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Deciphering functional roles of synaptic plasticity and
Neural systems in many species comprise of different neural circuits (Beierlein, 2003) and their connection and function are highly experience-dependent.The specific period during early development after eye opening for mice at postnatal day P14-P20 to the critical period(CP) onset (P20-21) involves changes of the intrinsic neuronal …
mGluR-dependent persistent firing in entorhinal cortex …
Persistent firing is believed to be a crucial mechanism for memory function including working memory. Recent in vivo and in vitro findings suggest an involvement of metabotropic glutamate receptors (mGluRs) in persistent firing. Using whole-cell patch-recording techniques in a rat entorhinal cortex …
5-HT1A receptor agonists enhance pyramidal cell firing in
5-HT(1A) receptors (5-HT1AR) are expressed by pyramidal and γ-aminobutyric acidergic (GABAergic) neurons in medial prefrontal cortex (mPFC). Endogenous serotonin inhibits mPFC pyramidal neurons via 5-HT1AR while 5-HT1AR agonists, given systemically, paradoxically excite ventral tegmental area-projec …
Modelling Spontaneous Firing Activity of the Motor Cortex …
Computational models of cortical activity can provide insight into the mechanisms of higher-order processing in the human brain including planning, perception and the control of movement. Activity in the cortex is ongoing even in the absence of sensory input or discernable movements and is thought to be linked to the topology of …
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Context-dependent relationships between locus coeruleus firing …
Simultaneous recordings in brainstem and cortex, combined with pupillometry, show that changes in coordinated activity in anterior cingulate cortex are related to distinct patterns of pupil-linked activation of the locus coeruleus-norepinephrine system.
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In order to have consciousness cognition, neurons which Connect the brainstem to the cortex must be firing, called the Areticular actreating system Bd execepration counter center dcerebral aquadlct Denterial plate an individual who is in a prolonged coma, the initial auld be primarily be caused by all of the following areas, Except A Reticular activating system …
Relating Neuronal Firing Patterns to Functional …
Author Summary Neurons, or nerve cells in the brain, communicate with each other using stereotyped electric pulses, called spikes. It is believed that neurons convey information mainly through the frequency of the transmitted spikes, called the firing rate. In addition, neurons may communicate some information through the finer temporal …
Threshold firing frequency-current relationships of neurons …
Neurons and dynamical models of spike generation display two different types of threshold behavior, with steady current stimulation: type 1 [the firing frequency vs. current (f-I) relationship is continuous at threshold) and type 2 (discontinuous f-I)]. The dynamics at threshold can have profound ef …
Sequential Firing Codes for Time in Rodent Medial Prefrontal …
A subset of hippocampal neurons, known as "time cells" fire sequentially for circumscribed periods of time within a delay interval. We investigated whether medial prefrontal cortex (mPFC) also contains time cells and whether their qualitative properties differ from those in the hippocampus and striatum. We studied the firing correlates of ...
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Context-dependent relationships between locus coeruleus …
Ascending neuromodulatory projections from the locus coeruleus (LC) affect cortical neural networks via the release of norepinephrine (NE). However, the exact nature of these neuromodulatory effects on neural activity patterns in vivo is not well understood. Here, we show that in awake monkeys, LC a …
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Phase-of-firing coding of natural visual stimuli in primary …
We investigated the hypothesis that neurons encode rich naturalistic stimuli in terms of their spike times relative to the phase of ongoing network fluctuations rather than only in terms of their spike count. We recorded local field potentials (LFPs) and multiunit spikes from the primary visual cort …
Frontiers | Uncorrelated Neural Firing in Mouse Visual Cortex …
Synchronous firing among the elements of forming circuits is critical for stabilization of synapses. Understanding the nature of these local network interactions during development can inform models of circuit formation. Within cortex, spontaneous activity changes throughout development. Unlike the adult, early spontaneous activity occurs in …
Interneuron-specific gamma synchronization indexes cue
A fast spiking interneuron sub-type in medial and lateral prefrontal cortex fires and gamma-synchronizes prominently during adaptive learning of reward values when outcomes are uncertain and choice options have similar values.
Involvement of TRPC4 and 5 Channels in Persistent Firing in …
1. Introduction. Persistent firing, a repetitive neural spiking that persists beyond the triggering stimulus, has been observed in vivo during working memory and temporal association tasks in both humans and animals [1,2,3,4,5,6,7,8].It is believed that persistent firing supports short-term retention of information during these tasks typically for up to …
Distributed representations of temporal stimulus associations …
The prefrontal cortex has been implicated in various cognitive processes, including working memory, executive control, decision making, and relational learning. One core computational requirement underlying all these processes is the integration of information across time. When rodents and rabbits a …
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The terminology around weathering steel can often be confusing. COR-TEN, Corten, weathering steel, and preweathered steel are all used, often interchangeably, to refer to the rust-hued steel that is used today for …
Control of clustered action potential firing in a …
The entorhinal cortex is a crucial component of our memory and spatial navigation systems and is one of the first areas to be affected in dementias featuring tau pathology, such as Alzheimer's disease and frontotemporal dementia. Electrophysiological recordings from principle cells of medial entorhi …
Correlated structure of neuronal firing in macaque visual …
Variability in cortical neural activity potentially limits sensory discriminations. Theoretical work shows that information required to discriminate two similar stimuli is limited by the correlation structure of cortical variability. We investigated these information-limiting correlations by recording simultaneously from visual cortical areas primary visual cortex …
The Contribution of AMPA and NMDA Receptors to …
Introduction. Working memory refers to the ability to store and manipulate information over short periods of time, on the order of seconds (Baddeley, 2012).In many situations, we have to briefly remember what we perceived, and we then store this information in working memory; whereas in other situations, working memories are …
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Persistent neuronal firing in primary somatosensory cortex in …
Previous studies suggested that primary somatosensory (SI) neurons in well-trained monkeys participated in the haptic-haptic unimodal delayed matching-to-sample (DMS) task. In this study, 585 SI neurons were recorded in monkeys performing a task that was identical to that in the previous studies but …
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Coupling Between Neuronal Firing, Field Potentials, and …
Abstract. Functional magnetic resonance imaging (fMRI) is an important tool for investigating human brain function, but the relationship between the hemodynamically based fMRI signals in the human brain and the underlying neuronal activity is unclear. We recorded single unit activity and local field potentials in auditory cortex of two ...