Lecture 11: Gluteal Region Flashcards

1
Q

gluteus maximus attachments

A

medial: inferior to posterior gluteal line of ilium, sacrum and sacrotuberous ligament
lateral: gluteal tuberosity and iliotibial tract

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2
Q

gluteus maximus innervation

A

inferior gluteal n.

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3
Q

gluteus maximus actions

A

hip extension; assists lateral rotators

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4
Q

gluteus medius attachments

A

medial: ilium between anterior and posterior gluteal lines
lateral: greater trochanter

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5
Q

gluteus medius innervation

A

superior gluteal n.

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6
Q

gluteus medius actions

A

abduction and medial rotation of hip; supports the contralateral pelvis during the swing phase of walking

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7
Q

piriformis attachments

A

medial: anteriolateral surface of sacrum and sacrotuberous ligament
distal: greater trochanter

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8
Q

piriformis innervation

A

n. to piriformis

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9
Q

piriformis actions

A

abduction of flexed femur; lateral rotation of extended femur

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10
Q

these structures emerge from the greater sciatic foramen superior to piriformis

A
  • n. to piriformis
  • superior gluteal n.
  • superior gluteal a.
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11
Q

these structures emerge from greater sciatic foramen inferior to piriformis

A
  • sciatic n.
  • inferior gluteal n.
  • inferior gluteal a.
  • posterior gluteal a.
  • n. to obturator internus
  • internal pudendal a.
  • pudendal n.
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12
Q

gluteus minimus attachments

A

medial: between anterior and inferior gluteal lines
lateral: greater trochanter

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13
Q

gluteus medius innervation

A

superior gluteal n.

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14
Q

gluteus medius actions

A

abduction and medial rotation of thigh

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15
Q

superior gemellus attachments

A

medial: spine of ischium
lateral: tendon of obturator internus m.

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16
Q

superior gemellus innervation

A

n. to obturator internus

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17
Q

superior gemellus actions

A

abduction of flexed femur; lateral rotation of extended femur

18
Q

inferior gemellus attachments

A

medial: ischial tuberosity
lateral: tendon of obturator internus m.

19
Q

inferior gemellus innervation

A

n. to quadratus femoris

20
Q

inferior gemellus actions

A

abduction of flexed femur; lateral rotation of extended femur

21
Q

obturator internus attachments

A

medial: internal surface of obturator membrane and borders of obturator foramen
lateral: greater trochanter

22
Q

obturator internus innervation

A

n. to obturator internus

23
Q

obturator internus actions

A

abduction of flexed femur; lateral rotation of extended femur

24
Q

quadratus femoris attachments

A

medial: ischial tuberosity
lateral: quadratus tubercle

25
quadratus femoris innervation
n. to quadratus femoris
26
quadratus femoris actions
lateral rotation of hip
27
branches of sciatic n.
1. common fibular n. 2. tibial n.
28
n. to piriformis
supplies piriformis
29
posterior femoral cutaneous
supplies skin of inferior gluteal region and posterior thigh
30
superior gluteal n.
supplies gluteus medius, gluteus minimus and tensor fascia lata
31
inferior gluteal n.
supplies gluteus maximus
32
n. to quadratus femoris
supplies inferior gemellus and quadratus femoris
33
superior gluteal a.
branch of internal iliac a. ; supplies piriformis and all three gluteal mm.; contributes to hip joint anastamosis
34
inferior gluteal a.
branch of internal iliac a. ; supplies piriformis and mm. inferior to piriformis, part of gluteus maximus and hamstrings
35
internal pudendal a.
branch of internal iliac a.; accompanies pudendal n. in its course to perineum; supplies perineal structures
36
positive trendelenburg test/sign
when a person is asked to stand on one leg, the pelvis on the unsupported side descends indicating that gluteus medius and minimus on the *supported* side are weak or non functional
37
During recovery from a gunshot wound of the right pelvis, the patient notices a lurch in his gait. When he lifts his left foot off of the ground, his pelvis dips down on the left side. The nerve that appears to have been injured is the:
superior gluteal n.
38
If the head of the femur is dislocated postero-medially, compression of which nerve is likely to result?
sciatic n.
39
What muscle passes through the lesser sciatic foramen?
obturator internus m.
40
As a patient with paralyzed gluteus medius and minimus muscles on the left side attempts to stand on the left limb only, the right side of the pelvis typically:
drops
41
An elderly patient complains of difficulty in walking up stairs. Tests by her doctor reveal weakness in extension at her hip, but no change in hip flexion, or flexion or extension of the knee. Based upon these results, what muscle is most likely not functioning properly.
gluteus maximus
42
The medial thigh muscles rotate the femur medially, counterbalanced by muscles of the _____________ thigh, including the ___________ muscle, which rotates the femur laterally.
lateral; piriformis