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Prominent Burst Firing of Dopaminergic Neurons in the Ventral Tegmental Area during Paradoxical Sleep
TLDR
Challenging the traditional view that dopamine is the only aminergic group not involved in sleep physiology, this study provides an alternative perspective that may be crucial for understanding the physiological function of PS and dream mentation.
Interdependence of Multiple Theta Generators in the Hippocampus: a Partial Coherence Analysis
TLDR
It is suggested that timing of the action potentials of pyramidal cells during the theta cycle is determined by the cooperation between the active CA3 neurons and the entorhinal input.
Cortically projecting basal forebrain parvalbumin neurons regulate cortical gamma band oscillations
TLDR
This report identifies a particular subcortical cell type which has increased activity during waking and is involved in activating the cerebral cortex and generating gamma oscillations, enabling active cortical processing, and indicates that this presumptively inhibitory BF PV input controls cortical GBO, likely by synchronizing the activity of cortical PV interneurons.
Serotonergic neuron diversity: identification of raphe neurons with discharges time-locked to the hippocampal theta rhythm.
TLDR
The results indicate that the ascending serotonergic system comprises cells involved in complex information processing beyond the regulation of state transitions, and the heterogeneity ofserotonergic neuron behavior can also help to explain the complexity of symptoms associated with Serotonergic dysfunction.
Elicited hippocampal theta rhythm: a screen for anxiolytic and procognitive drugs through changes in hippocampal function?
TLDR
Reductions in the frequency of reticular-elicited theta provide what is currently the best in-vivo means of detecting antianxiety drugs and it is suggested that increases in the power of reticulated theta could detect drugs useful in the treatment of disorders, such as dementia, that involve memory loss.
Sleep-Dependent θ Oscillations in the Human Hippocampus and Neocortex
TLDR
The findings suggest that the generation mechanisms of θ oscillations in humans might have evolved from tonic to phasic in hippocampus during REM sleep and extended from hippocampus to cortex, where they appear in certain wakefulness-related states.
Sleep-dependent theta oscillations in the human hippocampus and neocortex.
TLDR
The findings suggest that the generation mechanisms of theta oscillations in humans might have evolved from tonic to phasic in hippocampus during REM sleep and extended from hippocampus to cortex, where they appear in certain wakefulness-related states.
Theta synchronization in the limbic system: the role of Gudden's tegmental nuclei
TLDR
It is demonstrated in the rat that neuronal activity exhibiting strong state‐dependent synchrony with rhythmic hippocampal electroencephalogram is present also at the brainstem level, specifically in the relatively small tegmental nuclei of Gudden intimately connected with the limbic forebrain.
Characterization of neurons of the supramammillary nucleus and mammillary body that discharge rhythmically with the hippocampal theta rhythm in the rat
TLDR
The foregoing suggests that the theta-related cells of MB are driven by descending projections from the hippocampal formation (CA1), whereas those of the SUM are not, and may be directly involved in the generation of theta and/or the transfer of theTA rhythmicity to various parts of the limbic system and forebrain.
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