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Intracellular features predicted by extracellular recordings in the hippocampus in vivo.
TLDR
A large percentage of hippocampal CA1 pyramidal cells are silent in any given behavioral condition, and it is determined that a tetrode in hippocampal area CA1 theoretically should be able to record electrical signals from approximately 1, 000 neurons. Expand
Postsynaptic targets of GABAergic hippocampal neurons in the medial septum-diagonal band of broca complex
TLDR
The GABAergic hippocamposeptal feedback controls the activity of septal (mostly GABAergic) projection neurons as a function of hippocampal synchrony and a novel circuit diagram, based on recent morphological-immunocytochemical findings, is shown. Expand
GABAergic Neurons of the Medial Septum Lead the Hippocampal Network during Theta Activity
TLDR
Whether the sequence of events during theta formation supports the classic view of septal drive or the challenging theory of hippocampal pacing of theta is uncovered by analyzing the temporal relationship of activity between the PV/HCN-containing medial sePTal neurons and hippocampal local field potential. Expand
Phase Segregation of Medial Septal GABAergic Neurons during Hippocampal Theta Activity
Septo-hippocampal GABAergic neurons immunoreactive for parvalbumin are thought to play a crucial role in the generation of hippocampal theta oscillations associated with a specific stage of memoryExpand
Fast Synaptic Subcortical Control of Hippocampal Circuits
TLDR
A form of subcortical control of cortical information processing whereby strong, spatiotemporally precise excitatory input from midbrain serotonergic neurons produces a robust activation of hippocampal interneurons is described. Expand
Behavior-dependent specialization of identified hippocampal interneurons
TLDR
Basket, but not ivy, cells changed their firing rates during movement, sleep and quiet wakefulness, suggesting that basket cells coordinate cell assemblies in a behavioral state–contingent manner, whereas persistently firing ivy cells might control network excitability and homeostasis. Expand
Temporal Dynamics of Parvalbumin-Expressing Axo-axonic and Basket Cells in the Rat Medial Prefrontal Cortex In Vivo
TLDR
The spike-timing of identified neurons in the prelimbic cortex of anesthetized rats is recorded, and it is shown that axo-axonic cells increase their firing during tail pinch-induced brain state-activation and in their coupling to gamma and spindle oscillations. Expand
Sleep and Movement Differentiates Actions of Two Types of Somatostatin-Expressing GABAergic Interneuron in Rat Hippocampus
TLDR
It is shown that behavioral and network states differentiate the activities of bistratified and O-LM cells in freely moving rats, and peptide/GABA-releasing interneurons' firing patterns during behavior are unknown. Expand
The presence of pacemaker HCN channels identifies theta rhythmic GABAergic neurons in the medial septum
TLDR
The data imply that HCN‐expressing GABAergic neurons provide rhythmic drive in all phases of the hippocampal theta activity, which is apparently determined by interactions at the level of the network rather than by the pacemaking property of HCN channels alone. Expand
Sleep and Movement Differentiates Actions of Two Types of Somatostatin-Expressing GABAergic Interneuron in Rat Hippocampus
TLDR
There was an error in the two-sample Kolmogorov-Smirnov statistical testing of firing rate changes that changed the evaluation of individual cells under certain behavioral and network states but do not change the conclusions of the paper for the overall population of a given cell type. Expand
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