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Anatomy of the Leg > Thigh > Flashcards

Thigh Flashcards

1
Q

Name the muscles in the anterior compartment of thigh.

A
  1. sartorius

2. quadriceps femoris: rectus femoris, vastus intermedius, vastus lateralis, vastus medialis

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2
Q

which muscle forms the roof of the adductor canal?

A

sartorius

*it is also the longest muscle in the body

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3
Q

origin/ insertion of sartorius

A

origin- ASIS and the notch below it

insertion- pes anserinus (on medial surface of the body of the tibia)

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4
Q

what is the innervation of the anterior comaprtment of the thigh?

A

femoral nerve

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5
Q

what is the arterial supply for anterior compartment of thigh?

A

femoral artery & profundus femoral a.

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6
Q

what is the function of sartorius?

A

flexes, abducts and laterally rotates the hip

flexes the knee and emdially rotates the leg from the flexed position

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7
Q

O/I of rectus femoris

A

origin: (2 tendons)
- straight (anterior) tendon arises from ASIS
- posterior tendon arises from a groove above acetabulum

insertion: base (superior border) of the patella via a thick aponeurotic tendon then via patellar ligament to the tibial tuberosity

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8
Q

which is the largest of the quadriceps muscles?

A

vastus lateralis

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9
Q

O/I of vastus lateralis?

A

origin- lateral lip of linea aspera, lateral lip of gluteal tuberosity, anterior and inferior borders of the greater trochanter and the proximal itnertrochanteric line

I- lateral border of patella and tendon of quadriceps femoris then via the patellar ligament to the tibial tuberosity

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10
Q

O/I of vastus medialis?

A

origin- distal intertrochanteric line, medial IM septum, tendons of adductor longus and magnus, proximal medial supracondylar line, medial lip of the linea aspera

I- medial border of the patella and the tendon of teh quadriceps femoris then via the patellar ligament to the tibial tuberosity

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11
Q

O/I of vastus intermedius?

A

O- proximal 2/3 of anterior and lateral surfaces of the femur
I- quadriceps tendon via the patellar ligament to the tibial tuberosity

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12
Q

O/I of articularis genu?

A

O- anterior surface of distal femur

I- synovial mb of the knee joint

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13
Q

the articularis genus is a small muscle located deep to what muscle?

A

vastus intermedius

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14
Q

which muscles make up the medial compartment of thigh?

A

(hip adductors)
gracilis
pectineus

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15
Q

what is the innervation to medial compartment of thigh?

A

obturator nerve

*note that pectinues m.

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16
Q

what is teh arterial supply to the medial compartment of thigh?

A

profundus femoral a.

17
Q

O/I of gracilis?

A

O- inferior 1/2 of pubic symphysis, pubic body, and the superior 1/2 of inferior pubic ramus

I- pes anserinus

18
Q

function of gracilis

A

adductor and medial rotator at the hip and a flexor at the knee

19
Q

O/I of pectineus

A

origin- pecten pubis, the bone anterior to the pecten pubis btwn the pubic tubercle and the iliopectineal eminence

insertion- pectineal line (line btwn the lesser trochanter and the linea aspera) on femur

20
Q

what is the pectineus innervated by?

A

femoral n.

note that eventhough it is in the MEDIAL compartment, it is innervated by the posterior compartment nerve- femoral n.

21
Q

function of pectineus

A

flexion, adduction and medial rotation of the hip

22
Q

O/I of adductor longus

A

origiin- front of the body of the pubis

insertion- media lip of the linea aspera btwn the attachments of the vastus medialis and adductor magnus

23
Q

the obturator nerve divides into anterior and posterior divisions around what muscles?

A

adductor brevis

24
Q

O/I of adductor brevis

A

origin- pubic body and inferior pubic ramus btwn gracilis and obturator externus

insertion- proximal part of the linea aspera

25
Q

which muscles is the most anterior of the adductor muscles?

A

adductor longus

  • adductor brevis lies posterior to adductor longus
  • adductor magnus lies deep to adductor brevis
26
Q

What is the adductor hiatus and in which muscle is it found?

A

found in the adductor magnus

allows passage of teh femoral vessels into the popliteal fossa

27
Q

O/I of adductor magnus

A

O- inferior pubic ramus, ramus of teh ischium and the ischial tuberosity
insertion- gluteal tuberosity , linea aspera, medial supracondylar line and adductor tubercle of teh femur

28
Q

innervation of adductor magnus

A

POSTERIOR division of obturator nerve and the tibial portion of sciatic nerve

29
Q

function of adductor magnus

A

adductor, felxor, and extensor of the hip

*all functions are possible because fo the different fiber orientations in the muscle

30
Q

Name the muscles in the posterior compartment of the thigh.

A

(hamstring muscles)

  1. biceps femoris
  2. semitendinosus
  3. semimembranosus
31
Q

O/I of biceps femoris

A

(2 heads)
origin- long head arises from the posterior part of the ischial tuberosity ; short head originates from the lateral lip of the linea aspera, the lateral supracondylar line of the femur and from the lateral IM septum

insertion- lateral side of the styloid process of the head of fibula and lateral condyle of tibia

32
Q

innervation of long and short head of biceps femoris?

A

long head- tibial nerve (makes sense it is in posterior thigh)
short head- COMMON PERONEAL NERVE

33
Q

function of biceps femoris

A

both heads act to flex the knee and laterally rotate the knee from the flexed position
*the long head EXTENDS and laterally rotates the hip

34
Q

O/I of semitendinosus

A

origin- ischial tuberosity

insertion- proximal part of the medial surface of the tibia

35
Q

function of semitendinosus

A

flex the knee and a medial rotator from full flexion

it also extends the hip

36
Q

O/I of semimembranosus

A

origin- ischial tuberosity

insertion- medial surface of the medial tibial condyle and to posterior surface of lateral femoral condyle

37
Q

function of semimembranosus

A

flexor at the knee and medial rotator from full flexion

also extends the thigh

38
Q

which muscle gives rise to fibers that proceed superolaterally to form the oblique popliteal ligament?

A

semimembranosus

39
Q

which is the only quadriceps muscle in the thigh that allows you to flex the hip also (because it crosses that joint)?

A

rectus femoris

it originates from the AIIS

Anatomy of the Leg (12 decks)

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