. 



Origin. — External tuberosity of tibia. 

 Insertion. — Upper third of metatarsus. 

 Action. — With preceding. 

 Nerve. — Great sciatic. 



POSTERIOR FOOT. 



Two hun-bricales and two interossei^ as in anterior foot. 



PEDAL MUSCLE. 



Origin. — Lower end of os calcis and astragalus. 

 Insertion. — Into tendons of extensors of phalanges. 

 Action. — Aids in extending digit and flexing hock. 

 Nej've. — Plan tar. 



Coccygeal Region. — (3 pairs.) sacro- coccygeus superior. 



Origin. — From side of spinous processes of last 3 or 4 sacral 

 vertebrae. 



Insertion. — Into coccygeal vertebrae. 



Action. — Elevates tail or carries it to one side. 



Ne7've. — Coccygeal. 



sacro-coccygeus inferior. 



Origin. — From third portion of sacrum, internal surface, of 

 sacro-sciatic ligament. 



