bilateral symmetry and evolution of our brains

[NewtoBiology]

Hello everyone,

I have just finished studying invertebrates, and have learnt the importance of bilateral symmetry and the affect on aggregation of neurons at the head end of organisms.

SO I've been thinking (yikes my biology wheels are turning!) obviously this change from asymetrical to bilateral symmetry affected and was an important step in the evolution of human brains. AM I RIGHT or totally off??? Can anyone add to my theory, someone must have written on this or agrees with this.... or have I lost hope of becoming a biologist???

[Darby]

It's such a basic step that I'm not sure how it's relevant - you kind of need bilateral symmetry to get centralized anterior brains in the first place, but that's many many many steps backward on our family tree. It's the evolution of brains, period, which I guess you need to eventually get human brains.