The presidential debates set a new Twitter record for the most-tweeted-about US political event in history with over 10 million tweets sent during the hour and a half event. And this infographic explores what topics got the Twitterverse really fired up.

As you might have heard, one of the most tweeted moments of the debate was the Big Bird snafu – Romney’s assertion that he’d cut PBS funding. But this infographic from SnappyTV shows that people were also interested in tweeting about the actual core issues of the debate: taxes, the economy and healthcare.

SnappyTV took a look at the social volume signatures – the different patterns of tweet volume – for both “#taxes” and “#healthcare” during the debate. As the infographic shows, Twitter users began talking about taxes early in the night and continued to do so after the initial spike, while healthcare saw a big burst of tweets around the middle of the debate and slowed down shortly after.

Take a look at more Twitter stats and social volume signatures related to the hottest debate issues in the infographic below:

(infographic courtesy of SnappyTV.com; Debate image via Shutterstock)