CLPEX Chat Board

The latest IAI journal has published an article about the ontogeny (path of development) of the friction ridge by discussing the similarities and differences between work by Cummins with that by Hale. While not incorrect in the interpretation of the two theories it does claim that it represents a comprehensive but concise explanation of suggested morphogenetic pathways. I have trouble with this claim since there is more than one cap in the ring about how the friction ridges form. This thread is not meant as a criticism of the author or the IAI, I am highly supportive of articles that research and present information about how friction skin forms. In balance though I would submit that the skin is an organ that has interdependence with the nervous system and both combine to provide an effective barrier and the special sense capability of discriminating touch. There is a volume of modern research available that explains the ontogeny of friction ridges as a combination of nervous tissues and skin tissues acting in concert, developing together during the second trimester and resulting in special sense skin. If anyone wishes to engage in studying this theory please begin with any work by Bryce Munger on the subject as well as work he has co-authored. Regards from oz. Les