Medial Aspect of Ischiopubic ramus
Description: The male expression is described as ‘‘a broad surface which is found on the ischio-pubic ramus immediately below the symphyseal surface,’’ while the female condition consists of a sharp ‘‘ridge which is found here... in contrast to the broad surface in the male’’ (Phenice, 1969: 300). In addition to the ridge, the female form is narrower than the male form. Consider the thickness of the ramus relative to the surrounding structures and overall innominate size. The presence of a ridge or plateau should be given more weight than the overall relative width of the ramus.
Scoring: The symphyseal face should be held perpendicular to the viewer and the scorer should palpate the area below the symphyseal face to approximately 1/3rd of the way down the ischio-pubic ramus. If a ridge or plateau is present on superior 1/3rd of ramus (not just below symphysis), see scores 1-2. If no ridge is present, see scores 3-5 and evaluate based on width.