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Anatomy of the Leg > Muscles of the Gluteal Region > Flashcards

Muscles of the Gluteal Region Flashcards

1
Q

O/I of psoas major

A

Origin- transverse processes of all lumbar vertebrae + T12

Insert- lesser trochanter of the femur, medial to the insertion of the iliacus

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2
Q

innervation of psoas major

A

lumbar plexus L2-L3

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3
Q

function of psoas major

A

flexor at the hip

flexor of the lumbar spine

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4
Q

O/I of psoas minor

A

(inconstant muscle found on the anterior surface of the psoas major)
Origin- T12 and L1 vertebrae
insertion- iliac fascia

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5
Q

innervation of psoas minor

A

first lumbar nerve

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6
Q

function of psoas minor

A

flexion of lumbar spine

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7
Q

O/I of iliacus

A

origin- upper 2/3 of iliac fossa; iliac crest reachin ASIS and AIIS, superolateral portion of sacrum and from the anterior sacroiliac and iliolumbar ligaments

insertion- lesser trochanter of the femur

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8
Q

what structures attach to the lesser trochanter of the femur?

A

psoas major- more medial
iliacus
(together, it is the iliopsoas)

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9
Q

innervation of the iliacus

A

femoral nerve

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10
Q

action of the iliacus

A

flexion at the hip

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11
Q

O/I of gluteus maximus

A

origin- posterior gluteal line of the ilium and the bone superior and posterior to it; sacrotuberous ligament; aponeurosis of the sacrospinalis muscle

inserts- gluteal tuberosity (deep fibers) and IT band (proximal and superficial fibers)

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12
Q

innervation of gluteus maximus

A

inferior gluteal nerve (L5-S2)

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13
Q

function of gluteus maximus

A

extend, laterally rotates and abducts the thigh at the hip

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14
Q

O/I gluteus medius

A

origin- in between the posterior gluteal line and the anterior gluteal line
insertion- oblique bony ridge on the lateral surface of the greater trochanter

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15
Q

innervation of gluteus medius

A

superior gluteal nerve

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16
Q

function of gluteus medius

A

abductor of thigh
medially rotates an extended hip
stabilizes pelvis during locomotion

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17
Q

what lies in between the gluteus medius and minimus?

A

superior gluteal nerve

and the deep branches of the superior gluteal artery and veins

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18
Q

O/I of gluteus minimus

A

origin- in btwn the anterior and ifnerior gluteal lines and from the edge of the greater sciatic notch

insertion- anterior border of greater trochanter

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19
Q

innervation of gluteus minimus

A

superior gluteal nerve

20
Q

the superior gluteal nerve innervates which gluteal muscles?

A

gluteus medius and minimus

*note that the gluteus maximus is innervated by INFERIOR gluteal nerve

21
Q

function of gluteus minimus

A

abductor at the hip
medially rotates an extended hip (and is a weak hip flexor)
stabilizes the pelvis during locomotion

22
Q

O/I of tensor fascia latae

A

origin- anterior end of the iliac crest near the ASIS

insertion- IT band

23
Q

innervation of tensor fascia latae

A

superior gluteal nerve

24
Q

function of tensor fascia latae

A

hip flexor and medial rotator

25
Q

O/I of piriformis

A

origin- anterior surface of the sacrum btwn the 1st-4th sacral foramina
insertion- superior border of the greater trochanter, posterior to the common tendon of the obturator internus and gemelli

26
Q

innervation of piriformis

A

2nd or 1st and 2nd sacral nerves

27
Q

action of piriformis

A

lateral rotator, abductor of a flexed hip

assists in extension at the hip

28
Q

O/I of obturator internus

A

origin- inside surface fo the superior and inferior pubic rami, the ischial ramus, the ilial and ischial contributions to the wall of the true pelvis and the obturator mb

insertion- medial surface of the greater trochanter of femur

29
Q

innervation of obturator internus

A

nerve to obturator internus (L5-S1,2)

30
Q

function of obturator internus

A

lateral rotator, extensor of the hip

abducts a flexed hip

31
Q

the superior and inferior gemelli lie on either side of what muscle?

A

obturator internus

32
Q

O/I of superior gemellus

A

origin- outer surface of the ischial spine

insertion- medial surface of greater trochanter

33
Q

innervation of superior gemellus?

A

nerve to obturator internus

34
Q

function of superior gemellus

A

lateral rotator of the hip

35
Q

O/I of inferior gemellus

A

origin- upper (superomedial) part of the ischial tuberosity

insertion- medial surface of greater trochanter

36
Q

innervation of inferior gemellus

A

nerve to quadratus femoris

37
Q

function of inferior gemelus

A

lateral rotator of hip

38
Q

what muscle is found in between the ifnerior gemellus and the upper fibers of teh adductor magnus?

A

quadratus femoris

39
Q

O/I of quadratus femoris

A

origin- lateral edge of ischial tuberosity

insertion- linea quadrata and quadrate tubercle of the femur

40
Q

innervation of quadratus femoris

A

nerve to quadratus femoris (L4-S1)

41
Q

what nerve roots is nerve to quadratus femoris?

A

L4-S1

42
Q

function of quadratus femoris?

A

adducts and laterally rotates the hip

43
Q

O/I of obturator externus?

A

origin-ischium and pubis which surround the medial margin of the obturator foramen and from the obturator mb
insertion- trochanteric fossa of the femur

44
Q

innervation of obturator externus

A

posterior division of the obturator nerve

45
Q

function of obturator externus

A

adducts and laterally rotates the hip

Anatomy of the Leg (12 decks)

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