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MSK 2 > Posterior Thigh > Flashcards

Posterior Thigh Flashcards

1
Q

semitendinosus m origin

A

ischial tuberosity

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2
Q

semitendinosus m insertion

A

upper part of the medial surface of the tibia

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3
Q

semitendinosus m function

A

extend the thigh and flex the leg

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4
Q

semitendinosus m innervation

A

tibial division of the sciatic N

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5
Q

biceps femoris m parts

A

long head and short head

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6
Q

long head of biceps femoris m origin

A

ischial tuberosity

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7
Q

biceps femoris m insertion

A

lateral tibial condyle and head of the fibula

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8
Q

short head of biceps femoris m origin

A

lateral lip of the linea aspera of the femur

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9
Q

long head of biceps femoris m innervation

A

tibial division of the sciatic N

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10
Q

short head of biceps femoris m innervation

A

fibular division of the sciatic N

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11
Q

short head of biceps femoris m function

A

flex the leg

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12
Q

long head of biceps femoris m function

A

extend the thigh and flex the leg

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13
Q

What is the nerve most commonly injured in the lower extremity? Why?

A

common fibular nerve

superficial

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14
Q

semimembranosus m origin

A

ischial tuberosity

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15
Q

semimembranosus m insertion

A

medial and posterior surfaces of the medial condyle of the tibia

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16
Q

semimembranosus m innervation

A

fibular division of the sciatic N

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17
Q

semimembranosus m function

A

extend the thigh and flex the leg

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18
Q

What is the blood supply of the muscles in the posterior thigh?

A

perforating branches of the profunda femoris artery
inferior gluteal artery
femoral artery

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19
Q

Where does the popliteal artery arise from?

A

femoral artery

20
Q

when does the femoral artery turn into the popliteal artery?

A

adductor hiatus

21
Q

What way do patients with paralyzed posterior hamstrings tend to fall?

A

forward

22
Q

superiolateral boundary of the popliteal fossa

A

biceps femoris m

23
Q

superiomedial boundary of the popliteal fossa

A

semimembranosus m lateral to which is the semitendinosus m

24
Q

inferolateral and inferomedial boundary of the popliteal fossa

A

lateral and medial heads of the gastrocnemius m

25
Q

boundaries of the popliteal fossa

A

biceps femoris m, semimembranosus m, lateral and medial heads of the gastrocnemius m, skin and popliteal fascia

26
Q

posterior boundary of the popliteal fossa

A

skin and popliteal fascia

27
Q

floor boundary of the popliteal fossa
superior
inferior

A 
superior = medial and lateral supracondylar lines of femur
inferior = soleal line of tibia
28
Q

contents of popliteal fossa

A

termination of small saphenous V
popliteal A and V plus branches and tributaries
tibial and common peroneal (fibular) nerves
posterior cutaneous N of thigh
popliteal lymph nodes and lymphatic vessels

29
Q

What do the popliteal lymph nodes drain?

A

lymph from foot and leg

30
Q

What is the popliteal fossa continuous with?

A 
superiorly = fascia lata
inferiorly = deep fascia of the leg
31
Q

What is the function of the popliteal fascia?

A

protective covering for the neurovascular structures passing through the leg at this region

32
Q

What lies deepest in the popliteal fossa?

A

arteries - directly on popliteal surface of the femur, joint capsule, and investing fascia of the popliteus forming the floor of the fossa

33
Q

Where does the sciatic nerve end?

A

superior angle of the popliteal fossa

34
Q

What does the sciatic nerve divide into?

A

tibial and common fibular nerves

35
Q

What does the tibial nerve provide?

A

soleus, gastrocnemius, plantaris, popliteus muscles

36
Q

Where is the tibial nerve located in the popliteal fossa?

A

medial

37
Q

Where is the common fibular nerve located in the popliteal fossa?

A

lateral

38
Q

What landmark does the common fibular nerve pass?

A

lateral head of the gastrocnemius m and posterior aspect of the head of the fibula

39
Q

What does the posterior cutaneous nerve of the thigh supply?

A

skin covering the popliteal fossa

40
Q

What does the popliteal artery turn into?

A

anterior and posterior tibial arteries

41
Q

What supplies blood to the leg during full knee flexion?

A

anastomotic network of genicular branches of the popliteal artery

42
Q

What do the muscular branches of the popliteal artery supply?

A

hamstrings, gastrocnemius, soleus, and plantaris muscles

43
Q

What is the popliteal vein a continuation of?

A

posterior tibial vein

44
Q

What does the popliteal vein continue as? Where?

A

femoral vein, adductor hiatus

45
Q

What does the small saphenous vein a tributary of?

A

popliteal vein

46
Q

Where do the superficial lymph nodes of the popliteal fossa lie?

A

superficial fossa

47
Q

Where do the lymphatic vessels from the popliteal nodes drain?

A

deep iguinal lymph nodes

MSK 2 (15 decks)

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