Unity3D / Google Cardboard Android app for viewing a model of the human brain
APK available here
More info on the data at thyrd.info/brainvr
Building Brain VR
Brain VR uses the Takohi Games Text to Speech plugin, which is $2 from the Unity store:
Installing that package will create:
Assets/Plugins/Android/ttsunityplugin.jar Assets/Plugins/UnityAndroidTTSPlugin.dll Assets/Takohi/*
which should allow you to build Brain VR.