MUSCLES OF PASTERN and COFFIN JOINTS - HL

Question 1

EXTENSORS

Answer 1

1. M. Extensor digitorum Longus
2. M. Extensor Digitorum lateralis
3. M. Extensor Digitorum Brevis
4. M. Extensor Halucis Longus

Question 2

FLEXORS

Answer 2

1. M. Flexor Digitorum Superficialis
2. M. Flexor Digitorum Profundus
3. M. Flexor Digitorum Brevis
4. Mm. Interflexorii
5. Mm. Lumbricalis
6. Mm. Interossi

Question 3

A: Canine muscles: Lat–> Med (EXTENSORS)
B: Canine muscles: Oposite direction Caudal–> Cranial

Answer 3

A: TIB - EX - FIB - EX - FIB - (EX)

1. Tibialis Cranialis
2. Extensor digitorum longus
3. Peroneus Longus (FIBULARIS)
4. Extensor Digitorum Lateralis
5. Peroneus Brevis

B:

1. M. Gastrocnemius
2. M. Flexor digitorum superficialis
3. M. Flexor digitorum Profundum

+ short digital extensor
+ M. interosseus = Suspensory lig.

Question 4

A: EQUUNE muscles: Lat–> Med (EXTENSORS)
B: EQUUNE muscles: Oposite direction Caudal–> Cranial

Answer 4

A: TIB - EX - FIB - EX

1. Tibialis Cranialis
2. Extensor digitorum longus
3. Peroneus TERTIUS
4. Extensor digitorum lateralis

B:

1. M. Gastrocnemius + M. Soleus = M. Triceps Sureae
2. M. Flexor Dig. Superf.
3. M. Flexor dig. Prof

+ short dig extensor
+ M.INTEROSSEUS = SUSPENSORY LIGAMENT

Question 5

1. M. Extensor digitorum Longus

Answer 5

O: fossa extensoria on lateral femoral condyle

I: extensor processes of distal phalanx of digits II-V.

A: extends joints of digits and flexes tarsus

Question 6

2. M. Extensor Digitorum lateralis

Answer 6

O: proximal third of fibula

I:
unites with long digital extensor’s tendon to reach digit V. distal phalanx

A: extension and abduction of digit V.

Question 7

3. M. Extensor Digitorum Brevis

Answer 7

?

Question 8

4. M. Extensor Halucis Longus

Answer 8

M. extensor digiti I. [hallucis] longus

O: from middle third of fibula

I: radiates into fascia over metacarpophalangeal joint of digit II.

4A: extends digit II. (and digit I. if it’s present)

Question 9

1. M. Flexor Digitorum Superficialis

Answer 9

O: fossa supracondylaris of femur,
partly fused with m. gastrocnemius caput lateralis

I:
- its plantar tendon (tendo plantaris) turns from medial to lateral direction around common calcaneal tendon,
- on the surface of tuber calcanei it makes a cap
(galea calcanea),
- then finally attaches to middle phalanx of digits II-V. on plantar surface

A: flexes stifle, extends hock, flexes joints of digits II-V

Question 10

2. M. Flexor Digitorum Profundus

Answer 10

O:

1. m. flexor digitorum lateralis
   (former: m. flexor hallucis longus)
   - from proximal caudal half of fibula, proximal caudolateral border of tibia

• and from interosseous membrane;
  2 m. flexor digitorum medialis
  (former: m. flexor digitorum longus) starts caudo-proximally from tibia.
• Below tarsus the two parts unite.

I: plantar surface of distal phalanx of digits II-V.
(on tuberculum flexorium)

A: extends tarsus, flexes joint if digits II-V

Question 11

3. M. Flexor Digitorum Brevis

Answer 11

?

Question 12

4. Mm. Interflexorii
5. Mm. Lumbricalis
6. Mm. Interossi

Answer 12

?