Maɗaukakin tsaka-tsakin yana nufin zagayowar shahara ko tsinkaya akan ƙashi wanda yake zuwa tsakiyar layin jiki. Musamman, yawanci yana nufin tsinkaya mai zagaye akan ƙananan ƙarshen kashin femur wanda ke bayyana kashin tibia don samar da haɗin gwiwa na gwiwa. Matsakaicin matsakaici na femur yana a gefen ciki na haɗin gwiwa, kuma ya fi girma fiye da na gefe, wanda ke gefen waje na haɗin gwiwa.