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Flashcards in Leg Deck (43)
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1

What are the boundaries of the popliteal fossa?

- Biceps femoris m.
- Semimembranosus m.
- Gastrocnemius, medial head
- Gastrocnemius, lateral head

2

What is contained w/in the popliteal fossa?

- Tibial n.
- Common fibular n.
- Popliteal a.
- Popliteal v.

3

What are the anastomotic aa. about the knee? What do they branch from?

- Superior medial genicular a.
- Superior lateral genicular a.
- Inferior medial genicular a.
- Inferior lateral genicular a.

All branch from popliteal a. (descending branch of lateral circumflex femoral a. gets in on it too)

4

Where does the popliteal a. divide, and what does it divide into?
Which is more of a continuation of the popliteal a.?

- Distal end of popliteal fossa (just below popliteus m.)
- Anterior and posterior tibial arteries (posterior is more of a continuation)

5

Where is the anterior tibial a. generally located?

b/w tibia and fibula bones (above interosseous membrane)

6

What m. does the beginning of the posterior tibial a. course over?

Tibialis posterior m.

7

After passing beneath the superior extensor retinaculum, What branches does the anterior tibial a. give off near the ankle?

Medial and lateral malleolar aa.

8

After passing beneath the inferior extensor retinaculum, what does the anterior tibial a. become?

Dorsalis pedis a.

9

Tibialis anterior m: OIIA?

O: Upper tibial shaft/interosseous membrane
I: Medial cuneiform/base of 1st metatarsal

I: Deep fibular n.
A: Dorsiflexes and inverts foot. (Plays role in medial longitudinal arch of foot)

10

Extensor digitorum longus m: OIIA?

O: Upper tibial shaft/interosseous membrane
I: Extensor expansion of lateral 4 toes

I: Deep fibular n.
A: Extends lateral 4 digits and dorsiflexes foot

11

Extensor hallucis longus m: OIIA?

O: Mid ant fibula
I: Base of 1st distal phalanx

I: Deep fibular n.
A: Extends great toe, dorsiflexes foot

12

Fibularis tertius m: OIIA?

O: Mid ant shaft of fibula
I: Shaft and base of 5th metatarsal

I: Deep fibular n.
A: Dorsiflexes and everts foot

13

What is a common action of mm. innervated by the deep fibular n?

Dorsiflexion of the foot
(anterior leg mm.)

14

What is a common action of mm. innervated by the superficial fibular n?

Eversion of the foot
(lateral leg mm.)

15

Fibularis longus m: OIIA?

O: Upper fibular & joint above
I: Plantar aspect of 1st metatarsal/medial cunieform, passing deep to long plantar ligament

I: Superficial fibular n.
A: Everts foot + weak plantarflexion

16

FIbularis brevis m: OIIA?

O: Inferior 1/3 fibular shaft
I: Base of 5th metatarsal

I: Superficial fibular n.
A: Everts foot + weak plantarflexion

17

Which is deeper, fibularis longus or brevis?

Brevis (longus sits on top)

18

Muscle paralysis of which leg m. would cause foot drop? Which n. is affected?

Tibialis anterior m.
- Deep fibular n.

19

What sensory area does the saphenous n. innervate?
What n. is the saphenous n. a continuation of?

- Medial leg and ankle
- Femoral n.

20

What sensory area does the deep fibular n. innervate?

Area b/w hallux and 2nd toe

21

What sensory area does the superficial fibular n. innervate?

Lateral leg up to mid shaft + dorsum of foot

22

Gastrocnemius m: OIIA?

O: Just above medial and lateral condyles
I: Calcaneal tendon/calcaneus

I: Tibial n.
A: Plantarflexion, some knee flexion

23

Soleus m: OIIA?

O: Mid tibia + upper fibula
I: Calcaneal tendon/calcaneus

I: Tibial n.
A: Plantarflexion, aids venous return

24

Plantaris m: OIIA?

O: Lateral supracondylar ridge of femur
I: Calcaneal tendon

I: Tibial n.
A: Plantarflexes foot, flexes knee

25

Which muscle's tendon is nicknamed the "freshman n."?
Where do you see it?

Tendon of plantaris, runs near medial soleus

26

Popliteus m: OIIA?

O: Upper posterior tibial shaft
I: Lateral condyle of femur

I: Tibial n.
A: Medially rotates and flexes leg at knee; *helps unlock fully extended knee

27

Tibialis posterior m: OIIA?

O: Upper tibia, fibula, and interosseous membrane
I: Navicular, all tarsal bones except talus, spring ligament (comes over medial talus)

I: Tibial n.
A: Plantarflexes, inverts, and adducts foot

28

Flexor digitorum longus: OIIA?

O: Post tibial shaft, upper
I: Base of distal phalanges of lateral 4 toes

I: Tibial n.
A: Flexes lateral 4 phalanges, plantarflexion, supports foot's longitudinal arch

29

Flexor hallucis longus: OIIA?

O: Lower 2/3 post fibula
I: Base of distal phalanx of hallux

I: Tibial n.
A: Flexes big toe, weak plantarflexion and inversion

30

What all pass distal to the medial malleolus, under the flexor retinaculum?

Tom, Dick, And Nervous Harry
1. Tibialis posterior tendon sheath
2. flexor Digitorum longus tendon sheath
3. posterior tibial Artery
4. tibial Nerve
5. flexor Hallucis longus tendon sheath