An inhibitory tone refers to a continuous baseline level of inhibitory synaptic activity in neurons
Neuroscientific studies confirm that an inhibitory tone represents a continuous baseline level of inhibitory synaptic or extrasynaptic activity that controls neuronal excitability and firing.
The retrieved papers consistently define and discuss tonic inhibition or inhibitory tone as a continuous, persistent baseline inhibitory current or activity present in neurons, matching the claim.
Kirsten Caesar, Kirsten Thomsen, Martin Lauritzen. Dissociation of spikes, synaptic activity, and activity-dependent increments in rat cerebellar blood flow by tonic synaptic inhibition. 2003. https://doi.org/10.1073/pnas.2635195100
Paper 2 discusses tonic synaptic inhibition as a baseline level of activity that regulates neuronal excitability.
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A. Hutt, L. Buhry. Study of GABAergic extra-synaptic tonic inhibition in single neurons and neural populations by traversing neural scales: application to propofol-induced anaesthesia. 2014. https://doi.org/10.1007/s10827-014-0512-x
Paper 4 examines tonic inhibitory currents and their steady-state modulation of neuronal firing rates.
K. Tossell, Rakesh A. Dodhia, B. Galet, Olga Tkachuk, M. Ungless. Tonic GABAergic inhibition, via GABAA receptors containing αβƐ subunits, regulates excitability of ventral tegmental area dopamine neurons. 2021. https://doi.org/10.1111/ejn.15133
Paper 6 describes tonic GABAergic input as a persistent ambient current that regulates baseline neuronal excitability.
G. Liddiard, P S Suryavanshi, J. Glykys. Enhancing GABAergic Tonic Inhibition Reduces Seizure-Like Activity in the Neonatal Mouse Hippocampus and Neocortex. 2024. https://doi.org/10.1523/JNEUROSCI.1342-23.2023
Paper 7 notes that neurons exhibit tonic inhibitory conductances that reduce baseline neuronal firing.
M. Wyroślak, K. Lebida, J. Mozrzymas. Induction of inhibitory synaptic plasticity enhances tonic current by increasing the content of α5-subunit containing GABAA receptors in hippocampal pyramidal neurons.. 2021. https://doi.org/10.1016/j.neuroscience.2021.05.020
Paper 8 states that tonic currents provide a persistent component of inhibitory drive representing the majority of total inhibitory charge.
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