<a href="https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;Diane_Van_Deren" rel="nofollow">https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;Diane_Van_Deren</a>, an ultramarathoner, had part of her right hippocampus removed to stop her seizures, which affected her ability to keep track of time and to read maps. Radiolab did a story on her a few years ago:<p><a href="http:&#x2F;&#x2F;www.radiolab.org&#x2F;story&#x2F;122291-in-running&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.radiolab.org&#x2F;story&#x2F;122291-in-running&#x2F;</a>