Buttocks Flashcards

1
Q

Tensor Fascia Latae origin

A

Anterolateral superior iliac spine

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2
Q

Tensor Fascia Latae insertion

A

Iliotibial band (and thus Gerdys tubercle)

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3
Q

Tensor Fascia Latae action

A

Assist flexion, abduction, and internal rotation of the thigh, tense fascia lata

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4
Q

Tensor Fascia Latae innervation and spinal level

A

Superior gluteal (L4-S1)

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5
Q

Gluteus Maximus origin

A

Posterlateral sacrum, gluteal surface of posterior ilium, thoracolumbar fascia, and sarotuberous ligament

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6
Q

Gluteus Maximus insertion

A

Iliotibial band and gluteal tuberosity

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7
Q

Gluteus Maximus action

A

Extension, external rotation
Also:
upper fibers- abduction
Lower fibers- assist adduction at hip

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8
Q

Gluteus Maximus innervation and spinal level

A

Inferior gluteal L5-S2

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9
Q

Gluteus medius origin

A

Upper/ outer surface of the ilium

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10
Q

Gluteus medius insertion

A

Greater trochanter (lateral surface)

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11
Q

Gluteus medius action

A

Abduct thigh
In addition:
anterior part-assist in internal rotation;may assist flexion of thigh
Posterior part- assists external rotation and extension of thigh

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12
Q

Gluteus medius innervation and spinal level

A

Superior gluteal L4-S1

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13
Q

Gluteus minimus origin

A

Outer middle surface of the ilium

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14
Q

Gluteus minimus insertion

A

Greater trochanter (anterolateral surface)

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15
Q

Gluteus minimus action

A

Abduct thigh
In addition:
Anterior part- assist internal rotation; may assist flexion of thigh
Posterior part- assist external rotation and extension of thigh

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16
Q

Gluteus minimus innervation and spinal level

A

Superior gluteal L4-S1)

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17
Q

Piriformis origin

A

Anterolateral (pelvic) surface of the sacrum

18
Q

Piriformis insertion

A

Great trochanter (apex)

19
Q

Piriformis action

A

External rotate thigh (in neutral); abduct thigh when at least slightly flexed (= horizontal abduction), extend hip, IR (when hip flexed past 60)

20
Q

Piriformis innervation and spinal level

A

Nerve to piriformis S1-2

21
Q

Obturator internus origin

A

Internal (pelvic) side of obturator foremen and membrane

22
Q

Obturator internus insertion

A

Greater trochanter (medial surface)

23
Q

Obturator internus action

A

External rotation of thigh, adduction, extension, (can help abduction depending on hips position)

24
Q

Obturator internus innervation and spinal level

A

Nerve to obturator internus L5-S1

25
Q

Superior gemellus origin

A

Ischial spine

26
Q

Superior gemellus insertion

A

Greater trochanter (via obturator internus tendon)

27
Q

Superior gemellus action

A

External rotation of thigh, adduction, extension, (can help abduction depending on hips position)

28
Q

Superior gemellus innervation and spinal level

A

Nerve to gemellus superior L5-S1

29
Q

Inferior gemellus origin

A

Ischial tuberosity

30
Q

Inferior gemellus insertion

A

Greater trochanter (via obturator internus tendon)

31
Q

Inferior gemellus action

A

External rotation of thigh, adduction, extension, (can help abduction depending on hips position)

32
Q

Inferior gemellus innervation and spinal level

A

Nerve to gemellus inferior L5-S1

33
Q

Quadratus femoris origin

A

Ischial tuberosity (lateral border)

34
Q

Quadratus femoris insertion

A

Intertrochanteric crest (quadrate tubercle), lesser trochanter

35
Q

Quadratus femoris action

A

External rotation and adduction of thigh

36
Q

Quadratus femoris innervation and spinal level

A

Nerve to quadratus femoris L5-S1

37
Q

Obturator externus origin

A

Outer (external) margin of obturator foremen and membrane

38
Q

Obturator externus insertion

A

Trochanteric fossa

39
Q

Obturator externus action

A

External rotation; adduction of thigh

40
Q

Obturator externus innervation and spinal level

A

Branch of obturator L3-4