# Waking up

Consider what might happen when we wake up. Does this present a difficult problem for neuroscience or not? If how we think, the kind of person we are, is some complicated function of cortical firing rates, $\vec{r}$ then generating this pattern of firing rates from scratch (i.e. a sleeping state) is a daunting prospect. The opposite perspective, which is the topic of these pages, is that the complexities of how we think, the kind of person we are, is encoded in stored synaptic weights, $\mathbf{W}$, which remains fixed during the night (at least to a first approximation). Moving $\vec{r}$ along a path from some sleeping state back to familiar routes through sensory+motivational space is not such a computational nightmare.