Gluteal Region Flashcards
What passes through the greater sciatic foramen?
- piriformis m.
- superior gluteal n.a.v.
- inferior gluteal n.a.v.
- pudendal n.
- posterior femoral cutaneous n.
- sciatic n.
- n. to obturator internus and quadratus femoris
What passes through the lesser sciatic foramen?
- obturator internus t.
- n. to obturator internus
- internal pudendal a.v.
- pudedal n.
T/F Extension winds spiraling ll. tightly?
True
T/F Flexion unwinds spiraling ll.?
False
Hip extension is limited to?
10-20% beyond vertical
What are the superficial gluteal muscles?
- gluteus maxims m.
- gluteus medius m.
- gluteus minimus m.
Gluteus Maximus
O: Ilium posterior to posterior gluteal line; dorsum of sacrum and coccyx; sacrotuberous l.
I: IT band (tract) and gluteal tuberosity
A: extension of thing from a flexed position; assist with LR
N: Inferior gluteal n. (L5, S1, S2)
B: Superior and inferior gluteal aa.
Paralysis of gluteus max would affect what?
-climbing NOT walking on level ground
Gluteus Medius
O: Ilium between anterior and posterior gluteal lines
I: lateral surface greater trochanter of femur
A: ABD and MR of thing; keep pelvis level when ipsilateral limb is weight-bearing and advance opposite (unsupported) side during its swing phase
N: Superior gluteal n. (L5, S1)
B: Superior gluteal a.
Gluteus minimus
O: ilium between anterior and inferior gluteal lines
I: anterior surface greater trochanter of femur
A: ABD and MR of thigh; keep pelvis level when ipsilateral limb is weight-bearing and advance opposite (unsupported) side during its swing phase N: Superior gluteal n. (L5, S1)
B: Superior gluteal a.
Tesnor Fascia Lata
O: ASIS; anterior part of iliac crest I: IT band A: flexion of thigh, ABD, MR; helps keep knee extended (tenses IT band) N: superior gluteal n. (L5, S1) B: Superior gluteal a.
Piriformis m.
O: anterior surface of sacrum; sacrotuberous l.
I: superior border greater trochanter of femur
A: LR of extended thigh; ABD of flexed thigh; steadies femoral head
N: Ventral rami S1, S2
B: superior and inferior gluteal aa.
Superior gemellus
O: ischial spine
I: trochanteric fossa of femur via t. of obturator interns
A: LR of extended thigh: ABD of flexed thigh ; steadies femoral head
N: Nerve to obturator internus (L5, S1)
B: inferior gluteal and medial femoral circumflex aa.
Obturator Internus
O: pelvic surface of obturator membrane and surrounding bones
I: torchanteric fossa of femur
A: LR of extended thigh; ABD of flexed thigh; steadies femoral head
N: n. to obturator internus (L5, S1)
B: pelvic part - obturator a.
extrapelvic part - medial femoral circumflex a.
Inferior Gemellus
O: ischial tuberosity
I: torchanteric fossa via tendon of obturator internus
A: LR of extended thigh; ABD of flexed thigh; steadies femoral head
N: nerve to quadratus femoris (L5, S1)
B: medial femoral circumflex a.
Obturator Externus
O: margins of obturator foramen and obturator membrane
I: trochanteric fossa of femur
A: LR of thigh; steadies femoral head
N: posterior division obturator n. (L3, L4)
Quadratus Femoris
O: lateral border of ischial tuberosity
I: Quadrate tubercle of femur and area inferior to it
A: LR of thigh; steadies femoral head
N: N. to quadratus femoris (L5, S1)
B: medial femoral circumflex and 1st perforating aa.
VPR of superior gluteal n. and what does it supply?
L4-S1, supplies gluteus medius, minims and tensor fascia lata mm.
VPR of Inferior gluteal n. and what does it supply?
L5-S2, supplies gluteus maximus m.
VPR of Sciatic n. and what does it supply?
L4-S3, doesn’t supply anything in the gluteal region
VPR of n. to quadrates femurs and what does it supply?
L4-S1, supplies quadratus femurs and inferior gemellus mm.
VPR of n. to obturator interns and what does it supply?
L5-S2, supplies obturator interns and superior gemellus mm.
VPR of pudendal n. and what does it supply?
S2-4, doesn’t supply anything in the gluteal region
VPR of clunial nn. and what does it supply?
Superior: DPR of L1-3, supplies skin of superior buttock
Middle: DPR of S1-3, supplies skin over sacrum and adjacent buttock
Inferior from posterior cutaneous n. of thigh, supplies skin over inferior half of buttock
