Muscles (O, I, A) P. 18-19

Question 1

M. tibialis cran.

Answer 1

O: Cran. margin of condylus lat. (tibia) + crista tibiae

I: Medial side of Os tarsi I + Mt. I-II

A: Flexes tarsus

Question 2

M. peroneus longus

Answer 2

O: Cran. margin of condylus lat. (tibia), caput fibula, lig. collat. lat.

I: Os tarsi IV + all Mt. bones (plantar surface)

A: Flexes tarsus

Question 3

M. peroneus brevis

Answer 3

O: Laterally on distal 3rd of fibula

I: Base of Mt. V

A: Flexes tarsus

Question 4

M. ext. dig. longus

Answer 4

O: Fossa extensoria (on condylus lat. on femur)

I: Proc. extensorus on digits II-V

A: flexes tarsus, extends digits

Question 5

M. ext. dig. lat.

Answer 5

O: Prox. 3rd of fibula

I: unites w/ M. ext. dig. longus to reach digit V

A: Extends and abducts digit V

Question 6

M. ext. digiti I. longus

Answer 6

O: Middle 3rd of fibula

I: Digit II

A: Extends digit II (and I if it’s present)

Question 7

M. gastrocnemius

Answer 7

O: Tuberositas supracondylaris med. et lat. (femur)

I: Tuber calcanei (part of common calcaneal tendon)

A: Flex stifle, extends tarsus

Question 8

Tendo calcaneus communis

Answer 8

• 3 main tendond:
  > Tendo m. gastrocnemii (name muscle)
  > Tendo plantaris (name muscle)
  > Tendo acceccorius (3 muscles, name them)
• As tendo plantaris widens, forms galea calcanea

A: Strongest extensor of tarsus

Question 9

M. flex. dig. superf.

Answer 9

O: Fossa supracondylaris (femur), partly fused w/ M. gastrocnemius caput lat.

I: ~ Tendo plantaris turns from med. to lat. direction around tendo calcaneus communis.
~ On the surface of tuber calcanei it makes a cap (galea calcanea).
~ Then finally attaches to digits II-V as manica flexoria (plantar surface)

A: Flex stifle, extends tarsus (hock), flex joints of digits II-V

Question 10

M. tibialis caud.

Answer 10

O: Caudally on caput fibula

I: Medially on tarsus (radiates into tarsal fascia)

A: Extends tarsus

Question 11

M. popliteus

Answer 11

O: Fossa m. poplitei (on condylus lateralis on femur)

I: Linea m. poplitei (Caudally on prox. part of tibia)

A: Flex stifle & pronates leg (moves it med.)

Question 12

M. flex. dig. prof.

Answer 12

O:
> M. flex. dig. lat. - prox. caud. half of fibula, caudolateral border of tibia, and from interosseus membrane
> M. flex. dig. med. - Caudo-proximally from tibia

!!They unite below tarsus!!

I: Tuberculum flexorium of digits II-V, plantar surface (and digit I, if present?)

A: Extends tarsus, flex joints of digits II-V (and digit I, if present?)