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Anterior/Medial Thigh + Femoral Triangle Flashcards

1
Q

how many muscles are there in the anterior thigh?

A

8:
two make up iliopsoas
4 make up quadriceps femoris
plus sartorius + gracilis

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2
Q

which nerve innervates the anterior compartment?

A

femoral (L2-L4)

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3
Q

what is the general function of the anterior compartment?

A

extensors of knee

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4
Q

which 2 muscles make up iliopsoas?

A

iliacus and psoas major

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5
Q

what is the function of iliopsoas?

A

major hip flexor

also assists in lateral rotation

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6
Q

what are the attachments of the iliopsoas muscle?

A

psoas major comes from lumbar vertebrae, iliacus from the iliac fossa
both attach to lesser trochanter of femur

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7
Q

what is the innervation of iliopsoas?

A

psoas major = anterior rami of L1-L3

iliac = femoral nerve

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8
Q

name the muscles of quadriceps femoris

A

3 vastus muscles (medialis, intermedius + lateralis) and the rectus femoris

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9
Q

how does the quadriceps insert?

A

attaches to patella via quadriceps tendon, patella attaches to tibia by patellar tendon

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10
Q

what is the action of the vastus muscles?

A

extend knee

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11
Q

what is the innervation of quadriceps femoris?

A

anterior compartment, so femoral nerve

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12
Q

what are the attachments of rectus femoris?

A

ilium to patella by quadriceps tendon

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13
Q

which quadriceps muscle crosses both knee and hip joints?

A

rectus femoris

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14
Q

what is the action of rectus femoris?

A

flexes at knee, extends at hip

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15
Q

what are the attachments of the sartorius?

A

ASIS to superior medial surface of tibia

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16
Q

what is the action of sartorius?

A

at hip = flexor, abductor + lateral rotator
at knee = flexor
(sitting cross-legged on floor)

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17
Q

what is the action of pectineus?

A

adduction and flexion at hip

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18
Q

why can pectineus be considered either anterior or medial?

A

innervation of anterior (femoral)

action of medial (adduction and flexion at hip)

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19
Q

what are the attachments of pectineus?

A

pectineal line of pelvis to pectineal line on posterior femur

20
Q

what is the general action of the medial thigh compartment?

A

hip adduction

21
Q

which nerve innervates the medial thigh muscles?

22
Q

how many muscles are there in the medial thigh?

23
Q

name the 5 muscles in the medial thigh

A

adductor magnus, longus and brevis
obturator externus
gracilis

24
Q

what roots does the obturator nerve arise from?

25
Q

what are the attachments of each part of the adductor magnus?

A

adductor part: inferior rami of pubis + rami of ischium to linea aspera
hamstring part: ischial tuberosity to adductor tubercle of distal medial femur

26
Q

what are the actions of each part of adductor magnus?

A

both adduct thigh
adductor part also flexes thigh
hamstring part also extends thigh

27
Q

which nerves innervate each part of adductor magnus?

A

adductor part = obturator nerve

hamstring part = tibial nerve (L4-S3)

28
Q

what border of the femoral triangle does the adductor longus make up?

29
Q

what are the attachments of adductor longus?

A

pubis - expands into fan shape - attaches broadly to linea aspera

30
Q

what is the action of adductor longus?

A

adduction and medial rotation of thigh

31
Q

what muscle lies between the anterior and posterior divisions of the obturator nerve?

A

adductor brevis

32
Q

what are the attachments of adductor brevis?

A

body of pubis + inferior pubic rami to linea aspera (proximal to longus)

33
Q

what is the action of adductor brevis?

A

adduction of thigh

34
Q

what are the attachments of the obturator externus?

A

membrane of obturator foramen and associated bone to posterior aspect of greater trochanter

35
Q

what is the action of obturator externus?

A

laterally rotates thigh

36
Q

what are the attachments of the gracilis?

A

inferior rami + body of pubis to medial surface of tibia

37
Q

what is the action of gracilis?

A

adduction of thigh at hip, flexion of leg at knee

38
Q

which medial thigh muscle crosses hip and knee joints?

39
Q

what makes up the superior border of the femoral triangle?

A

inguinal ligament

40
Q

which border of the femoral triangle does the inguinal ligament make up?

41
Q

what makes up the lateral border of the femoral triangle?

42
Q

to which border of the femoral triangle does sartorius contribute?

43
Q

what makes up the medial border of the femoral triangle?

A

adductor longus

44
Q

what border of the femoral triangle does the adductor longus make up?

45
Q

what are the contents of the femoral triangle?

A 
(lateral to medial)
femoral nerve
femoral artery
fermoral vein
femoral canal (contains lymph vessels)
NAVEL

MSK (15 decks)

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