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Vicq-d’Azyr was a comparative anatomist of note, who rose to eminence in Paris, only to disappear during the Terror. His portrait is lurking in the illustration of the brain, derived from his Treatise on Anatomy of the Brain which was published in 1786. He examined the brain by preparing it with alcohol and taking coronal sections. By these means he was able to study the convolutions of the brain more systematically and to name the gyri.