Lecture 6 - Gluteal Region and Hip Joint

Question 1

What is the cutaneous innervation of the buttock?

L6 S4-5 LO1

Answer 1

Upper medial:
-posterior rami L1-3 and S1-3

Upper lateral:

• iliohypogastic (L1)
• anterior rami T12

Lower medial:
-posterior femoral nerves (anterior rami S1-3)

Lower lateral:
-lateral cutaneous nerve (anterior rami L2-3)

Question 2

What muscles are in the posterior and lateral compartments of the gluteal region?
What is the collective function of these muscles?

L6 S11 LO3

Answer 2

Posterior compartment:
-gluteus maximus

Lateral compartment

• gluteus medius
• gluteus minimus
• tensor fascia latae

They are collectively abductors preventing us from falling toward the unsupported side while walking