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Gross Anatomy Muscles > Posterior Hip and Thigh Muscles > Flashcards

Posterior Hip and Thigh Muscles Flashcards

1
Q

Gluteus Maximus

Origin

A
  • Ilium posterior to posterior gluteal line
  • dorsal surface of sacrum and coccyx
  • sacrotuberous ligament
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2
Q

Gluteus Maximus

Insertion

A

-Iliotibial tract (which inserts into lateral condyle
of tibia)
-gluteal tuberosity

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3
Q

Gluteus Maximus

Innervation

A

-Inferior gluteal nerve (L5, S1, S2)

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4
Q

Gluteus Maximus

Action

A
  • Extends hip joint (especially from flexed position)

- Laterally rotates hip joint

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5
Q

Gluteus Medius

Origin

A

-External surface of ilium between anterior and posterior gluteal lines

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6
Q

Gluteus Medius

Insertion

A

-Greater trochanter of femur

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7
Q

Gluteus Medius

Innervation

A

-Superior gluteal nerve (L5, S1)

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8
Q

Gluteus Medius

Action

A
  • Abducts and medially rotates hip joint
  • Keeps pelvis level when ipsilateral limb is weightbearing and advancing opposite (unsupported) limb during swing phase of gait
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9
Q

Gluteus Minimus

Origin

A

-External surface of ilium between anterior and

inferior gluteal lines

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10
Q

Gluteus Minimus

Insertion

A

-Greater trochanter of femur

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11
Q

Gluteus Minimus

Innervation

A

-Superior gluteal nerve (L5, S1)

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12
Q

Gluteus Minimus

Action

A
  • Abducts and medially rotates hip joint
  • Keeps pelvis level when ipsilateral limb is weightbearing and advancing opposite (unsupported) limb during swing phase of gait
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13
Q

Piriformis

Origin

A
  • Anterior surface of sacrum

- sacrotuberous ligament

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14
Q

Piriformis

Insertion

A

-Superior border of greater trochanter of femur

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15
Q

Piriformis

Innervation

A

-Branches of anterior rami of S1, S2

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16
Q

Piriformis

Action

A
  • Laterally rotates extended hip and abducts flexed hip

- Steadies femoral head in acetabulum

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17
Q

Obturator Internus

Origin

A

-Posterior surface of obturator membrane and

surrounding bones

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18
Q

Obturator Internus

Insertion

A
  • Medial surface of greater trochanter (trochanteric

fossa) of femur

19
Q

Obturator Internus

Innervation

A

-Nerve to obturator internus (L5, S1)

20
Q

Obturator Internus

Action

A
  • Laterally rotates extended hip and abducts flexed hip

- Steadies femoral head in acetabulum

21
Q

Superior Gemellus

Origin

A

-Ischial spine

22
Q

Superior Gemellus

Insertion

A
  • Medial surface of greater trochanter (trochanteric

fossa) of femur

23
Q

Superior Gemellus

Innervation

A

-Nerve to obturator internus (L5, S1)

24
Q

Superior Gemellus

Action

A
  • Laterally rotates extended hip and abducts flexed hip

- Steadies femoral head in acetabulum

25
Inferior Gemellus | Origin
-Ischial tuberosity
26
Inferior Gemellus | Insertion
- Medial surface of greater trochanter (trochanteric | fossa) of femur
27
Inferior Gemellus | Innervation
-Nerve to quadratus femoris (L5, S1)
28
Inferior Gemellus | Action
- Laterally rotates extended hip and abducts flexed hip | - Steadies femoral head in acetabulum
29
Quadratus Femoris | Origin
-Lateral border of ischial tuberosity
30
Quadratus Femoris | Insertion
-Quadrate tubercle on intertrochanteric crest of | femur and area inferior to it
31
Quadratus Femoris | Innervation
-Nerve to quadratus femoris (L5, S1)
32
Quadratus Femoris | Action
- -Laterally rotates hip joint | - Steadies femoral head in acetabulum
33
Semitendinosus | Origin
-Ischial tuberosity
34
Semitendinosus | Insertion
-Superior and medial surface of tibia (pes anserine)
35
Semitendinosus | Innervation
-Tibial division of sciatic nerve (L5, S1, S2)
36
Semitendinosus | Action
- Extend hip joint - Flex knee joint - Medially rotate tibia when knee flexed
37
Semimembranosus | Origin
-Ischial tuberosity
38
Semimembranosus | Insertion
- Posterior part of medial condyle of tibia | - reflected attachment forms oblique popliteal ligament (to lateral femoral condyle)
39
Semimembranosus | Innervation
-Tibial division of sciatic nerve (L5, S1, S2)
40
Semimembranosus | Action
- Extend hip joint - Flex knee joint - Medially rotate tibia when knee flexed
41
Biceps Femoris | Origin
-Long head: ischial tuberosity -Short head: linea aspera and lateral supracondylar line of femur
42
Biceps Femoris | Insertion
- Lateral side of head of fibula | - tendon is split at this site by fibular collateral ligament of knee
43
Biceps Femoris | Innervation
-Long head: tibial division of sciatic nerve (L5, S1, S2) -Short head: common fibular division of sciatic nerve (L5, S1, S2)
44
Biceps Femoris | Action
- Flexes knee - Laterally rotates tibia when knee is flexed - Long head extends the thigh

Gross Anatomy Muscles (12 decks)

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