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MSK II (Histology) > Lower Extremity (Muscles) > Flashcards

Lower Extremity (Muscles) Flashcards

1
Q

What Muscles make up Iliopsoas M? (Chief Flexor of Thigh)

A

Iliacus and Psoas Major/Minor

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2
Q

What is the Origin/Insertion of Iliacus?

A

O: Superior Iliac Fossa, Ala of Sacrum, and Ant. Sacroiliac L.

I: Lesser Trochanter

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3
Q

What is the Innervation of Iliacus?

A

Femoral N. (L2-L3)

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4
Q

What is the Blood Supply of Iliacus?

A

Medial Femoral Circumflex A. and Iliolumbar A.

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5
Q

What is the Action of Iliacus?

A

Flexes Thigh / Stabilizes Hip Joint

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6
Q

What is the Origin/Insertion of Psoas Major?

A

T12-15 Vert. / Lesser Trochanter of Femur

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7
Q

What is the Innervation of Psoas Major?

A

Ant. Rami of L1 - L3

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8
Q

What is the Blood Supply of Psoas Major?

A

Iliolumbar A.

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9
Q

What is the Action of Psoas Major?

A

Flexes Thigh / Laterally flex VC / Flex Trunk

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10
Q

What is the Origin/Insertion of Sartorius?

A

ASIS / Pes Anserinus

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11
Q

What is the Innervation of Sartorius?

A

Femoral N. (L2-L3)

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12
Q

What is the Blood Supply of Sartorius?

A

Femoral A.

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13
Q

What is the Action of Sartorius?

A

Flex/ Abduct/ laterally rotate thigh (Flex Leg at Knee)

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14
Q

What 4 Muscles make up the Quadriceps Femoris M.?

What do they do?

What do they form at the end?

A

Rectus Femoris m. / Vastus Lateralis m. / Vastus Medialis m. / Vastus Intermedius m.

Primary Leg EXTENDERS!

all 4 muscles give off a tendon that forms the Quadriceps Tendon

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15
Q

What is the Origin/Insertion of Rectus Femoris?

A

ASIS / Tibial Tuberosity

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16
Q

What is the Innervation of Rectus Femoris?

A

Femoral N. (L2-L3)

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17
Q

What is the Blood Supply of Rectus Femoris?

A

Lateral Femoral Circumflex A.

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18
Q

What is the Action of Rectus Femoris?

A

Extend Leg / Flexes Thigh

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19
Q

What is the Origin/Insertion of Vastus Lateralis?

A

Shaft of Femur / Tibial Tuberosity

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20
Q

What is the Innervation of Vastus Lateralis?

A

Femoral N. (L2-L3)

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21
Q

What is the Blood Supply of Vastus Lateralis?

A

Femoral A.

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22
Q

What is the Action of Vastus Lateralis?

A

Extend Leg (at knee)

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23
Q

What is the Origin/Insertion of Vastus Medialis?

A

Shaft of Femur / Tibial Tuberosity

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24
Q

What is the Innervation of Vastus Medialis?

A

Femoral N. (L2-L3)

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25
Q

What is the Blood Supply of Vastus Medialis?

A

Femoral A.

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26
Q

What is the Action of Vastus Medialis?

A

Extend Leg (at knee)

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27
Q

What is the Origin/Insertion of Vastus Intermedius?

A

Shaft of Femur / Tibial Tuberosity

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28
Q

What is the Innervation of Vastus Intermedius?

A

Femoral N. (L2-L3)

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29
Q

What is the Blood Supply of Vastus Intermedius?

A

Femoral A.

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30
Q

What is the Action of Vastus Intermedius?

A

Extend Leg (at Knee)

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31
Q

What is the Origin/Insertion of Pectineus?

A

Pecten Line of Pubis / Pectineal Line (inf. to Lesser Trochanter)

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32
Q

What is the Innervation of Pectineus?

A

Femoral N (L2-L3) ( and occasionally Obturator N) (L2-L4)

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33
Q

What is the Blood Supply of Pectineus?

A

Obturator A.

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34
Q

What is the Action of Pectineus?

A

Adduct and Flex Thigh

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35
Q

What is the Origin/Insertion of Adductor Longus m.?

A

Body of Pubis (inf. to Pubic Crest) / Middle 1/3 of Linea Aspera

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36
Q

What is the Innervation of Adductor Longus m.?

A

Obturator N (L2-L4)

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37
Q

What is the Blood Supply of Adductor Longus m.?

A

Deep Femoral A.

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38
Q

What is the Action of Adductor Longus m.?

A

Adduct and Flex Thigh

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39
Q

What is the Origin/Insertion of Adductor Brevis m.?

A

Pubis Body & Inferior Ramus / Proximal Linea Aspera

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40
Q

What is the Innervation of Adductor Brevis m.?

A

Obturator N. (L2 - L4)

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41
Q

What is the Blood Supply of Adductor Brevis m.?

A

Deep Femoral A.

42
Q

What is the Action of Adductor Brevis m.?

A

Adduct / Flex Thigh

43
Q

What is the Origin/Insertion of Adductor Magnus M.?

A

Adductor Part = Ischial Tuberosity / Gluteal Tuberosity - Linea Aspera - Medial Supracondylar Line
Hamstring Part = Ischiopubic Ramus / Medial Epicondyle

44
Q

What is the Innervation of Adductor Magnus m.?

A

Adductor Part = Obturator N. (L2 - L4)

Hamstring Part = Tibial Part of Sciatic N. (L4)

45
Q

What is the Blood Supply of Adductor Magnus m.?.?

A

both - Deep Femoral A.

46
Q

What is the Action of Adductor Magnus m.?

A

Adductor Part = Adduct and Flex Thigh

Hamstring Part = Adduct and Extend Thigh

47
Q

What is the Origin/Insertion of Gracilis m.?

A

Inferior Ramus of Pubis / Superior Part of Medial Tibial Surface

48
Q

What is the Innervation of Gracilis m.?

A

Obturator N. (L2-L4)

49
Q

What is the Blood Supply of Gracilis m?

A

Medial Circumflex Femoral A.

50
Q

What is the Action of Gracilis m.?

A

Adduct Thigh / Flexes & Medially Rotate Leg

51
Q

What is the Origin/Insertion of Obturator Externus m.?

A

External Margins of Obturator Foramen / Trochanteric Fossa

52
Q

What is the Innervation of Obturator Externus m.?

A

Obturator N. (L2-L4)

53
Q

What is the Blood Supply of Obturator Externus m.?

A

Obturator A.

54
Q

What is the Action of Obturator Externus m.?

A

Laterally Rotate Thigh (Stabilizes Femoral Head)

55
Q

What is the Origin/Insertion of Gluteus Maximus m.?

A

Ilium Posterior to posterior Gluteal Line, Dorsal sacrum and Coccyx, Sacrotuberous L.

Gluteal Tuberosity , Lateral Tibial Condyle (via Iliotibial Tract)

56
Q

What is the Innervation of Gluteus Maximus m.?

A

Inferior Gluteal N. (L5, S1, S2)

57
Q

What is the Blood Supply of Gluteus Maximus m.?

A

Inferior Gluteal A.

58
Q

What is the Action of Gluteus Maximus m.?

A

Extends Thigh, assists in Lateral Rot.

59
Q

What is the Origin/Insertion of Gluteus Medius m.?

A

Ilium Between Anterior and Posterior Gluteal Lines /

Lateral aspect Greater Trochanter of Femur

60
Q

What is the Innervation of Gluteus Medius m.?

A

Superior Gluteal N. (L4 - S1)

61
Q

What is the Blood Supply of Gluteus Medius m.?

A

Superior Gluteal A.

62
Q

What is the Action of Gluteus Medius m.?

A

Abduct and Medially Rotate Thigh

63
Q

What is the Origin/Insertion of Gluteus Minimus m.?

A

Ilium Between Anterior and Posterior Gluteal Lines

Anterior aspect Greater Trochanter of Femur

64
Q

What is the Innervation of Gluteus Minimus m.?

A

Superior Gluteal N (L4-S1)

65
Q

What is the Blood Supply of Gluteus Minimus m.?

A

Superior Gluteal A.

66
Q

What is the Action of Gluteus Minimus m.?

A

Abduct and Medially Rotate Thigh

67
Q

What is the Origin/Insertion of Tensor Fascia Lata m.?

A

ASIS, Anterior aspect Iliac Crest

Iliotibial Tract and Lateral Tibial condyle via Iliotibial Tract

68
Q

What is the Innervation of Tensor Fascia Lata m.?

A

Superior Gluteal N. (L4-S10

69
Q

What is the Blood Supply of Tensor Fascia Lata m.?

A

Lateral circumflex femoral a. & superior gluteal a.

70
Q

What is the Action of Tensor Fascia Lata m.?

A

Abduct, Medially Rotate, and Flex Thigh (Maintains Extended Leg)

71
Q

What is the Origin/Insertion of Piriformis m.?

A

Anterior Surface of the Sacrum (S2-4), Sacrotuberous L.

Superior Aspect Greater Trochanter of Femur

72
Q

What is the Innervation of Piriformis m.?

A

Nerve to Piriformis m. (S1-S2)

73
Q

What is the Blood Supply of Piriformis m.?

A

Gluteal A. and Lateral Sacral A.

74
Q

What is the Action of Piriformis m.?

A

Laterally Rotate and Extended Thigh

Abduct FLEXED Thigh, Stabilize Femoral Head in Acetabulum.

75
Q

What is the Origin/Insertion of Superior Gemellus m.?

A

Ischial Spine / Medial Aspect Greater Trochanter of Femur

76
Q

What is the Innervation of Superior Gemellus m.?

A

Nerve to the Obturator Internus m. (L5-S2)

77
Q

What is the Blood Supply of Superior Gemellus m.?

A

Inferior Gluteal A.

78
Q

What is the Action of Superior Gemellus m.?

A

Laterally Rotate Extended Thigh

Abduct Flexed Thigh and Stabilize Femoral Head in Acetabulum

79
Q

What is the Origin/Insertion of Inferior Gemellus m.?

A

Ischial Tuberosity / Medial Aspect Greater Trochanter of Femur

80
Q

What is the Innervation of Inferior Gemellus m.?

A

Nerve to Quadratus Femoris m. (L4 - S1)

81
Q

What is the Blood Supply of Inferior Gemellus m.?

A

Inferior Gluteal A.

82
Q

What is the Action of Inferior Gemellus m.?

A

Laterally Rotate Extended Thigh

Abduct Flexed Thigh and Stabilize Femoral Head in Acetabulum

83
Q

What is the Origin/Insertion of Quadratus Femoris m.?

A

Lateral Aspect Ischial Tuberosity / Quadrate Tubercle on Intertrochanteric Crest

84
Q

What is the Innervation of Quadratus Femoris m.?

A

Obturator N. (L2-L4)

85
Q

What is the Blood Supply of Quadratus Femoris m.?

A

Inferior Gluteal A.

86
Q

What is the Action of Quadratus Femoris m.?

A

Laterally Rotate Thigh / Stabilize Femoral Head in Acetabulum

87
Q

What is the Origin/Insertion of Obturator Internus m.?

A

Pelvic Surfaces of Ilium and Ischium and Obturator Membrane

Greater Trochanter of Femur

88
Q

What is the Innervation of Obturator Internus m?

A

Nerve to Obturator Internus m. (L5-S2)

89
Q

What is the Blood Supply of Obturator Internus m?

A

Superior Gluteal A.

90
Q

What is the Action of Obturator Internus m.?

A

Laterally Rotate Extended Thigh

Abduct Flexed Thigh, and Stabilize femoral head in Acetabulum

91
Q

What is the Origin/Insertion of Biceps Femoris m.?

A

Long: Ischial Tuberosity / Lateral Aspect Fibular Head

Short: Linea Aspera and Lateral Supracondylar Line / Lateral Aspect Fibular Head

92
Q

What is the Innervation of Biceps Femoris m.?

A

Long: Tibial Division of Sciatic N.
Short: Common Fibular Division of Sciatic N.

93
Q

What is the Blood Supply of Biceps Femoris m.?

A

Perforating arteries of profunda femoris and superior muscular branch of popliteal artery

94
Q

What is the Action of Biceps Femoris m.?

A

BOTH: Flex and Laterally Rotate Leg (When Flexed)
Long: Extends Thigh

95
Q

What is the Origin/Insertion of Semitendinosus m.?

A

Ischial Tuberosity / Pes Anserinus

96
Q

What is the Innervation of Semitendinosus m.?

A

Tibial Division of Sciatic N.

97
Q

What is the Blood Supply of Semitendinosus m.?

A

Perforating arteries of Deep Femoris

98
Q

What is the Action of Semitendinosus m.?

A

Extend Thigh, Flex and Medially Rotate Leg when Flexed

99
Q

What is the Origin/Insertion of Semimembranosus m.?

A

Ischial Tuberosity / Posterior Aspect medial tibial condyle

100
Q

What is the Innervation of Semimembranosus m.?

A

Tibial Division of Sciatic N.

101
Q

What is the Blood Supply of Semimembranosus m.?

A

Perforating arteries of Deep Femoris

102
Q

What is the Action of Semimembranosus m.?

A

Extend Thigh, Flex and Medially Rotate Leg when Flexed

MSK II (Histology) (4 decks)

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