i went with thalamus, after the part of your brain that relays motor signals due to the "instinctual" function and response of his body/powers. as updates have come out i've become even happier with the choice. amygdala and hippocampus would also fit well to him, but hippocampus sounds silly as a name and amygdala sounded too beautiful for the almost grotesque armor and powers for my liking.