Ancient Roman/Greek guy who thought the heart controlled emotions?

Factual Questions
1

I remember reading once that some ancient Greek, or possibly Roman guy thought that the heart controlled emotions because it would change rhythm when the person was experiencing different emotions.

Does anyone know who this was?

2

Fellow named Cecil Adams - you may have heard of him - wrote something about this:

http://www.straightdope.com/classics/a5_271.html

Seems like it goes a lot further back than the Gs and Rs.