Determinants of different deep and superficial CA1 pyramidal cell dynamics during sharp-wave ripples

Using a combination of electrophysiological and neurochemical techniques the authors report that deep and superficial CA1 pyramidal neurons behave differently during hippocampal sharp-wave ripples, with deep cells becoming hyperpolarized and superficial cells undergoing depolarization. The study also reveals some of the microcircuit mechanisms that underlie this spatiotemporal specialization, including the involvement of CA2 pyramidal cells and the role of perisomatic inhibition.