The acetabular notch is a deep notch in the inferior portion of the rim of the acetabulum. It is bridged by the transverse acetabular ligament, converting it into a foramen (through which nerves and vessels (including the acetabular notch of obturator artery) pass into the hip joint cavity).
The acetabular notch is a deep groove in the lower part of the rim of the acetabulum. It is connected by the transverse acetabular ligament, creating an opening through which nerves and vessels (including the acetabular notch of obturator artery) pass into the hip joint cavity.