The technique begins with the placing of light-sensitive proteins from green algae inside specific types of brain cells.

FORBES: Ideas & Opinions

The lights in your brain dim like it's midnight on the Green Mile and wherever you were, you ain't anymore.

WSJ: 2011 Cadillac CTS-V Sport Wagon: Insane, Unnecessary, Awesome | Rumble Seat by Dan Neil

But Dr Robert Green, who led the study, suggested depression could adversely affect the brain or could be a very early symptom of the disease.

BBC: Clue to old age memory loss

He uses an improbable combination of green algae, blue lasers, gene therapy and fiber optics to map neural circuits deep inside the brain with a precision that has never been possible before.

FORBES: Magazine Article