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Anatomy > O & I: Gluteal Region Muscles > Flashcards

O & I: Gluteal Region Muscles Flashcards

1
Q

Origin: Gluteus Maximus

A

Ilium posterior to posterior gluteal line; dorsal surface of sacrum and coccyx; sacrotuberous ligament

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2
Q

Insertion: Gluteus Maximus

A

most fibers end in iliotibial tract; some fibers insert on gluteal tuberosity

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3
Q

Innervation: Gluteus Maximus

A

inferior gluteal nerve (L5, S1, S2)

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4
Q

Action: Gluteus Maximus

A

extends thigh (especially from flexed postion) and assits in its lateral rotation; steadies thigh and assits in rising from sitting position

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5
Q

Origin: Gluteus Medius

A

external surface of ilium between anterior and posterior gluteal lines

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6
Q

Insertion: Gluteus Medius

A

lateral surface of greater trochanter of femur

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7
Q

Innervation: Gluteus Medius

A

Superior gluteal nerve (L5, S1)

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8
Q

Action: Gluteus Medius

A

Abduct and medially rotate thigh; keep pelvis level when ipsilateral limb is weight bearing and advance oppposite (unsupported) side during its swing phase

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9
Q

Origin: Gluteus Minimus

A

external surface of ilium between anterior and inferior gluteal lines

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10
Q

Insertion: Gluteus Minimus

A

Anterior surface of greater trochanter of femor

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11
Q

Innervation: Gluteus Minimus

A

Superior gluteal nerve (L5, S1)

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12
Q

Action: Gluteus Minimus

A

Abduct and medially rotate thigh; keep pelvis level when ipsilateral limb is weight bearing and advance oppposite (unsupported) side during its swing phase

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13
Q

Origin: Tensor Fasciae Latae

A

anterior superior iliac spine; anterior part of iliac crest

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14
Q

Insertion: Tensor Fasciae Latae

A

iliotibial tract, which attaches to lateral condyle of tibia

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15
Q

Innervation: Tensor Fasciae Latae

A

Superior gluteal nerve (L5, S1)

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16
Q

Action: Tensor Fasciae Latae

A

Abduct and medially rotate thigh; keep pelvis level when ipsilateral limb is weight bearing and advance oppposite (unsupported) side during its swing phase

17
Q

Origin: Piriformis

A

anterior surface of sacrum; sacrotuberous ligament

18
Q

Insertion: Piriformis

A

superior border of greater trochanter of femur

19
Q

Innervation: Piriformis

A

n. to piriformis (S1 and S2)

20
Q

Action: Piriformis

A

laterally rotate extend thigh and abduct flexed thigh; steady femoral head in acetablulum

< 90 = external rotation
> 90 = Internal rotation

21
Q

Origin: Obturator Internus

A

pelvic surface of obturator membrane and surrounding bones

22
Q

Insertion: Obturator Internus

A

medial surface of greater trochanter (trochanteric fossa) of femur

23
Q

Innervation: Obturator Internus

A

nerve to obturator internus (L5, S1)

24
Q

Action: Obturator Internus

A

laterally rotate extend thigh and abduct flexed thigh; steady femoral head in acetablulum

25
Q

Origin: Superior Gemelli

A

Ischial spine

26
Q

Insertion: Superior Gemelli

A

medial surface of greater trochanter (trochanteric fossa) of femur

27
Q

Innervation: Superior Gemelli

A

nerve to obturator internus (L5, S1)

28
Q

Action: Superior Gemelli

A

laterally rotate extend thigh and abduct flexed thigh; steady femoral head in acetablulum

29
Q

Origin: Inferior Gemelli

A

Ischial tuberosity

30
Q

Insertion: Inferior Gemelli

A

medial surface of greater trochanter (trochanteric fossa) of femur

31
Q

Innervation: Inferior Gemelli

A

nerve to quadratus femoris (L5, S1)

32
Q

Action: Inferior Gemelli

A

laterally rotate extend thigh and abduct flexed thigh; steady femoral head in acetablulum

33
Q

Origin: Quadratus Femoris

A

lateral border of ishial tuberosity

34
Q

Insertion: Quadratus Femoris

A

quadrate tubercle on intertrochanteric crest of femur and area inferior to it

35
Q

Innervation: Quadratus Femoris

A

nerve to quadratus femoris (L5, S1)

36
Q

Action: Quadratus Femoris

A

Laterally rotates thigh; steadies femoral head in acetabulum

37
Q

Origin: Iliotibial tract

A

Iliac crest

38
Q

Insertion: Iliotibial tract

A

lateral condyle of tibia

Anatomy (25 decks)

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