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Anatomy Exam 2 > Muscles of the Hip > Flashcards

Muscles of the Hip Flashcards

1
Q

what are the groups of muscles in the hip

A

superficial

deep

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2
Q

what is the nerve rule for the superficial group

A

innervated by the superior gluteal nerve

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3
Q

what muscle is the exception to the nerve rule

A

gluteus maximum

innervated by the inferior gluteal nerve

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4
Q

muscles of the superficial group

A

gluteus maximus

gluteus medius

gluteus minimus

tensor fascia latae

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5
Q

gluteus maximus has

A

upper fibers and lower fibers

different insertion points

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6
Q

gluteus maximus origin

A

sacrum, ilium, thoracolumbar fascia, sacrotuberous ligament

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7
Q

gluteus maximus insertion points

A

upper fibers: iliotibial tract

lower fibers: gluteal tuberosity

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8
Q

gluteus maximus innervation

A

inferior gluteal nerve (L5,S2)

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9
Q

gluteus maximus actions

A

whole muscle: extends the hip and ER hip (sagittal and coronal planes)

Upper fibers: ABD

lower fibers: ADD

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10
Q

gluteus medius origin

A

ilium (gluteal surface below iliac crest, b/w the anterior and posterior gluteal line)

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11
Q

gluteus medius insertion

A

greater trochanter of the femur (lateral surface)

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12
Q

gluteus medius innervation

A

superior gluteal nerve (L4,S1)

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13
Q

gluteus medius action

A

entire muscle: ABD of the hip, stabilizes the pelvis in the coronal plane

anterior part: flexion and IR

posterior part: EXT and ER

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14
Q

gluteus minimus origin

A

ilium (gluteal surface below the origin of the gluteus medius)

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15
Q

gluteus minimus insertion

A

greater trochanter of the femur (anterolateral surface)

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16
Q

gluteus minimus innervation

A

superior gluteal nerve (L4,S1)

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17
Q

gluteus minimus action

A

whole muscle: ABD of the hip, stabilizes the hip in the coronal plane

anterior part: flexion and IR

posterior part: EXT and ER

18
Q

tensor of fascia latae origin

A

ASIS

19
Q

TFL insertion

A

IT band tract

20
Q

TFL innervation

A

superior gluteal nerve (L4,S1)

21
Q

TFL action

A

tenses the fascia latae

hip joint: ABD, FLEX, IR

22
Q

what are the deep muscles of the hip

A

piriformis

obturator internus

Gemelli

quadratus femoris

23
Q

piriformis origin

A

pelvis surface of the sacrum

24
Q

piriformis insertion

A

apex of the greater trochanter

25
Q

piriformis innervation

A

direct branches from the sacral plexus (S1,S2)

26
Q

piriformis action

A

Hip: ER, ABD, EXT, stabilization

27
Q

obturator internus origin

A

inner surface of the obturator membrane and its bony boundaries

28
Q

obturator internus insertion

A

medial surface of the greater trochanter

29
Q

obturator internus innervation

A

direct branches from the sacral plexus (L5,S1)

nerve to the obturator internus

30
Q

obturator internus action

A

hip: ER, ADD, EXT

31
Q

gemelli origin

A

superior: ischial spine

inferior: ischial tuberosity

32
Q

gemelli insertion

A

jointly w/o obturator internus tendon (medial surface, greater trochanter)

33
Q

gemelli innervation

A

superior: nerve to obturator internus (L5,S1)

inferior: nerve to quadratus femoris (L5,S1)

34
Q

gemelli action

A

hip: ADD, ER, EXT

35
Q

quadratus femoris origin

A

lateral border of the ischial tuberosity

36
Q

quadratus femoris insertion

A

intertrochanteric crest of the femur

37
Q

quadratus femoris innervation

A

nerve to quadratus femoris (L5,S1)

38
Q

quadratus femoris action

A

Hip: ER, ADD

39
Q

Trendelenburg’s sign

A

injury to superior gluteal nerve

causes weakness in gluteus medius and minimus (insufficient small gluteals)

40
Q

what is the effect of the Trendelenburg’s sign

A

side opposite to injury will sag or drop

causes swing leg

Anatomy Exam 2 (24 decks)

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