Divided by Cytochrome Oxidase: A Map of the Projections from V1 to
... mirrored across the V1/V2 border, allowing one to match each V2 injection site with its field of labeled cells in V1. The lateral three injections landed squarely in thick stripes. The extent of the silver material around the injection sites provided an upper estimate of local tracer diffusion. In e ...
... mirrored across the V1/V2 border, allowing one to match each V2 injection site with its field of labeled cells in V1. The lateral three injections landed squarely in thick stripes. The extent of the silver material around the injection sites provided an upper estimate of local tracer diffusion. In e ...
Synaptic Integration in Rat Frontal Cortex Shaped by Network Activity
... neurons. A: example of simultaneous intracellular recording of a neuron together with several other neurons recorded extracellularly with 4 tetrodes inserted in close vicinity (⬍400 m). Top: 10 s of intracellular recording of a neocortical pyramidal neuron. Middle: 4 traces of simultaneous multiuni ...
... neurons. A: example of simultaneous intracellular recording of a neuron together with several other neurons recorded extracellularly with 4 tetrodes inserted in close vicinity (⬍400 m). Top: 10 s of intracellular recording of a neocortical pyramidal neuron. Middle: 4 traces of simultaneous multiuni ...
PDF file - Izhikevich
... neurons, each making thousands of synaptic contacts with its neighbors. Given the complexity of the connectivity inherent in cortical anatomy, efforts to describe the pattern of electrical activity in exact detail within even a highly localized population of cortical neurons would be extremely diffi ...
... neurons, each making thousands of synaptic contacts with its neighbors. Given the complexity of the connectivity inherent in cortical anatomy, efforts to describe the pattern of electrical activity in exact detail within even a highly localized population of cortical neurons would be extremely diffi ...
Lateral olfactory processing
... between nearest neighbors), but rather may serve a global gain control or normalization function. As the authors suggest, by maintaining the PN population in the middle of their dynamic range, where differences in odorant binding produce the biggest changes in neural activity, the global gain contro ...
... between nearest neighbors), but rather may serve a global gain control or normalization function. As the authors suggest, by maintaining the PN population in the middle of their dynamic range, where differences in odorant binding produce the biggest changes in neural activity, the global gain contro ...
Mirror Proposal 8-01 - USC - University of Southern California
... to propose models which place the mirror system in a broader perspective. As we have noted, our analysis of the monkey mirror system is to be seen as grounding efforts to understand the brain mechanisms underlying imitation in humans. For imitation, the key issue is the recognition of the structure ...
... to propose models which place the mirror system in a broader perspective. As we have noted, our analysis of the monkey mirror system is to be seen as grounding efforts to understand the brain mechanisms underlying imitation in humans. For imitation, the key issue is the recognition of the structure ...
Realistic synaptic inputs for model neural networks
... increase the cable length constant; which is inversely proportional to the square root of g , + c e E + e h H , gets smaller and eveutually it will become considerably less than L At this point the rurrent (3.10) grows only like Ell2 for large E Thus, even for this trivial geometry we see that cable ...
... increase the cable length constant; which is inversely proportional to the square root of g , + c e E + e h H , gets smaller and eveutually it will become considerably less than L At this point the rurrent (3.10) grows only like Ell2 for large E Thus, even for this trivial geometry we see that cable ...
Rebuilding Brain Circuitry with Living Micro
... appropriate targets remain a significant challenge. Therefore, we have recently developed micro-tissue engineered neural networks (micro-TENNs) as a strategy to simultaneously replace lost neurons and physically restore their long-distance axonal connections.37 Micro-TENNs consist of discrete neuron ...
... appropriate targets remain a significant challenge. Therefore, we have recently developed micro-tissue engineered neural networks (micro-TENNs) as a strategy to simultaneously replace lost neurons and physically restore their long-distance axonal connections.37 Micro-TENNs consist of discrete neuron ...
Simulations of neuromuscular control in lamprey swimming
... All simulations described so far have been aimed at mimicking the isolated spinal cord preparation. Under in vivo conditions, however, the rhythm generating circuitry is intimately linked to the actual movements of the body. Even if the spinal circuitry can operate without sensory feedback, it is ev ...
... All simulations described so far have been aimed at mimicking the isolated spinal cord preparation. Under in vivo conditions, however, the rhythm generating circuitry is intimately linked to the actual movements of the body. Even if the spinal circuitry can operate without sensory feedback, it is ev ...
Harding, G. W. and A. L. Towe. 1995. Neuron Response to Direct
... There is a thorough mix of inputs, such that neurons with strong inhibitory modulation reside near neurons with strong facilitatory modulation, and neurons that respond early to surface stimulation reside near those that respond late, or not at all, to the same stimulus. The simplicity of the respo ...
... There is a thorough mix of inputs, such that neurons with strong inhibitory modulation reside near neurons with strong facilitatory modulation, and neurons that respond early to surface stimulation reside near those that respond late, or not at all, to the same stimulus. The simplicity of the respo ...
A Neurodynamical cortical model of visual attention and
... Rolls, 1997), except that backprojections are incorporated, and the numbers of neurons are reduced for simplicity. These different modules allow combinations of features or inputs that occur in a given spatial arrangement to be learned by neurons, ensuring that higher-order spatial properties of the ...
... Rolls, 1997), except that backprojections are incorporated, and the numbers of neurons are reduced for simplicity. These different modules allow combinations of features or inputs that occur in a given spatial arrangement to be learned by neurons, ensuring that higher-order spatial properties of the ...
Multiplication and stimulus invariance in a looming
... have been shown to scale up or down in a multiplicative manner by varying a second contextual variable, for example attention to the stimulus. ...
... have been shown to scale up or down in a multiplicative manner by varying a second contextual variable, for example attention to the stimulus. ...
A computational account for the ontogeny of mirror neurons via
... Here, α is the learning rate, which determines how quickly the synaptic weights change. The brackets h and i denote that ∆wj,i is the average of all synaptic changes over a particular time. This articulates the idea that synaptic modification is a slow process. The rationale behind the formula is th ...
... Here, α is the learning rate, which determines how quickly the synaptic weights change. The brackets h and i denote that ∆wj,i is the average of all synaptic changes over a particular time. This articulates the idea that synaptic modification is a slow process. The rationale behind the formula is th ...
Processing in layer 4 of the neocortical circuit: new insights from
... the thalamus) as well as feed-forward excitation (directly from the thalamus). In both systems, the inhibition dominates, so that a cell can only be excited by stimuli that cause the effects of feed-forward excitation and inhibition to be separated in time; concurrent engagement of the two yields a ...
... the thalamus) as well as feed-forward excitation (directly from the thalamus). In both systems, the inhibition dominates, so that a cell can only be excited by stimuli that cause the effects of feed-forward excitation and inhibition to be separated in time; concurrent engagement of the two yields a ...
Binary neurons and networks
... When an axon of cell A is near enough to excite cell B and repeatedly or persistently takes part in firing it, some growth process or metabolic change takes place in one or both cells such that A's efficiency, as one of the cells firing B, is increased. (1949) Donald Hebb ...
... When an axon of cell A is near enough to excite cell B and repeatedly or persistently takes part in firing it, some growth process or metabolic change takes place in one or both cells such that A's efficiency, as one of the cells firing B, is increased. (1949) Donald Hebb ...
CV - Chris Gatti
... IARPA-sponsored Knowledge Discovery and Dissemination (KDD) program (Department of Defense) Developed graph fragment search algorithm for large (>1M nodes) attributed graphs ...
... IARPA-sponsored Knowledge Discovery and Dissemination (KDD) program (Department of Defense) Developed graph fragment search algorithm for large (>1M nodes) attributed graphs ...
BRAIN DYNAMICS AT MULTIPLE SCALES: CAN ONE RECONCILE
... been shown to exhibit chaotic persistence regarding parameter changes [Albers et al., 2006], a property that makes chaotic dynamics more common than exceptional [Sprott, 2008]. From a computational point of view, chaotic behavior or nearly chaotic regime (edge of chaos) can be optimal for informatio ...
... been shown to exhibit chaotic persistence regarding parameter changes [Albers et al., 2006], a property that makes chaotic dynamics more common than exceptional [Sprott, 2008]. From a computational point of view, chaotic behavior or nearly chaotic regime (edge of chaos) can be optimal for informatio ...
PDF
... The precise timing of events in the brain has consequences for intracellular processes, synaptic plasticity, integration and network behaviour. Pyramidal neurons, the most widespread excitatory neuron of the neocortex have multiple spike initiation zones, which interact via dendritic and somatic spi ...
... The precise timing of events in the brain has consequences for intracellular processes, synaptic plasticity, integration and network behaviour. Pyramidal neurons, the most widespread excitatory neuron of the neocortex have multiple spike initiation zones, which interact via dendritic and somatic spi ...
Synaptic pathways and inhibitory gates in the spinal cord dorsal horn
... promoter.22 However, what drives the activity of identified neurons with specific physiological roles in the dorsal horn has still not been well studied. We expect that genetic and/or neurochemical approaches to neuron identification will facilitate investigations of cell type-specific inhibitory co ...
... promoter.22 However, what drives the activity of identified neurons with specific physiological roles in the dorsal horn has still not been well studied. We expect that genetic and/or neurochemical approaches to neuron identification will facilitate investigations of cell type-specific inhibitory co ...
Cortico–basal ganglia circuit mechanism for a decision threshold in
... decision relies on downstream neurons’ ability to detect the event of threshold crossing and to pass this information to motor systems. It is also suggested that the threshold can be tuned to optimize the trade-off between speed and accuracy11,15. We thus ask the following questions: (i) what is the ...
... decision relies on downstream neurons’ ability to detect the event of threshold crossing and to pass this information to motor systems. It is also suggested that the threshold can be tuned to optimize the trade-off between speed and accuracy11,15. We thus ask the following questions: (i) what is the ...
Webb et al 2002 - User Web Areas at the University of York
... How does feedback from V1 and extraclassical stimulation modulate the activity of LGN neurons? To investigate the influence that feedback from the striate cortex has over extraclassical interactions in the LGN, we measured the modulated response of LGN neurons to gratings of a range of different con ...
... How does feedback from V1 and extraclassical stimulation modulate the activity of LGN neurons? To investigate the influence that feedback from the striate cortex has over extraclassical interactions in the LGN, we measured the modulated response of LGN neurons to gratings of a range of different con ...
neuron number decreases in the rat ventral, but not dorsal, medial
... frame containing appropriate ‘acceptance’ and ‘forbidden’ lines (area or Aframe of 45⫻45 m and height (h) of the section thickness excluding the 3 m thick guard zones) within each region of interest in order to obtain correct stereological estimates of cell density that were unbiased for cell size ...
... frame containing appropriate ‘acceptance’ and ‘forbidden’ lines (area or Aframe of 45⫻45 m and height (h) of the section thickness excluding the 3 m thick guard zones) within each region of interest in order to obtain correct stereological estimates of cell density that were unbiased for cell size ...
Hippocampal region - NeuronDevelopment.org
... cannot be accurately separated in Fig. I since they appear the same in Nissl stained preparations. Lorente de No (1934) divided CA3 into three Zones (a, b, and c) on the basis of the number of Shaffer collaterals (see below) supplied by the cells. Zones a and b cannot be distinguished in Nissl prep ...
... cannot be accurately separated in Fig. I since they appear the same in Nissl stained preparations. Lorente de No (1934) divided CA3 into three Zones (a, b, and c) on the basis of the number of Shaffer collaterals (see below) supplied by the cells. Zones a and b cannot be distinguished in Nissl prep ...
Evolution of central pattern generators and rhythmic behaviours
... in both species is composed of homologous neurons and muscles. However, these species differ in feeding behaviour: C. elegans feeds on bacteria with pharyngeal pumping [32], whereas P. pacificus has jaws that it uses to feed upon other nematodes, including C. elegans (figure 5a). Neurons that produc ...
... in both species is composed of homologous neurons and muscles. However, these species differ in feeding behaviour: C. elegans feeds on bacteria with pharyngeal pumping [32], whereas P. pacificus has jaws that it uses to feed upon other nematodes, including C. elegans (figure 5a). Neurons that produc ...