The Hip Bone ( श्रोणिफलकास्थि ) ilium & its attachments
Hip Bone Anterior View Anatomical Position Hip Bone
Intro : Also called as innominate bone Articulation : Head of Femur Pubis of the another hip bone Sacrum Side Determination : Acetabulum directed laterally Ilum , fan like expanded part superiorly Obturator foramen lies below below acetabulum
Ossification Primary(3) Ilium : above greater sciatic notch in 8 th week Ischium : below acetabulum in 4 th month Pubis : in the superior ramus in 4 th or 5 th month Secondary (5) Appear at puberty and fuse with rest of the bones
Pubis The Hip Bone is a composite of 3 bones Pubis
Pubis Ischium The Hip Bone is a composite of 3 bones Pubis Ischium
Pubis Ischium Ilium The Hip Bone is a composite of 3 bones Pubis Ischium Ilium
These three bones meet within the Acetabulum Acetabulum (Latin for Vinegar Cup) Pubis Ischium Ilium
During development they are separated from each other by the Triradiate Cartilage
During development they are separated from each other by the Triradiate Cartilage
Posterolateral view of the right Hip Bone Anterior Border Extends from ant.sup.iliac spine to acetabulum
Posterolateral view of the right Hip Bone Posterior Border Extends form posterior superior iliac spine to to upper end of posterior border of ischium Shows the presence of greater sciatic notch & post.inf.iliac spine
Extends form iliac crest to iliopubic eminence Medial Border
1) Sacro Pelvic Surface Surfaces of ilium
It is divided into 3 parts : Iliac Tuberosity Auricular Surface Pelvic Surface A rough groove called periauricular sulcus is usually fund in this area it is more deeper in females
The Auricular Facet Articulates with the Sacrum at the Sacroiliac Joint
2) Iliac Fossa
The Iliac Fossa provides attachment for Iliacus which inserts onto the Lesser Trochanter of the Femur *Iliacus flexes the Hip Joint
Posterolateral view of the Hip Bone Gluteal or Posterolateral surface Outer surface of ilium constitutes the gluteal surface Marked by 3 ridges or lines
Posterior Gluteal Line Anterior Gluteal Line Inferior Gluteal Line
Posterolateral view of the Hip Bone Landmarks on Posterolateral Surface
Ilium Body of the Ilium
Ala of Ilium
Iliac Crest
Iliac Crest Runs from Anterior Superior Iliac Spine
Iliac Crest Runs from Anterior Superior Iliac Spine to the Posterior Superior Iliac Spine
Iliac Crest Below the Posterior Superior Iliac Spine is the Posterior Inferior Iliac Spine
Iliac Crest The Anterior Inferior Iliac Spine is below the Anterior Superior Iliac Spine
Muscle Attachments
Postero-lateral View Tensor Fasciae Latae Originates from anterior superior iliac spine outer lip of anterior 1/4 th of iliac crest fascia lata
Postero-lateral View Tensor Fasciae Latae Inserts via the Iliotibial Tract (band) onto Gerdy’s Tubercle on anterior aspect of Lateral Tibial Condyle Originates from anterior superior iliac spine outer lip of anterior 1/4 th of iliac crest fascia lata
Postero-lateral View Sartorius Originates from the Anterior Superior Iliac Spine
Postero-lateral View Sartorius Originates from the Anterior Superior Iliac Spine Inserts onto the medial aspect of upper Tibia
Postero-lateral View Sartorius Originates from the Anterior Superior Iliac Spine Inserts onto the medial aspect of upper Tibia Flexes, adducts and laterally rotates the hip Flexes the knee
Postero-lateral View Gluteus Medius Originates from outer surface of Ilium between Posterior and Anterior (middle) Gluteal Lines
Postero-lateral View Gluteus Medius Inserts onto lateral surface of Greater Trochanter of Femur Originates from outer surface of Ilium between Posterior and Anterior (middle) Gluteal Lines
Postero-lateral View Gluteus Medius Originates from outer surface of Ilium between Posterior and Anterior (middle) Gluteal Lines Inserts onto lateral surface of Greater Trochanter of Femur Abducts thigh Medially rotates hip
Postero-lateral View Gluteus Minimus Originates from outer surface of Ilium between Inferior and Anterior (middle) Gluteal lines
Postero-lateral View Gluteus Minimus Inserts onto anterior surface of Greater Trochanter of Femur Originates from outer surface of Ilium between Inferior and Anterior (middle) Gluteal lines
Postero-lateral View Gluteus Minimus Inserts onto anterior surface of Greater Trochanter of Femur Abducts and medially rotates the hip joint Originates from outer surface of Ilium between Inferior and Anterior (middle) Gluteal lines
Postero-lateral View Gluteus Maximus Originates from Posterior aspect of dorsal ilium posterior to posterior gluteal line posterior superior iliac crest posterior surface of sacrum and coccyx sacrotuberous ligament
Postero-lateral View Gluteus Maximus Inserts onto Iliotibial band Gluteal Tuberosity posterior Femur
Postero-lateral View Gluteus Maximus Inserts onto Iliotibial band Gluteal Tuberosity posterior Femur Extends and laterally rotates hip
Postero-lateral View Piriformis Originates from anterior surface of Sacrum gluteal surface of Ilium at the margin of the greater sciatic notch
Postero-lateral View Piriformis Originates from anterior surface of Sacrum gluteal surface of Ilium at the margin of the greater sciatic notch Inserts onto superior aspect Greater Trochanter of Femur
Postero-lateral View Piriformis Originates from anterior surface of Sacrum gluteal surface of Ilium at the margin of the greater sciatic notch Inserts onto superior aspect Greater Trochanter of Femur Laterally rotates Hip Joint
Muscle Summaries
Tensor Fasciae Latae Origin Anterior superior iliac spine, outer lip of anterior iliac crest and fascia lata Insertion Via the Iliotibial band onto Gerdy’s tubercle on lateral tibial condyle Action Assists gluteus maximus in maintaining extended knee, abducts hip Nerve Supply Superior gluteal nerve (L4, L5, S1) Blood Supply Superior gluteal and lateral circumflex femoral artery Anterior Thigh
Sartorius Origin Anterior superior iliac spine Insertion Superior aspect medial surface of tibial shaft Action Flexes, adducts and laterally rotates the hip joint and flexes the knee Nerve Supply Anterior division of femoral nerve (L3, L4) Blood Supply Femoral artery Anterior Thigh
Gluteus Medius Origin Outer surface of ilium between posterior and anterior gluteal lines Insertion Lateral and superior surfaces of greater trochanter of femur Action Abducts thigh; medially rotates hip Nerve Supply Superior gluteal nerve (L4, L5, S1) Blood Supply Superior gluteal artery Gluteal Region
Gluteus Minimus Origin Outer surface of ilium between inferior and anterior gluteal lines Insertion Anterior surface of greater trochanter of femur Action Abducts and medially rotates the hip joint Nerve Supply Superior gluteal nerve (L4, L5, S1) Blood Supply Superior gluteal artery Gluteal Region
Gluteus Maximus Origin Posterior aspect of dorsal ilium posterior to posterior gluteal line, posterior superior iliac crest, lateral sacrum and coccyx, and sacrotuberous ligament Insertion Iliotibial band; gluteal tuberosity posterior femur Action Extends and laterally rotates hip Nerve Supply Inferior gluteal nerve (L5, S1, S2) Blood Supply Inferior and superior gluteal arteries Gluteal Region
Piriformis Origin Anterior surface of lateral process of sacrum and gluteal surface of ilium at the margin of the greater sciatic notch Insertion Superior aspect greater trochanter of femur Action Lateral rotator of the hip joint Nerve Supply Anterior primary rami S1, S2 Blood Supply Superior and inferior gluteal and internal pudendal arteries Gluteal Region
Anterior Thigh Rectus Femoris Origin Straight head: anterior inferior iliac spine Reflected head: ilium just above acetabulum Insertion Base of patella to form the more central portion of the quadriceps femoris tendon Action Extends the knee Nerve Supply Posterior division of femoral nerve (L2, L3, L4) Blood Supply Lateral circumflex femoral artery
Hip Flexors Iliacus Origin Upper 2/3 of iliac fossa of ilium, lateral aspect of sacrum Insertion Lesser trochanter of femur Action Flexes and medially rotates hip Nerve Supply Muscular branch of femoral nerve (L2, L3) Blood Supply Lumbar branch of iliolumbar branch of internal iliac artery