Os Coxae Anatomy and Osteology

Mansoor Ahmed

Lower Extremity Anatomy Course Director - Dr. Bareither, PhD
Clinical Anatomy Course Director - Dr. Manion, PhD
Anatomy Lab Diener - Adam Jansen

This video explains the anatomy and osteology of the Os Coxae, a left bone is used.

Acetabulum-------------------------------------------------------------------------------------

Acetabular margin – acetabular labrum attaches here
Acetabular notch – gap in the acetabular margin, bridged by the transverse acetabular ligament thereby forming the acetabular foramen
Lunate Surface – articulates with head of femur, crescent shaped, wider superiorly, upper portion is the weight bearing surface
Acetabular fossa – ligament teres

Ilium--------------------------------------------------------------------------------------------------

Body – upper 2/5 of acetabulum

Ala

a. External Surface – posterior, anterior, and inferior gluteal lines, and supra acetabular groove (acetabular brim)

b. Internal Surface – iliac fossa, auricular surface, iliac tuberosity, pre auricular sulcus

c. Iliac Crest – ventral (anterior 2/3) and dorsal (posterior 1/3) segment. Ventral portion divided into inner, intermediate, and outer lip. Dorsal segment divided into an inner and outer sloping surface.

Ischium---------------------------------------------------------------------------------------------

Body – ischial tuberosity, ischial spine

Ramus – joins inferior ramus of pubis to form the ischiopubic ramus, and this encloses the obturator foramen

Pubis-------------------------------------------------------------------------------------------------

Superior ramus – pectineal line, obturator crest, obturator groove, iliopubic eminence

Body – pubic tubercle, pubic crest, symphyseal surface

Inferior ramus – joint ramus of ischium to form the ischiopubic ramus