ArticlePflugers Archiv : European journal of physiology2013
Layer- and cell-type-specific tonic GABAergic inhibition of pyramidal neurons in the rat visual cortex.
Article in Pflugers Archiv : European journal of physiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Temporal Association Cortex Gates Sound-Evoked Arousal from NREM Sleep.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
- Region and layer-specific expression of GABAFrontiers in cellular neuroscience · 2024Article
- Tonic GABAThe Journal of neuroscience : the official journal of the Society for Neuroscience · 2021Article
- Layer-specific cholinergic modulation of synaptic transmission in layer 2/3 pyramidal neurons of rat visual cortex.The Korean journal of physiology & pharmacology : official journal of the Korean Physiological Society and the Korean Society of Pharmacology · 2019Article
- Enhancement of postsynaptic GABAA and extrasynaptic NMDA receptor-mediated responses in the barrel cortex of Mecp2-null mice.Journal of neurophysiology · 2016Article
- Brief Dark Exposure Reduces Tonic Inhibition in Visual Cortex.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2015Article
- Phasic and Tonic Inhibition are Maintained Respectively by CaMKII and PKA in the Rat Visual Cortex.The Korean journal of physiology & pharmacology : official journal of the Korean Physiological Society and the Korean Society of Pharmacology · 2014Article
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Authors and funding
5 authors.
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Abstract
Tonic inhibition mediated by persistent activation of γ-aminobutyric acidA (GABAA) receptors by ambient GABA plays a crucial role in the regulation of network excitability and neuronal signal processing. Varying degrees in the strength of tonic inhibition were detected across different cell types throughout the brain. Since sensory information flows through cortical layers in a specific order, the characteristics of tonic inhibition in different cortical layers are of interest. Therefore, we examined the properties of tonic inhibition in pyramidal neurons (PyNs) throughout the rat visual cortex. Layer 2/3 PyNs and burst-spiking PyNs in layers 5 and 6 showed prominent tonic GABAA currents. Tonic GABAA currents in layer 4 star PyNs and regular-spiking PyNs in layers 5 and 6 were much weaker. The magnitude of tonic currents correlated well with the inhibition of spike generation. The amplitude of tonic GABAA currents measured with bicuculline and gabazine, the two different GABAA receptor blockers, did not differ. The differences in the expression levels of extrasynaptic GABAA receptors might be the major contributor to the differences in tonic GABAA currents among cell types. Furthermore, α5 subunits might contribute significantly to tonic currents in infragranular burst-spiking PyNs, especially in layer 5. These results suggest that ambient GABA might exert differential effects on the neuronal integration in a layer- and cell-type-specific manner and thus contribute to the processing of sensory properties by selectively tuning the signals flowing through the visual cortex.
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