Search results for: Victoria Booth

Items from 1 to 20 out of 23 results

article

Special issue on cholinergic signalling

Howard J. Gritton, Victoria Booth, William M. Howe

European Journal of Neuroscience > 59 > 9 > 2131 - 2137

article

Modelling learning in Caenorhabditis elegans chemosensory and locomotive circuitry for T‐maze navigation

Bennet G. Sakelaris, Zongyu Li, Jiawei Sun, Shurjo Banerjee, more

European Journal of Neuroscience > 55 > 2 > 354 - 376

Recently, a new type of Caenorhabditis elegans associative learning was reported, where nematodes learn to reach a target arm in an empty T‐maze, after they have successfully located reward (food) in the same side arm of a similar, baited, training maze. Here, we present a simplified mathematical model of C. elegans chemosensory and locomotive circuitry that replicates C. elegans navigation in a T‐maze...

article

Phasic cholinergic signaling promotes emergence of local gamma rhythms in excitatory–inhibitory networks

Yiqing Lu, Martin Sarter, Michal Zochowski, Victoria Booth

European Journal of Neuroscience > 52 > 6 > 3545 - 3560

Recent experimental results have shown that the detection of cues in behavioral attention tasks relies on transient increases of acetylcholine (ACh) release in frontal cortex and cholinergically driven oscillatory activity in the gamma frequency band (Howe et al. Journal of Neuroscience, 2017, 37, 3215). The cue‐induced gamma rhythmic activity requires stimulation of M1 muscarinic receptors. Using...

article

Network and cellular mechanisms underlying heterogeneous excitatory/inhibitory balanced states

Jiaxing Wu, Sara J. Aton, Victoria Booth, Michal Zochowski

European Journal of Neuroscience > 51 > 7 > 1624 - 1641

Recent work has explored spatiotemporal relationships between excitatory (E) and inhibitory (I) signaling within neural networks, and the effect of these relationships on network activity patterns. Data from these studies have indicated that excitation and inhibition are maintained at a similar level across long time periods and that excitatory and inhibitory currents may be tightly synchronized....

article

26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3

Adam J. H. Newton, Alexandra H. Seidenstein, Robert A. McDougal, Alberto Pérez-Cervera, more

BMC Neuroscience > 2017 > 18 > 1 > 1-82

About this supplement These abstracts have been published as part of BMC Neuroscience Volume 18 Supplement 1, 2017. The full contents of the supplement are available online at https://bmcneurosci.biomedcentral.com/articles/supplements/volume-18-supplement-1 . Please note that this is part 2 of 3.

article

Network burst dynamics under heterogeneous cholinergic modulation of neural firing properties and heterogeneous synaptic connectivity

Scott Knudstrup, Michal Zochowski, Victoria Booth, Panayiota Poirazi

European Journal of Neuroscience > 43 > 10 > 1321 - 1339

The characteristics of neural network activity depend on intrinsic neural properties and synaptic connectivity in the network. In brain networks, both of these properties are critically affected by the type and levels of neuromodulators present. The expression of many of the most powerful neuromodulators, including acetylcholine (ACh), varies tonically and phasically with behavioural state, leading...

article

The role of adaptation current in synchronously firing inhibitory neural networks with various topologies

Scott Rich, Victoria Booth, Michal Zochowski

BMC Neuroscience > 2015 > 16 > 1 > 1-2

article

Physiologically-based modeling of sleep–wake regulatory networks

Victoria Booth, Cecilia G. Diniz Behn

Mathematical Biosciences > 2014 > 250 > Complete > 54-68

Mathematical modeling has played a significant role in building our understanding of sleep–wake and circadian behavior. Over the past 40years, phenomenological models, including the two-process model and oscillator models, helped frame experimental results and guide progress in understanding the interaction of homeostatic and circadian influences on sleep and understanding the generation of rapid...

chapter

Neural network modulation, dynamics, and plasticity

Christian G. Fink, Michal Zochowski, Victoria Booth

2013 IEEE Global Conference on Signal and Information Processing > 843 - 846

2013 IEEE Global Conference on Signal and Information Processing (GlobalSIP)

Brain networks are unique in their capacity to modify synaptic structure while at the same time modulating neuronal firing properties. We investigated the interaction of these plastic network properties with overall network dynamics in large, biophysical neuronal network models. We modulated firing properties of individual neurons by simulating changing levels of acetylcholine (ACh), a key neurotransmitter...

chapter

Modeling the temporal architecture of rat sleep-wake behavior

Cecilia G. Diniz Behn, Victoria Booth

2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society > 4713 - 4716

2011 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society

The fine architecture of sleep-wake behavior shows a distinct dynamic structure with distributions of rat sleep and wake bout durations displaying qualitatively different profiles. Wake bout durations follow a power-law relation whereas sleep bout durations are exponentially distributed. We show that a physiologically-based sleep-wake regulatory network model with an underlying deterministic structure...

article

Co-existent activity patterns in inhibitory neuronal networks with short-term synaptic depression

Amitabha Bose, Victoria Booth

Journal of Theoretical Biology > 2011 > 272 > 1 > 42-54

A network of two neurons mutually coupled through inhibitory synapses that display short-term synaptic depression is considered. We show that synaptic depression expands the number of possible activity patterns that the network can display and allows for co-existence of different patterns. Specifically, the network supports different types of n–m anti-phase firing patterns, where one neuron fires...

article

Open-source logic-based automated sleep scoring software using electrophysiological recordings in rats

Brooks A. Gross, Christine M. Walsh, Apurva A. Turakhia, Victoria Booth, more

Journal of Neuroscience Methods > 2009 > 184 > 1 > 10-18

Manual state scoring of physiological recordings in sleep studies is time-consuming, resulting in a data backlog, research delays and increased personnel costs. We developed MATLAB-based software to automate scoring of sleep/waking states in rats, potentially extendable to other animals, from a variety of recording systems. The software contains two programs, Sleep Scorer and Auto-Scorer, for manual...

article

Carbon-branched carbohydrate chirons: synthesis of C-3 and C-4-branched sugar lactones derived from d-erythronolactone

Sarah F. Jenkinson, K. Victoria Booth, Amalia M. Estévez Reino, Graeme Horne, more

Tetrahedron: Asymmetry > 2009 > 20 > 20 > 2357-2367

Two carbon chain extensions using a Wittig reaction on both a 1-deoxy ribulose derivative and a C-2-branched erythrose derivative are reported. Subsequent dihydroxylation resulted in the synthesis of C-3 and C-4 methyl-branched sugar lactones, the useful synthetic building blocks. Control of the stereoselectivity of both the Wittig reaction and the dihydroxylation is investigated, and 3-C-methyl and...

article

Doubly carbon-branched pentoses: synthesis of both enantiomers of 2,4-di-C-methyl arabinose and 2-deoxy-2,4-di-C-methyl arabinose using only acetonide protection

K. Victoria Booth, Sarah F. Jenkinson, Daniel Best, Fernando Fernández Nieto, more

Tetrahedron Letters > 2009 > 50 > 36 > 5088-5093

An acetonide is the only protecting group used in the synthesis of both the enantiomers of 2,4-di-C-methyl arabinose and 2-deoxy-2,4-di-C-methyl arabinose via the enantiomeric 3-C-methyl-l-erythronolactone [from 2-C-methyl-d-ribono-lactone or d-ribose] and 3-C-methyl-d-erythronolactone [from d-tagatose or l-ribose]. NMR studies on unprotected C-methyl arabinoses show that methyl branching significantly...

article

Understanding effects on excitability of simulated I _h modulation in simple neuronal models

Anne Lippert, Victoria Booth

Biological Cybernetics > 2009 > 101 > 4 > 297-306

The hyperpolarization-activated, inward, mixed cation current, I _h, appears in a wide variety of cells in the nervous system, contributes to diverse neuronal properties, and is up-regulated by a number of important neurotransmitters. Up-regulation of I _h is usually associated with an excitability-enhancing depolarization of resting membrane potential and an excitability-depressing shunting effect...

article

Causal entropies—A measure for determining changes in the temporal organization of neural systems

Jack Waddell, Rhonda Dzakpasu, Victoria Booth, Brett Riley, more

Journal of Neuroscience Methods > 2007 > 162 > 1-2 > 320-332

We propose a novel measure to detect temporal ordering in the activity of individual neurons in a local network, which is thought to be a hallmark of activity-dependent synaptic modifications during learning. The measure, called causal entropy, is based on the time-adaptive detection of asymmetries in the relative temporal patterning between neuronal pairs. We characterize properties of the measure...

article

Modeling motoneurons after spinal cord injury: persistent inward currents and plateau potentials

Joe Graham, Victoria Booth, Ranu Jung

Neurocomputing > 2005 > 65-66 > Complete > 719-726

A single-compartment conductance-based computational model to mimic the behavior of rat tail motoneurons after acute and chronic spinal cord injury (SCI) was developed. The model includes a calcium-dependent potassium current, IK(Ca), that contributes to after hyperpolarizations. In the chronic SCI model, the presence of sodium and calcium persistent inward currents (PICs) causes plateau potentials...

article

Short-term synaptic dynamics promote phase maintenance in multi-phasic rhythms

Farzan Nadim, Victoria Booth, Amitabha Bose, Yair Manor

Neurocomputing > 2003 > 52-54 > Complete > 79-87

We show that in an inhibitory rhythmic network synaptic depression promotes phase constancy. As cycle period increases, the synapse recovers from depression and becomes more effective in delaying the postsynaptic cell. As a result, the delay between the pre- and postsynaptic bursts increases as cycle period increases. We discuss the dependence of the bursting phase of the postsynaptic cell on the...

article

Transitions between different synchronous firing modes using synaptic depression

Victoria Booth, Amitabha Bose

Neurocomputing > 2002 > 44-46 > 61-67

Bistability of different synchronous firing patterns arising in networks of pyramidal cells and interneurons which include depressing synapses is demonstrated. The firing modes differ in their frequencies, in the type of firing pattern and in their degree of synchrony. The network elements governing the frequency of each mode are identified and ways to transition between modes are discussed.

article

Regulating firing rate of networks of pyramidal cells

Victoria Booth, Amitabha Bose

Neurocomputing > 2001 > 38-40 > 497-504

In a minimal network model consisting of two pyramidal cells and one interneuron, we show how excitation and inhibition cooperate to produce firing rate changes in pyramidal cells that are consistent with observed place cell firing in region CA3 of the hippocampus. We show that inhibition from a common interneuron can synchronize networks of pyramidal cells with no direct connections. Moreover, recurrent...

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INFONA - science communication portal

Search results for: Victoria Booth

Special issue on cholinergic signalling

Modelling learning in Caenorhabditis elegans chemosensory and locomotive circuitry for T‐maze navigation

Phasic cholinergic signaling promotes emergence of local gamma rhythms in excitatory–inhibitory networks

Network and cellular mechanisms underlying heterogeneous excitatory/inhibitory balanced states

26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3

Network burst dynamics under heterogeneous cholinergic modulation of neural firing properties and heterogeneous synaptic connectivity

The role of adaptation current in synchronously firing inhibitory neural networks with various topologies

Physiologically-based modeling of sleep–wake regulatory networks

Neural network modulation, dynamics, and plasticity

Modeling the temporal architecture of rat sleep-wake behavior

Co-existent activity patterns in inhibitory neuronal networks with short-term synaptic depression

Open-source logic-based automated sleep scoring software using electrophysiological recordings in rats

Carbon-branched carbohydrate chirons: synthesis of C-3 and C-4-branched sugar lactones derived from d-erythronolactone

Doubly carbon-branched pentoses: synthesis of both enantiomers of 2,4-di-C-methyl arabinose and 2-deoxy-2,4-di-C-methyl arabinose using only acetonide protection

Understanding effects on excitability of simulated I _h modulation in simple neuronal models

Causal entropies—A measure for determining changes in the temporal organization of neural systems

Modeling motoneurons after spinal cord injury: persistent inward currents and plateau potentials

Short-term synaptic dynamics promote phase maintenance in multi-phasic rhythms

Transitions between different synchronous firing modes using synaptic depression

Regulating firing rate of networks of pyramidal cells

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