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Anatomy Exam 3 > Thigh Muscles > Flashcards

Thigh Muscles Flashcards

1
Q

What are the Flexors of the Hip Joint?

A
  • Pectineus
  • Iliopsoas (Psoas Major)
  • Psoas mionor
  • Iliacus
  • Sartorius
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2
Q

Are the Flexors of the Hip Joint Anterior or Posterior?

A

ANTERIOR Muscles of thigh

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3
Q

What is the origin (proximal attachment) of the Pectineus?

A

Superior ramus of pubis

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4
Q

What is the insertion (distal attachment) of the Pectineus?

A

Pectineal Line of femur, just inferior to lesser trochanter

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5
Q

What is the innervation of the Pectineus?

A

Femoral nerve (L2, L3),

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6
Q

What is the main action of the Pectineus?

A

Adducts and flexes thigh; assists with medial rotation of thigh

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7
Q

What is the origin (proximal attachment) of the Iliopsoas & (Psoas major)?

A

Sides of T12-L5 vertebrae and discs between them; transverse processes of all lumbar vertebrae

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8
Q

What is the insertion (distal attachment) of the Iliopsoas & (Psoas major)?

A

Lesser trochanter of femur

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9
Q

What is the innervation of the Iliopsoas & (Psoas major)?

A

Anterior rami of Lumbar nerves (L1, L2, L3)

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10
Q

What is the origin (proximal attachment) of the Psoas minor?

A

Sides of T12-L1 vertebrae and intervertebral discs between them

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11
Q

What is the insertion (distal attachment) of the Psoas minor?

A

Pectineal line, iliopectineal eminence via iliopectineal arch

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12
Q

What is the innervation of the Psoas minor?

A

Anterior rami of Lumbar nerves (L1, L2)

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13
Q

What is the origin (proximal attachment) of the Iliacus?

A

Iliac crest, iliac fossa, ala of sacrum, and anterior sacro-iliac ligaments

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14
Q

What is the insertion (distal attachment) of the Iliacus?

A

Tendon of psoas major, lesser trochanter, and femoral distal to it

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15
Q

What is the innervation of the Iliacus?

A

Femoral nerve L2, L3

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16
Q

What is the main action of the

  • Iliopsoas & (Psoas major)
  • Psoas minor
  • Iiliacus
A

Act conjoinly in flexing thigh at hip joint and in stabilizing this joint

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17
Q

What is the origin (proximal attachment) of the Sartorius?

A

Anterior superior iliac spine and superior part of notch inferior to it

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18
Q

What is the insertion (distal attachment) of the Sartorius?

A

Superior part of medial surface of tibia

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19
Q

What is the innervation of the Sartorius?

A

Femoral nerve (L2, L3)

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20
Q

What is the main action of the Sartorius?

A

Flexes, abducts, and laterally rotates thigh at hip joint; flexes leg at knee joint, (medially rotating leg when knee is flexed)

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21
Q

What are the Extensors of the Knee?

A
  • Quadriceps Femoris
    1. ) Rectus femoris
    2. ) Vastus lateralis
    3. ) Vastus medialis
    4. ) Vastus intermedius
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22
Q

Are the Extensors of the Knee Anterior or Posterior?

A

ANTERIOR!!!!

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23
Q

What is the origin (proximal attachment) of the Rectus femoris?

A

Anterior inferior iliac spine and ilium superior to acetabulum

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24
Q

What is the origin (proximal attachment) of the Vastus lateralis?

A

Greater trochanter and lateral lip of linea aspera of femur

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25
Q

What is the origin (proximal attachment) of the Vastus medialis?

A

Intertrochanteric line and medial lip of linea aspera of femur

26
Q

What is the origin (proximal attachment) of the Vastus intermedius?

A

Anterior and lateral surfaces of shaft of femur

27
Q

What is the insertion (distal attachment) for ALL the muscles of the Quadriceps femoris?

A
  • Via common tendinous (quadriceps tendon) and independent attachments to base of patella
  • Indirectly via patellar ligament to tibial tuberosity
  • Medial and lateral vasti also attach to tibia and patella via aponeuroses (medial and lateral patellar retinacula)
28
Q

What is the innervation for ALL the muscles of the Quadriceps femoris?

A

Femoral nerve (L2, L3, L4)

29
Q

What is the main action for ALL the muscles of the Quadriceps femoris?

A

Extend leg at knee joint; rectus femoris also steadies hip joint and helps iliopsoas flex thigh

30
Q

What are the Adductors of the thigh?

A
  • Adductor Longus
  • Adductor brevis
  • Adductor magnus
  • Gracilis
  • Obturator externus
31
Q

Are the Adductors of the thigh Anterior or Posterior?

A

ANTERIOR!

32
Q

What is the origin (proximal attachment) of the Adductor Longus?

A

Body of pubis inferior to pubic crest

33
Q

What is the insertion (distal attachment) of the Adductor Longus?

A

Middle third of linea aspera of femur

34
Q

What is the main action of the Adductor Longus?

A

Adducts thigh

35
Q

What is the origin (proximal attachment) of the Adductor brevis?

A

Body and inferior ramus of pubis

36
Q

What is the insertion (distal attachment) of the Adductor brevis?

A

Pectineal line and proximal part of linea aspera of femur

37
Q

What is the innervation for both the Adductor Longus and Adductor brevis?

A

Obturator nerve, branch of anterior division (L2, L3, L4)

38
Q

What is the main action of the Adductor brevis?

A

Adducts thigh; to some extent flexes it

39
Q

What is the origin (proximal attachment) of the Adductor magnus?

A
  • Adductor part: Inferior ramus of pubis, ramus of ischium

- Hamstrings part: ischial tuberosity

40
Q

What is the insertion (distal attachment) of the Adductor magnus?

A
  • Adductor part: gluteal tuberosity, linea apsera, medial supracondylar line
  • Hamstrings part: adductor tubercle of femur
41
Q

What is the innervation for both the Adductor magnus?

A
  • Adductor part: Obturator nerve, branch of posterior division (L2, L3, L4)
  • Hamstrings part: tibial part of sciatic nerve
42
Q

What is the main action of the Adductor magnus?

A
  • adducts thigh
  • Adductor part: flexes thigh
  • Hamstrings part: extends thigh
43
Q

What is the origin (proximal attachment) of the Gracilis?

A

Body and inferior ramus of pubis

44
Q

What is the insertion (distal attachment) of the Gracilis?

A

Supeior part of medial surface of tibia

45
Q

What is the innervation for both the Gracilis?

A

Obturator nerve (L2, L3)

46
Q

What is the main action of the Gracilis?

A
  • Adducts thigh
  • Flexes leg
  • helps rotate leg medially
47
Q

What is the origin (proximal attachment) of the Obturator Externus?

A

Margins of obturator foramen and obturator membrane

48
Q

What is the insertion (distal attachment) of the Obturator Externus?

A

Trochanteric fossa of femur

49
Q

What is the innervation for the Obturator Externus?

A

Obturator nerve (L3, L4)

50
Q

What is the main action of the Obturator Externus?

A

Laterally rotates thigh; steadies head of femur in acetabulum

51
Q

What are the Extensors of the Hip and Flexors of the Knee?

A
  • Semitendinosus
  • Semimembranosus
  • Biceps Femoris
52
Q

Are the Extensors of the Hip and Flexors of the Knee Anterior or Posterior?

A

POSTERIOR!

53
Q

What is the origin (proximal attachment) of both the Semitendinosus and the Semimembranosus?

A

Ischial Tuberosity

54
Q

What is the insertion (distal attachment) of the Semitendinosus?

A

Medial surface of superior part of tibia

55
Q

What is the insertion (distal attachment) of the Semimembranosus?

A
  • Posterior part of medial condyle of tibia

- Reflected attachment forms oblique popliteal ligament (to lateral femoral condyle)

56
Q

What is the innervation for both the Semitendinosus and the Semimembranosus?

A

Tibial division of sciatic nerve (L5, S1, S2)

57
Q

What is the main action of the both the Semitendinosus and the Semimembranosus?

A
  • Extend thigh
  • Flex leg and rotate it medially when knee is flexed
  • When thigh and leg are flexed, they can extend the trunk
58
Q

What is the origin (proximal attachment) of the Biceps Femoris?

A
  • Long head: Ischial Tuberosity

- Short head: Linea aspera and lateral supracondylar line of femur

59
Q

What is the insertion (distal attachment) of the Biceps Femoris?

A
  • Lateral side of head of fibula

- tendon is split at this site by fibular collateral ligament of knee

60
Q

What is the innervation for the Biceps Femoris?

A
  • Long head: tibial division of sciatic nerve (L5, S1, S2)

- Short head: common fibular division of sciatic nerve (L5, S1, S2)

61
Q

What is the main action of the Biceps Femoris?

A
  • Flexes leg and rotates it laterally when knee is flexed

- extends thigh

Anatomy Exam 3 (5 decks)

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