11-13 Gluteal & POST thigh

Question 1

RANDOM-T0-KNOW
A: Why is it you can see some Obturator internus m. both ABOVE and BELOW the Levator Ani m. ?
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B: What’s an easy way to identify location of the Gemellus muscles? What is their job?
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C: Which Gluteus muscle is on the same plane as the Piriformis, Gemellus muscles and Obturator internus?
*Is this Gluteus muscle a medial or lateral rotator?

Answer 1

B: Gemellus Twins FLANK [Obturator internus m.] with SUP on top and inf. gemellus on bottom. These BOTH are Lateral Rotators of Thigh
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C: GLUTEUS MINIMIS is on SAME PLANE as Piriformis, Gemellus muscles and Obturator internus AND Sits Above all of them
**It is a MEDIAL ROTATOR

Question 2

ILiotibial tract

Answer 2

Important tract attached to [Gluteus Maximus] and [Tensor Fasciae Lata} that extends down & crosses the knee
{helps in some knee flexion}

Question 3

1) The Gluteus Medius stabilizes the ____ _____ . What is a clinical sign for determining pathology to this muscle?
2) What nerve innervates this muscle?

Answer 3

1) Gluteus Medius stabilizes the PELVIC HIP BONE.

Trendelenburg Sign!!
ºIf nerve/muscle damage occurs to R side [Gluteus Medius] —>Pelvic Bone will lean & point to the L when pt goes to take a step & walk.

(This is because when one leg is lifted, the R side [Gluteus Medius] no longer ABducts the hip back down to stabilize —-> so hip leans to L!

2) Gluteus Medius / Gluteus minimus / Tensor Fascia Lata are all innervated by [SUPERIOR Gluteal n.]

Question 4

B: Sciatic Nerve roots are (L4-5 / S1-3) What specifically does the L4-5 represent?
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C: What vessels flank the PIRIFORMIS muscle?

Answer 4

B: Roots [L4-5] = Lumbosacral trunk!
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C: The [SUP Gluteal N/A] flanks Top PIRIFORMIS m. and [inf Gluteal N/A] flanks bottom PIRIFORMIS

Question 5

Although it is a daughter nerve of the [Pudendal n. S2,3,4] this nerve does NOT travel thru [Alcock’s Pudendal Canal] ?

Answer 5

The [inf. rectal n.] does NOT course thru [Alcock Pudendal Canal] even though its a daughter of Pudendal n.

Question 6

A: Why is the [Common Fibular peroneal n.] so vulnerable in Car Bumper Accidents?

B: What happens if it is Damaged?

Answer 6

A: [Common Fibular peroneal n.] travels laterally around to back of knee and then loops around head of fibula.. which makes it vulnerable for CAR BUMPER injuries!

B: If this nerve is damaged—->FOOT DROP!

Question 7

Where does the Semitendonosus sit in relation to its brother Semimembranosus?

Answer 7

the Semitendonosus sits ON TOP of the Semimembranosus and SemiMembranosus is more Medial

Question 8

Explain how the Femoral Artery forms the circumflex around the ____ _______

Answer 8

Femoral a. —-> [DEEP profunda femoral a.] which then forms both [medial femoral circumflex a. ] AND
[Lateral femoral circumflex a.]

These All form around the FEMUR Head

Question 9

A: What is the Cruciate Anastomoses

B: Which 4 arteries make up this Anastomoses structure?

Answer 9

A: Cruciate Anastomoses is a group of Arteries around the HIP which travel to the Knee and enable collateral blood travel

B: “F I L M is all over my Cruciate Anastomoses! ugh “
1. First perforating branch of [DEEP profound femoral a.]

2. [Inferior Gluteal a. ]
3. [Lateral femoral circumflex a.]
4. [medial femoral circumflex a. ]