The ischiopubic ramus is a compound structure consisting of the following two structures:
from the pubis, the inferior pubic ramus
from the ischium, the inferior ramus of the ischium
It serves as part of the origin for the Obturator internus muscle.
This definition incorporates text from the wikipedia website - Wikipedia: The free encyclopedia. (2004, July 22). FL: Wikimedia Foundation, Inc. Retrieved August 10, 2004, from http://www.wikipedia.org