Topic 19 - Tarsal extensors

Question 1

The muscles

Answer 1

M.gastrocnemicus
M.flexor digitorum superficialis
M.tibialis caudalis
M.flexor digitorum profundus

Question 2

M.gastrocnemicus

Answer 2

O: Med. and lat. supracondylar tuberosities of femur (inside their heads -caput med. and -lat. there are the sesamoid/Vesalius bones
I: Tuber calcanei (as a part of common calcaneal tendon)
A: Flexes stifle, extends tarsus

Question 3

M.flexor digitorum superficialis

Answer 3

O: Fossa supracondylaris of femur, partly fused with m.gastrocnemicus caput lat.
I: It´s tendo plantaris turns from med. to lat. direction around common calcanean tendon, on the surface of tuber calcanei it makes a cap (gale calcanea) then finally attaches to middle phalanx of digit 2-5 on plantar surface
A: Flexes stifle, extends hock, flexes joints of digits 2-5

Question 4

M.tibialis caudalis

Answer 4

O: Caudally on head of fibula
I: Med. at tarsus it radiates into tarsal fascia
A: Extends tarsus

Question 5

M.flexor digitorum profundus

Answer 5

Two musces: M.flex.dig. lateralis and - medialis
O: -lateralis from prox. cau. half of fibula, prox. caudolat. border of tibia and interosseous membrane, -medialis starts caudo-prox. from tibia.
Below tarsus the two parts unites.
I: Plantar surface of dist. phalanx of digit 2-5 on tub.flexorium
A: Ext. tarsus, flex. joints of digits 2-5