The United States Air Force Academy is both a military organization and an accredited college for the undergraduate education of commissioned officers for the United States Air Force. Its campus is located immediately north of Colorado Springs in El Paso County, Colorado.
Position of Ischial tuberosity. Ischial tuberosity is present at the subsequent part of the ramus of Ischium which is one of the major bones of pelvic girdle. Anatomically ischial tuberosity is the puffy bony formation divided into two parts â upper and lower region.
Then, the position of the presenting part, i.e., that part of the baby (hopefully, the top of the head) that will be the first to deliver, is felt as compared to the ischial spines. If the very top of the head is at the ischial spines, it's called a zero station.And for every centimeter distance from the spines, either above or below, the presenting part can be said to be anywhere between -3 and +3. -3 is 3 cm. above the ischial spines.hen, the position of the presenting part, i.e., that part of the baby (hopefully, the top of the head) that will be the first to deliver, is felt as compared to the ischial spines. If the very top of the head is at the ischial spines, it's called a zero station.