Longden et al. demonstrate that brain capillaries function as a vast sensory web, monitoring neuronal activity by sensing K+ and translating this into a KIR-channel-mediated regenerative retrograde hyperpolarizing signal that propagates to upstream arterioles to drive vasodilation and an increase in blood flow into the capillary bed.
- Thomas A Longden
- Fabrice Dabertrand
- Mark T Nelson
