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Med School Yr 2 > Muscles of the Thigh > Flashcards

Muscles of the Thigh Flashcards

1
Q

what muscles are in the anterior compartment of the thigh?

A
  • iliopsoas
  • sartorius
  • quadratus femoris - rectus femoris, vastus lateralis, vastus medialis, vasteus intermedius
  • pectineus
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2
Q

muscles of the anterior thigh are innervated by what? what is their arterial supply?

A

femoral nerve - L2 - L4
arterial supply - femoral artery

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3
Q

where does the iliopsoas pass under?

A

inguinal ligament

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4
Q

iliopsoas is a combination of what two muscles?

A

psoas major muscle and iliacus

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5
Q

what are the origins and insertions of iliopsoas?

A

origin - (psoas major) lumbar vertebrae and iliac fossa of pelvis (iliacus)
inserts - lesser trochanter of femur

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6
Q

what are the actions of ilopsoas?

A

flexion of thigh at hip

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7
Q

what is the longest muscle in the body?

A

sartorius

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8
Q

what are the origins and insertions of sartorius?

A

origins - ASIS
inserts - superior, medial surface of tibia

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9
Q

what are the actions of the sartorius?

A

hip - flexes, abducts, laterally rotates
knee - flexes

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10
Q

what is the quadratus femoris made up of?

A

rectus femoris
vastus lateralis
vastus medialis
vastus intermedius

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11
Q

what are the origins and insertions of rectus femoris

A

origin - AIIS and ilium
inserts - patella via quadriceps femoris tendon

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12
Q

what are the origins and insertions of vastus lateralis

A

origins - greater trochanter and lateral lip of linea aspera
inserts - patella

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13
Q

what are the origins and insertions of vastus medialis?

A

origin - interotrochanteric line and medial lip of linea aspera
inserts - patella

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14
Q

what are the origins and insertions of vastus intermedius

A

origin - anterior and lateral surfaces of femoral shaft
inserts - patella

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15
Q

what is the collective action of the quadratus femoris?

A

extension of the knee
(rectus femoris also flexes hip)

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16
Q

what are the origins and insertions of the pectineus?

A

origin - pectineal line of pubis
inserts - pectineal line on posterior femus (inferior to lesser trochanter)

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17
Q

what is the actions of the pectineus?

A

adducts and flexes hip

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18
Q
A
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19
Q
A
20
Q
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21
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22
Q

what muscles are in the medial compartment of the thigh?

A

gracilis
obturator externus
adductor brevis
adductor longus
adductor magnus

23
Q
A
24
Q
A
25
Q
A
26
Q

what is the innervation of the muscles in the medial thigh?

A

obturator artery (L2-L4)

27
Q

what are the origins and insertions of obturator externus?

A

origin - membrane of obturator foramen
inserts - posterior greater trochanter

28
Q

what are the actions of the obturator externus?

A

adduction and lateral rotation of thigh

29
Q

what are the origins and insertions of adductor longus

A

origins - pubis bone
inserts - linea aspera of femur

30
Q

what are the actions of the adductor longus?

A

adducts thigh

31
Q

what are the origins and insertions of adductor magnus?

A

origin - inferior rami of pubis and ramus of ischium (adductor component) and ischial tuberosity (hamstring component)
inserts - linea aspera (adductor component) and adductor tubercle of femur

32
Q

what are the actions of adductor magnus

A

adductor component - adduction and flexion of thigh
hamstring component - adduction and extension

33
Q

what is the innervation of adductor magnus?

A

adductor - obturator nerve
hamstring - tibial component of sciatic nerve

34
Q

what are the origins and insertions of adductor brevis

A

origin - body of pubis and inferior pubic rami
inserts - linea aspera

35
Q

what is the action of the adductor brevis?

A

adduction

36
Q

what are the origins and insertions of gracilis?

A

origin - inferior rami of pubis and body of pelvis
inserts - medial surface of tibial shaft

37
Q

what is the action of the gracilis?

A

adducts thigh at hip and flexes leg at knee

38
Q

what muscles are found in the posterior compartment of the thigh?

A

hamstrings - biceps femoris, semitendinous, semimembranous

39
Q

what are the origins and insertions of semitendinosus?

A

origin - ischial tuberosity of pelvis
inserts - medial surface of tibia

40
Q

what are the actions of the semitendinosus?

A

flexes leg at knee
extends thigh at hip
medially rotates leg

41
Q

what is the innervation of semitendinosus and semimembranosus?

A

tibial part of sciatic nerve (L4-S3)

42
Q

what are the origins and insertions of semimembranosus

A

origin - ischial tuberosity (more superior than ST)
inserts - medial tibial condyle

43
Q

what are the actions of semimembranosus?

A

flexes lef at knee
extends thigh at hip
medially rotates leg

44
Q

what is the most lateral muscle in the posterior compartment

A

biceps femoris

45
Q

what are the origins and insertions of biceps femoris

A

origin - ischial tuberosity (longhead) and linea aspera (short head)
inserts - form tendon that inserts on head of fibula

46
Q

what are the actions of the biceps femoris?

A

flexion at knee
extends thigh at hip
laterally rotates leg

47
Q

what is the innervation of biceps femoris?

A

long head - tibial part of sciatic nerve
short head - common fibular

Med School Yr 2 (96 decks)

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