Brainstem and SEZ anatomy is a mobile App that enhances studying on the brainstem (the center of the human brain) to the next level. Until this App was born, medical students or residents had to go through tens of 2D sections of the brainstem on the textbooks to learn anatomy of the brainstem, which was quite a work and more than that, boring. Not any more! With this App, you can see inside of the brainstem by simply tapping the brainstem. Learners can easily and intuitively grasp 3D relationships of the complex anatomy. For professional use, information on safe surgical approaches to the brainstem was collected from more than 20 papers published over 40 years. This is also the world's first App that can be used in presurgical simulation.