To my knowledge, I would have to agree with LDGuy, but I'm going to do some more research. Here's a bit of information on the frontal lobe:

Frontal lobe (3)
Prefrontal cortex (frontal cortex): Dorsolateral prefrontal cortex for motivation and foresight to initiate and plan movements, working memory, socialisation and complex problem solving. Broca's area (5) in inferior portion for motor speech. Areas for voluntary motor function, aggression, smell and mood. Motor cortex (4): posterior part of the lobe[/b]