Just FYI
Here is the link to the article mentioned by Lawyer1732 above...
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3707352/
Ther Adv Neurol Disord. Jul 2013; 6(4): 211–227.
doi: 10.1177/1756285613481257
PMCID: PMC3707352
Topiramate: Effects on cognition in patients with epilepsy, migraine headache and obesity
Barbara R. Sommer,corresponding author Erica L. Mitchell, and Tonita E. Wroolie