The Gluteal Region

Question 1

What are the 3 major gluteal muscles?

Answer 1

gluteus maximus, medius, minimus

Question 2

what is the innervation, blood supply and action of gluteus maximus?

Answer 2

inferior gluteal nerve, inferior gluteal artery and extensor of the the thigh on the trunk

Question 3

what is the innervation, blood supply and action of gluteus medius?

Answer 3

superior gluteal nerve, superior gluteal artery and abduct thigh from the trunk and stabilize the pelvis

Question 4

what is the innervation, blood supply and action of gluteus minimus?

Answer 4

superior gluteal nerve, superior gluteal artery, and abduct thigh from the trunk and stabilize the pelvis

Question 5

describe the trendelenberg sign.

Answer 5

the necessity to throw your weight over the planted foor during gait

Question 6

what accounts for the appearance of the trendelenburg sign?

Answer 6

the gluteus medius/minimus are not contracting to stabilize the pelvis in a horizontal plan with one foot off the ground

Question 7

list the short lateral rotators of the thigh in order from superior to inferior

Answer 7

piriformis, gemmelus superior, obturator internus (tendon), gemmelus inferior, quadratus femoris

Question 8

what is the nerve supply of the lateral rotators? their blood supply?

Answer 8

All the short rotators of the thigh are innervated by the sacral plexus

Question 9

Which two structures from the pelvis pass medially to the sciatic nerve to supply the perineum?

Answer 9

The internal pudendal artery and pudendal nerve

Question 10

What are the root values (cord levels) that comprise the sciatic nerve?

Answer 10

L4-S3

Question 11

What may cause injury to the sciatic nerve?

Answer 11

Fractured hip or IM injection below the safe area of the gluteal region