Muscles of the Crus

Question 1

Cranial tibial m.

Answer 1

Craniolateral crus m.

O = Extensor groove and cranial border of the tibia.
I = Proximal plantar surface of the first and second metatarsal bones
A = Flex the tarsal jts.

Question 2

Peroneus longus m.

Answer 2

Craniolateral crus m.

O = Lateral condyle of the tibia, fibular head, lateral collateral ligament of the stifle jt.
I = Fourth tarsal bone, plantar aspect of the proximal ends of metatarsal
A = Flex the tarsal jts.

Question 3

Long digital extensor m.

Answer 3

Craniolateral crus m.

O = Extensor fossa of the femur
I = Dorsal aspect of the digital phalanges 2-5
A = Flex the tarsal jts.
Extend the metatarsophalangeal and proximal/Distal interphalangeal jts. 2-5

Question 4

Gastrocnemius m.

【ガストロクネミアス】

Answer 4

Caudal crus m.

O = Medial & Lateral supracondylar tuberosities of the femur
I = Tuber calcanei
A = Flex the stifle jt.
Extend the tarsal jt.

Question 5

Superficial digital extensor m.

Answer 5

Caudal crus m.

O = Lateral supracondylar tuberosity of the femur
I = Tuber calcanei/Plantar aspect of the proximal end of the middle 2-5
A = Flex the stifle jt.
Extend the tarsal jts.
Flex the metatarsophalangeal and proximal interphalangeal 2-5 jts

Question 6

Deep digital flexor m. (of the crus)

Answer 6

Caudal crus m.

O = Caudal aspect of the proximal
Fibula and interosseous membrane
I = Plantar surface of the base of the distal phalanges of all 5 digits.
A = Extnd tarsal jts.
Flex metatarsophalangeal jts.
Flex proximal and distal interphalangeal jts of all 5 digits

Question 7

Popliteus m.

Answer 7

Caudal crus m.

O = Popliteal fossa of femur.
I = Caudal and medial surface of the proximal tibia
A = Flx the stifle joint
Rotate leg medially