Lecture 6.5 - Ligaments of the Hip

Question 1

What ligaments form the greater and lesser sciatic foramina?

L6.5 S3

Answer 1

Greater sciatic foramen:
-sacrospinous ligament (from lateral margin of sacrum/coccyx to ischial spine)

Lesser sciatic foramen:
-sacrotuberous ligament (from lateral margin of sacrum/coccyx to ischial tuberosity

Question 2

What are the innervation and blood supply of the hip?

L6.5 S5

Answer 2

Innervation:

• femoral nerve
• obturator nerve

Blood supply:

• superior/inferior gluteal arteries
• medial/lateral circumflex femoral arteries

Question 3

What are the extra capsular ligaments of the hip?

L6.5 S6-7

Answer 3

Iliofemoral:

• strongest ligament in body
• AIIS to acetabular rim/inter trochanter is line
• prevents hyperextension

Pubofemoral:

• obturator crest to joint capsule and iliofemoral lig.
• prevents overabduction

Ischiofemoral:

• weakest
• ischial rim of acetabulum to superolateral femoral neck

Question 4

What are the intracapsular ligaments?

L6.5 S8-9

Answer 4

Acetabular labrum:
-extension of acetabular ridge creating deep socket

Transverse acetabular ligament:

• across acetabular notch
• prevents inferior displacement of femur

Zona orbicularis:

• perpendicular to extracapsular ligament
• runs with neck of femur

Ligamentum teres:

• acetabulum to foeva of head of femur
• contains branch of obturator artery