Ligaments of the Lower Limb

Question 1

Anterior View

Answer 1

The Iliolumbar Ligament

extends from the iliac crest to the transverse processes of the fifth lumbar vertebra and the first sacral vertebra.

It helps to support and limit excessive movement in the lumbar region of the spine, contributing to the overall stability of the lower back and pelvis.

Question 2

Anterior View

Answer 2

The Anterior Sacroiliac Ligament

connects the anterior (front) surface of the sacrum to the adjacent portion of the ilium, contributing to the stability of the sacroiliac joint, which is the articulation between these two bones.

Question 3

Anterior View

Answer 3

Inguinal Ligament

It runs diagonally from the anterior superior iliac spine (ASIS) of the pelvic bone to the pubic tubercle

The inguinal ligament plays a key role in forming the floor of the inguinal canal, a passageway in the abdominal wall.

Question 4

Anterior View

Answer 4

Sacrospinous Ligament

runs from the sacrum to the ischial spine

The primary function of the sacrospinous ligament is to provide support to the pelvic organs, such as the uterus and vagina, helping to maintain their position within the pelvis. Additionally, it helps maintain stability in the pelvic region.

Question 5

Posterior View

Answer 5

Sacrotuberous Ligament
(seen on each side of the sacrospinous Ligament)

Runs from the sacrum to the ischial tuberosity

Supports sacroiliac joint: stabilizes the joint that connects the sacrum to the ilium (

Reinforcing the posterior part of the pelvis contributes to the overall strength and stability of the pelvic region.

Question 6

Anterior View (orange)
Membrane not Ligament*

Answer 6

Obturator Membrane

Runs across the obturator foramen, a large opening in the hip bone formed by the ischium and pubis bones

Question 7

Posterior View

Answer 7

Posterior Sacro-Iliac Ligament

The posterior sacroiliac ligament is situated on the back side of the sacroiliac joint, connecting the sacrum to the posterior (back) part of the ilium.

Question 8

Zoomed in Anterior View

Answer 8

Interosseous Sacro-Iliac Ligament

This ligament is situated between the sacrum and the ilium and extends from the sacral tuberosity to the iliac tuberosity.

It serves to reinforce and maintain the integrity of the sacroiliac joint, which is crucial for bearing the weight of the upper body and transferring it to the pelvis and lower limbs during activities such as walking and standing.

Question 9

Name these 2 ligaments

Answer 9

Superior Pubic Ligament

Inferior Pubic Ligament

Question 10

What are the Ligaments of the HIP JOINT (5)

Answer 10

1. Ligament of Head of Femur:
   attaches from the acetabular notch to the fovea of the femoral head
2. Transverse Acetabular Ligament:
   bridges the acetabular notch and covers the ligament of the head of the femur
3. Iliofemoral Ligament (Anterior)
   runs from the anterior inferior iliac spine of the pelvis to the intertrochanteric line on the femur. helps prevent hyperextension.
4. Pubofemoral Ligament (Anterior)
   It extends from the superior pubic ramus to the femur. helps to reinforce the joint’s anterior capsule.
5. Ischiofemoral Ligamnet (Inferior)
   runs from the ischium to the femur.
   helps prevent excessive extension of the hip