TOPIC 21

Question 1

Tarsal flexors and digital extensors

Answer 1

m. tibialis cranialis
m. extensor digitorum longus
m. peroneus longus
m. extensor digitorum lateralis
m. peroneus brevis
m. extensor halucis longus

Question 2

A.Tibialis Cranialis

Answer 2

●Comes from a.poplitea (ex.a.femoris)
branches:
- A.genus prox lat et med
- A.genus media
- A.genus dist lat et med
- med gives of: A.tibialis caudalis
●A.tibialis cran Branch: 
- R.superficialis, anast. A.saphena, r.cran
- R.nutricia
Runs with deep fibular nerve
●Passed the hook = A.petalis dorsalis
branches:
- A.arcuata
- A.metatarsea dors (dig II - V)

Question 3

Common fibular nerve

Answer 3

-One of the kast terminating branch of SCIATIC n.
-Passes over the lateral head of the m.gastrocnemius
-Devide into a deep and superficial branch
●Superficial fibular nerve
- Lies just caudal to the Peroneus longus muscle
- Follow common fibular n. Lift peroneus longus, nerve btw. peroneus longus/lat.dig.ext
- Runs with the cranial branch of saphenus a.
- Forms the dorsal common digital nerves innervatig the paw
●Deep fibular nerve
- Runs with cranial tibial artery, distaly
- Close to the bone
- Lie between the cranial tibial and the long digital extensor muscle - medially
- Forms dorsal common digital nerves innervating the paw

Question 4

M.tibialis cranialis

Answer 4

The most medial muscle
O: Lateral condyle and crista tibia + fibula
I: Medial on the tarsal and MT bones (MT2)
A: Flex the hook & supinate foot
a: a.tibialis cranialis
n: N.fibularis profundus

Question 5

M.extensor digitorum profundus

Answer 5

O: Fossa extensoria on lateral femoral condyle
I: Proc. extensorius of distal phalanx of dig. II-V
(Ph3, Dig II-V)
A: Extends joints of digits and flexes tarsus

(Between cran tibial and Peroneus longus)
Almost compleetly covered by peroneus longus
N: Deep fibular nerve

Question 6

M.Peroneus longus

Answer 6

Caudal to long.dig.ext
O: Lateral condyle of tibia, prox end of fibula + lateral colateral ligament of stifle
I: Tarsal I-II, MT II (lat->med)
A: assist in flexion of hook, pronates foot
N: Superf.fibular nerve

Question 7

M.extensor digitorum lateralis

Answer 7

O: Fibula + Lateral collateral lig of stifle
I: Tendon blends w/ long dig.ext tendon on 1st phalanx, digit V.
(Ph3, DigV)
A: Extends the relevant digits
N: Superf.fibular nerve

Question 8

M.Peroneus brevis

Answer 8

Weak muscle, deep lateral, distal to peroneus longus. 
Ca ONLY!
Bone, no belly
O: Fibula
I: MT V
A: Flex the hook

Question 9

M.extensor halucic longus

Answer 9

O: Middle part of fibula
I: 1st phalanx of the 2nd digits
(Ph3, Dig II)
A: Extend 2nd digits