This app for Microneurosurgery contains the "Helsinki Microneurosurgery Basics and Tricks" which is a unique book about the "Hernesniemi school of neurosurgery" written by Martin Lehecka, Aki Laakso and Juha Hernesniemi. It is introduced by a foreword of Dr. Robert Spetzler.
Additionally this app provides many operative videos and pictures which the book directly refers to and an interesting link to the Hernesniemi-Aescuap Fellowship.
