Posterior and Gluteal Region Flashcards
High yield information about greater sciatic foramen
A portal into the gluteal region and posterior thigh. The sciatic nerve goes through here and is huge!
What innervates the gluteus medius, minimus and tensor fascia lata?
Superior gluteal nerve (L4-S1)
Injury to superior gluteal nerve results in…
Trendelenburg sign
What innervates the gluteus maximus?
Inferior gluteal nerve (L5-S2)
If injury occurs to inferior gluteal nerve, what happens?
Weakness rising from sitting position, going up stairs
The thigh has 3 muscle compartments, which ones?
Anterior, medial, and posterior
What innervates the anterior compartment of posterior thigh?
Femoral nerve (L2-4) + anterior rami from lumbar plexus (L1-4)
What innervates the posterior thigh compartment?
Sciatic nerve (L5-S2)
What innervates the medial compartment of posterior thigh?
Obturator nerve (L2-4)
What is the primary hip extensor?
Gluteus maximus
What is the primary knee flexor?
Hamstrings
What is the best bony sites to find the femoral nerve?
PSIS, greater sciatic foramen, greater trochanter, and ischial tuberosity
What innervates the gluteus maximus? What is its primary functions?
Innervation: inferior gluteal nerve
Function: Hip extension, lateral rotator
Attachment, insertion, innervation, and function of gluteus medius
Attachment: ala of ilium
Insertion: greater trochanter
Innervation: superior gluteal nerve
Function: abduction, medial rotation
Attachment, insertion, innervation, and function of gluteus minimus
Attachment: ala of ilium
Insertion: ~
Innervation: superior gluteal nerve
Function: medial rotators, abductors
Attachment, insertion, innervation, and function of tensor fascia lata
Attachment: ASIS
Insertion: IT Band
Innervation: superior gluteal nerve
Function: abductor, lateral rotator of tibia, locks knee
What are the lateral rotators of the leg?
Obturator internus, gemelli brothers, quadratus femoris, piriformis, obturator externus