Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

MSK > Leg and Popliteal Fossa > Flashcards

Leg and Popliteal Fossa Flashcards

1
Q

how many muscles are there in the anterior compartment of the leg?

A

4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

name the 4 muscles in the anterior compartment of the leg

A 
tibialis anterior
extensor digitorum longus
extensor hallucis longus
peroneus tertius (fibularis tertius)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what innervates the anterior leg?

A

deep peroneal nerve (L4-L5)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what are the attachments of the tibialis anterior?

A

lateral tibia to base of metatarsal I

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is the general action of the anterior compartment of the leg?

A

dorsiflexion and inversion at ankle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is the action of tibialis anterior?

A

dorsiflexion and inversion of foot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

the tendons of which muscle can be palpated on the dorsum of the foot?

A

extensor digitorum longus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what are the attachments of the extensor digitorum longus?

A

lateral condyle of tibia and medial surface of fibular to each of the four lateral toes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is the action of extensor digitorum longus?

A

extension of lateral 4 toes

dorsiflexion of foot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what are the attachments of extensor hallucis longus?

A

medial surface of fibular shaft - crosses anterior to ankle joint - base of distal phalanx of great toe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what are the actions of extensor hallucis longus?

A

extension of great toe

dorsiflexion of foot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what are the attachments of peroneus (fibularis) tertius?

A

medial surface of fibular

metatarsal V

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is the action of peroneus (fibularis) tertius?

A

eversion and dorsiflexion of foot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

how many muscles are there in the lateral leg?

A

2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

name the 2 muscles in the lateral leg?

A

peroneal longus
peroneal brevis
(fibularis!)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what is the action of the two lateral leg muscles?

A

eversion - realistically, prevention of excessive inversion of foot while running

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

describe the path of peroneal (fibularis) longus

A

origin: superior and lateral surface of fibula + lateral tibial condyle
tendon descends, passes into foot posterior to lateral malleolus
crosses under foot (like stirrup!) and attaches to medial bones - medial cuneiform and metatarsal I

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what is the action of peroneal (fibularis) longus?

A

everision and plantar fexion

supports lateral and transverse arches of foot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

describe the path of peroneal (fibularis) brevis

A

origin: inferior and lateral surface of fibular shaft
descends into foot posterior to lateral malleolus
attaches to tubercle on metatarsal V

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what is the action of peroneal (fibularis) brevis?

A

eversion of foot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what innervates the lateral leg?

A

superficial peroneal nerve (L4-S1)

22
Q

how many muscles are there in the posterior leg?

A

7

23
Q

how many muscles are in the superficial layer of the posterior leg?

A

3

24
Q

how many muscles are in the deep layer of the posterior leg?

A

4

25
Q

name the 3 muscles in the superficial layer of the posterior leg?

A

gastrocnemius
plantaris
soleus

26
Q

where do the superficial muscles of the posterior leg insert?

A

calcaneus - calcaneal tendon (Achille’s heel)

27
Q

what is the action of the posterior leg muscles?

A

plantar flexion and inversion

28
Q

what innervates the posterior leg?

A

tibial nerve (terminal branch of sciatic)

29
Q

where do the two heads of gastrocnemius originate?

A 
lateral = lateral femoral condyle
medial = medial femoral condyle
30
Q

what is the action of gastrocnemius?

A

plantar flexion at ankle

also crosses knee, so flexes there

31
Q

name the 4 muscles innervated by the tibial nerve

A

the 3 superficial posterior leg muscles (gastrocnemius, plantaris, soleus) and the popliteus muscle

32
Q

where does the plantaris originate?

A

lateral supracondylar line of femur

33
Q

what is the action of plantaris?

A

plantar flexes at ankle, flexes at knee, although not vital for either of these movements

34
Q

where does soleus originate?

A

soleal line of tibia and proximal fibular area

35
Q

what is the action of soleus?

A

plantar flexion

36
Q

name the 4 muscles of the deep layer of the posterior leg

A

popliteus
tibialis posterior
flexor digitorum longus
flexor hallucis longus

37
Q

what is the action of popliteus?

A

“unlocks” knee by laterally rotating femur

38
Q

what are the attachments of popliteus?

A

posterior tibia to lateral condyle of femur

39
Q

what is the action of tibialis posterior?

A

inverts and plantar flexes foot

maintains medial arch of foot

40
Q

what are the attachments of flexor digitorum longus?

A

medial surface of tibia to plantar surfaces of lateral 4 toes

41
Q

what is the action of the flexor digitorum longus?

A

flexes lateral 4 toes

42
Q

what are the attachments of flexor hallucis longus?

A

posterior surface of fibula to plantar surface of phalanx of great toe

43
Q

what is the action of flexor hallucis longus?

A

flexes great toe

44
Q

what forms the superiomedial border of the popliteal fossa?

A

semimembranous

45
Q

what forms the superiolateral border of the popliteal fossa?

A

biceps femoris

46
Q

what forms the inferomedial border of the popliteal fossa?

A

medial head of gastrocnemius

47
Q

what forms the inferolateral border of the popliteal fossa?

A

plantaris and lateral head of gastrocnemius

48
Q

what forms the floor of the popliteal fossa?

A

posterior knee joint capsule

49
Q

what forms the roof of the popliteal fossa?

A

popliteal fascia and skin

50
Q

what are the contents of the popliteal fossa?

A 
(medial to lateral)
popliteal artery
popliteal vein
tibial nerve
common peroneal nerve

MSK (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions