Sharp wave ripples (SPW‐Rs) represent the most synchronous population pattern in the
mammalian brain. Their excitatory output affects a wide area of the cortex and several …

In the hippocampus GABAergic local circuit inhibitory interneurons represent only~ 10–15%
of the total neuronal population; however, their remarkable anatomical and physiological …

Gamma rhythms are commonly observed in many brain regions during both waking and
sleep states, yet their functions and mechanisms remain a matter of debate. Here we review …

A widely discussed hypothesis in neuroscience is that transiently active ensembles of
neurons, known as" cell assemblies," underlie numerous operations of the brain, from …

The hippocampal CA3 region plays a key role in learning and memory. Recurrent CA3–CA3
synapses are thought to be the subcellular substrate of pattern completion. However, the …

Excitatory control of inhibitory neurons is poorly understood due to the difficulty of studying
synaptic connectivity in vivo. We inferred such connectivity through analysis of spike timing …

Gamma frequency oscillations are thought to provide a temporal structure for information
processing in the brain. They contribute to cognitive functions, such as memory formation …

The hippocampus is one of a group of remarkable structures embedded within the brain's
medial temporal lobe. Long known to be important for memory, it has been a prime focus of …

SYNCHRONIZATION of neuronal activity is fundamental in the operation of cortical
networks1. With respect to an ongoing synchronized oscillation, the precise timing of action …

Several lines of evidence indicate that brief (< 25 ms) bursts of high-frequency firing have
special importance in brain function. Recent work shows that many central synapses are …