Nerve innervation inconsistencies why are there so many inconsistencies on the innervation of nerves between anatomy books?

People : People who look at several different anatomy books often notice subtle, and sometimes not so subtle, differences between descriptions and depictions of nerves and other anatomical structures. There are many reasons for the discrepancies, but one of the most practical reasons is that human anatomy is actually different from person to person. Another important reason is that most anatomy books are based, at least in part on doctrine rooted in the different schools of thought that grew up over the hundreds of years that anatomy has been studied and taught. Early modern anatomy (which was itself greatly influenced by classical texts passed on via the arabic schools) began in the 15th century. Great schools of anatomy included those at bologna, padua, heidelberg, and oxford. The modern "classic" anatomy texts are authored or edited by scholars who can probably trace their scholarly ancestry back to those schools. Another important concept is that advanced students of anatomy recognize that the primary function of an anatomy text is to demonstrate an organizational framework by which to logically arrange our understanding of a complex, observational science, rather than to indicate hard and fast "laws" of human anatomy. The most modern anatomy texts usually incorporate a more scientific approach. They attempt to describe the general themes of anatomy, and provide some commentary on the normal and abnormal variants encountered during dissection of a (relatively small) group of cadavers.