Simple and powerful visual stimulus generator

We describe a cheap, simple, portable and efficient approach to visual stim ulation for neurophysiology which does not need any special hardware equipm ent. The method based on an animation technique uses the FLI autodesk anima tor format. This form of the animation is replayed by a special program ('p layer') providing synchronisation pulses toward recording system via parall el port. The 'player' is running on an IBM compatible personal computer und er MS-DOS operation system and stimulus is displayed on a VGA computer moni tor. Various stimuli created with this technique for visual evoked potentia ls (VEPs) are presented. (C) 1999 Elsevier Science Ireland Ltd. All rights reserved.