Observations on the formation and persistence of radiopaque transverse lines.

The formation and persistence of radiopaque transverse lines have been assessed in the living in clinical studies of growth, nutrition, and disease. Lines have also been used by many researchers in the analysis of patterns of childhood stress in prehistoric skeletal materials, although most of this research has been undertaken on adult bones. However, how reliable and useful are transverse lines for interpretations of stress? The precise etiologies for their appearance are varied and controversial, and lines are also known to resorb during both childhood and the adult years. Sex differences in both their formation and persistence have also been reported. To assess better the viability of lines as indicators of stress, the present research analyzes rates of formation, distribution frequencies, and the persistence of transverse lines in individuals aged birth to 50+ years from a single archaeological population. The results suggest that while transverse lines may be analytically useful as subsidiary criteria for more fully understanding the biological well-being of prehistoric populations, caution should be exercised in the interpretations made concerning childhood stress, particularly when using adult bones.