First Among Equals Growing the Mind Episodes 4 and 5 of the amazing series focusing on the human brain. Its from 2000 I believe, but still holds up ok. All 6 episodes can be found on bittorrent.

Horizon takes viewers on an extraordinary journey into the human memory. From the woman who is having her most traumatic memories wiped by a pill, to the man with no memory, this film reveals how these remarkable human stories are transforming our understanding of this unique human ability.