anatomy - muscles of the crus and digits

Question 1

what is the origin, insertion, action, and innervation of the cranial tibial muscle

Answer 1

* origin: extensor groove of tibia
* insertion: plantar surface of metacarpals 1 and 2
* action: flex tarus, lateral rotation of paw
* innervation: fibular nerve

Question 2

what is the origin, insertion, action, and innervation of the long digital extensor

Answer 2

* origin: extensor fossa of femur
*** insertion: **extensor processes of distal phalanges of digits 2-5
* action: extend digits and flex tarsal joint
* innervation: fibular nerve

Question 3

what is the origin, insertion, action, and innervation of the fibularis longus

Answer 3

* origin: lateral condyle of tibia, proximal end of fibula, lateral epicondyl of femur
* insertion: 4th tarsal bone; plantar aspect of metatarsals
* action: flex tarsal joint and rotate paw medially
* innervation: fibular nerve

Question 4

what is the origin, insertion, action, and innervation of the gastrocnemius muscle

Answer 4

* origin: medial and lateral supracondylar tuberosities of femur
* insertion: tuber calcanei
* action: extend tarsal joints and flex stifle
* innervation: tibial nerve

Question 5

what is the origin, insertion, action, and innervation of the superficial digital flexor

Answer 5

* origin: medial and lateral supracondylar tuberosities of femur
* insertion: tuber calcanei
* action: extend tarsal joint and flex stifle joint
* innervation: tibial nerve

Question 6

what is the origin, insertion, action, and innervation of the deep digital flexor

Answer 6

* origin: caudal proximal tibia, proximal tibula
* insertion: flexor tubercle on plantar surface pf each distal phalanx
* action: flex digits and extend tarsal joint
* innervation: tibial nerve