Up & Down: The Dopaminergic Organisation & What’s Love Got To Do With It Posted 4 years ago Tagged Daniel Z Lieberman extra-personal space Innovation Exploit Explore Look Up Innovation Neuroscience The Molecule of More The peripersonal space (PPS) The brain divides the world into 2 spaces, up and down. Up encourages us to seek out more, down encourages us to protect what we already have.