Brain anatomy quiz mode
I suggest adding a flash-card style neuroanatomy quiz feature, in which the viewer would launch showing one of the standard templates (probably MNI152_T1_1mm) and the user would select one of the reasonable atlases (i.e. anything but Talairach). Then the user would select either of the following modes:
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Identify location -- Crosshair jumps to centre of random region (from selected atlas), presents multiple choice question with correct region name among five randomly ordered region names (either completely randomly chosen, or perhaps choose closest regions, if not too slow to identify these). Move to new region once correct answer is clicked.
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Find region -- Random region is named, user must try to locate crosshair inside region, click "submit" when done. If correct, show region in overlay, allow user to click "next"; if incorrect, indicate distance from region centre, allow user to try again or to choose "show me" (then to click "next" once happily educated).
Optional feature to keep track of success rate, e.g. showing percent correct-first-time, over all "games" and just over last 5 games. Percentage too low results in automatic disciplinary action.