Effects of uniform extracellular DC electric fields on excitability in rat
... orthodromic stimulation, and shifted their initiation site along the apical dendrites. Large electric fields could trigger neuronal firing and epileptiform activity, and induce long-term (>1 s) changes in neuronal excitability. Electric fields perpendicular to the apical–dendritic axis did not induc ...
... orthodromic stimulation, and shifted their initiation site along the apical dendrites. Large electric fields could trigger neuronal firing and epileptiform activity, and induce long-term (>1 s) changes in neuronal excitability. Electric fields perpendicular to the apical–dendritic axis did not induc ...
Computation with Spikes in a Winner-Take-All Network
... asynchronous and time-continuous computation inherent in biological nervous systems. Neuron models with analog inputs and analog outputs can be converted into models with spiking output if a thresholding operating is introduced to the neuron. Coultrip, Granger, and Lynch (1992) is an early theoretic ...
... asynchronous and time-continuous computation inherent in biological nervous systems. Neuron models with analog inputs and analog outputs can be converted into models with spiking output if a thresholding operating is introduced to the neuron. Coultrip, Granger, and Lynch (1992) is an early theoretic ...
PHS 398 (Rev. 9/04), Biographical Sketch Format Page
... 4. Electrophysiological Assessment of Cerebellar Injury: The primary objective of this project was to establish the use of electrophysiological method, the electro-corticogram (ECoG) technique, for investigation of mild traumatic brain injuries in experimental animals. The changes of excitability in ...
... 4. Electrophysiological Assessment of Cerebellar Injury: The primary objective of this project was to establish the use of electrophysiological method, the electro-corticogram (ECoG) technique, for investigation of mild traumatic brain injuries in experimental animals. The changes of excitability in ...
Autonomic Nervous System
... innervates often receive additional afferent innervation. These afferent fibers are important in reflex autonomic activity (e.g., regulation of blood pressure) and conscious sensation (discomfort, pain, etc.) B. Subdivisions of the ANS-Defined by location of cell body of preganglionic neuron 1. Symp ...
... innervates often receive additional afferent innervation. These afferent fibers are important in reflex autonomic activity (e.g., regulation of blood pressure) and conscious sensation (discomfort, pain, etc.) B. Subdivisions of the ANS-Defined by location of cell body of preganglionic neuron 1. Symp ...
B - CommuniGate Pro uni
... co-cultures was determined using immunohistochemistry. In the cortex parvalbumin-positive and calbindin-positive cells, which resembled those seen in vivo, had laminar distributions. In the striatum, strongly stained parvalbumin-positive cells resembling striatal GABAerglc interneurons and cholinerg ...
... co-cultures was determined using immunohistochemistry. In the cortex parvalbumin-positive and calbindin-positive cells, which resembled those seen in vivo, had laminar distributions. In the striatum, strongly stained parvalbumin-positive cells resembling striatal GABAerglc interneurons and cholinerg ...
Neural analysis of sound frequency in insects
... properties of the tympanal membrane and associated structures are such that different sound frequencies cause different regions of the membrane to vibrate most strongly. Auditory sensilla attach at different sites on the membrane, and thus receptor neurons acquire different frequency sensitivity. In ...
... properties of the tympanal membrane and associated structures are such that different sound frequencies cause different regions of the membrane to vibrate most strongly. Auditory sensilla attach at different sites on the membrane, and thus receptor neurons acquire different frequency sensitivity. In ...
Auto-structure of presynaptic activity defines postsynaptic firing
... interspike intervals. The Fano factor of the coincidence count distribution for pairs of processes with identical spike-rates is represented in Fig. 3A for several coefficients of variations (CV ). High values of F FC indicate strong clustering. To describe the changes of F Fc we will use the Poisso ...
... interspike intervals. The Fano factor of the coincidence count distribution for pairs of processes with identical spike-rates is represented in Fig. 3A for several coefficients of variations (CV ). High values of F FC indicate strong clustering. To describe the changes of F Fc we will use the Poisso ...
Extended PDF
... neurogenic phase, RGPs are believed to divide asymmetrically to produce neurons either directly or indirectly through transient amplifying progenitors, such as intermediate progenitors (IPs) (Florio and Huttner, 2014). Consecutive waves of neurogenesis lead to the formation of cortical layers in an ...
... neurogenic phase, RGPs are believed to divide asymmetrically to produce neurons either directly or indirectly through transient amplifying progenitors, such as intermediate progenitors (IPs) (Florio and Huttner, 2014). Consecutive waves of neurogenesis lead to the formation of cortical layers in an ...
Basics of electromagnetic field mapping
... • In EEG, dipoles lay between positive and negative poles of the field. However, since the electrode grid does not cover the entire head, one or both poles of a dipole might lie outside the electrode grid and are therefore not well represented. This may easily yield false conclusions, both if the da ...
... • In EEG, dipoles lay between positive and negative poles of the field. However, since the electrode grid does not cover the entire head, one or both poles of a dipole might lie outside the electrode grid and are therefore not well represented. This may easily yield false conclusions, both if the da ...
Skeletal System
... sweaty skin; and dilated eyes are signs Also changes in brain wave patterns Its function is to provide the optimal conditions for an appropriate response to some threat (run / see / think) ...
... sweaty skin; and dilated eyes are signs Also changes in brain wave patterns Its function is to provide the optimal conditions for an appropriate response to some threat (run / see / think) ...
Forecasting & Demand Planner Module 4 – Basic Concepts
... The spikes travelling along the axon of the pre-synaptic neuron trigger the release of neurotransmitter substances at the synapse. The neurotransmitters cause excitation or inhibition in the dendrite of the post-synaptic neuron. The integration of the excitatory and inhibitory signals may produce sp ...
... The spikes travelling along the axon of the pre-synaptic neuron trigger the release of neurotransmitter substances at the synapse. The neurotransmitters cause excitation or inhibition in the dendrite of the post-synaptic neuron. The integration of the excitatory and inhibitory signals may produce sp ...
Brain Stem Catecholamine Mechanisms in Tonic and
... been elaborated on only over the past 20 years. The evidence for its role in control of AP stems from a variety of physiological and anatomical studies.5"8 In brief: (1) The NTS has been demonstrated by retrograde transport techniques to be the site of termination of afferents that arise from cardio ...
... been elaborated on only over the past 20 years. The evidence for its role in control of AP stems from a variety of physiological and anatomical studies.5"8 In brief: (1) The NTS has been demonstrated by retrograde transport techniques to be the site of termination of afferents that arise from cardio ...
Specification of Cerebral Cortical Areas
... remarkable product of brain evolution, not only because it makes up two-thirds of the neuronal mass and contains about three-quarters of all our synapses, but also because it is the structure that most distinctively sets us apart from other species. One of the most prominent features of the cerebral ...
... remarkable product of brain evolution, not only because it makes up two-thirds of the neuronal mass and contains about three-quarters of all our synapses, but also because it is the structure that most distinctively sets us apart from other species. One of the most prominent features of the cerebral ...
nervous tissue, 030717
... Unipolar neurons have dendrites and an axon fused together to form a continuous process—they are found in certain sensory receptors of the skin. Neuronal processes = dendrites and axons. ...
... Unipolar neurons have dendrites and an axon fused together to form a continuous process—they are found in certain sensory receptors of the skin. Neuronal processes = dendrites and axons. ...
Branching dendrites with active spines
... role of dendritic geometry in influencing firing patterns may be systematically investigated. Models of dendrites are typically formulated using deterministic equations, thereby ignoring the different noise sources encountered by the input signals that impinge on dendrites. These noise sources inclu ...
... role of dendritic geometry in influencing firing patterns may be systematically investigated. Models of dendrites are typically formulated using deterministic equations, thereby ignoring the different noise sources encountered by the input signals that impinge on dendrites. These noise sources inclu ...
Visual circuits in flies: beginning to see the whole picture
... form behaviorally-relevant perception. The fly Drosophila melanogaster, a powerful model for developmental biologists, has recently emerged as a prolific system to elucidate complex problems in functional neuroscience, especially sensory perception. This ‘simple’ organism is capable of many sophisti ...
... form behaviorally-relevant perception. The fly Drosophila melanogaster, a powerful model for developmental biologists, has recently emerged as a prolific system to elucidate complex problems in functional neuroscience, especially sensory perception. This ‘simple’ organism is capable of many sophisti ...
TESIS DOCTORAL Dynamics and Synchronization in Neuronal Models
... century with his neuron doctrine. Ramon y Cajal broke down the widely believed concept that the nervous system was a reticulum or a continuum meshwork. Using a histological staining technique, Cajal could resolve in detail the structure and concluded that the nervous system was composed of individua ...
... century with his neuron doctrine. Ramon y Cajal broke down the widely believed concept that the nervous system was a reticulum or a continuum meshwork. Using a histological staining technique, Cajal could resolve in detail the structure and concluded that the nervous system was composed of individua ...
fluctuations in somatosensory responsiveness and baseline firing
... administered in the second group of experiments (N⫽30 neurons). In the third group, injection manipulations with the empty device on the rat’s head were simulated (N⫽24 neurons). The latter two groups did not statistically differ from each other in any parameter, which made it possible to combine th ...
... administered in the second group of experiments (N⫽30 neurons). In the third group, injection manipulations with the empty device on the rat’s head were simulated (N⫽24 neurons). The latter two groups did not statistically differ from each other in any parameter, which made it possible to combine th ...
Methods of Studying The Nervous System
... Electrical Recording Methods • Multiple unit recording – Multiple unit recording provides an indication of the rate of firing of many neurons in the general vicinity of the electrode tip – An electrode larger than a microelectrode picks up the action potentials from many nearby neurons – The signal ...
... Electrical Recording Methods • Multiple unit recording – Multiple unit recording provides an indication of the rate of firing of many neurons in the general vicinity of the electrode tip – An electrode larger than a microelectrode picks up the action potentials from many nearby neurons – The signal ...
What is Psychology?
... movement behind closed eyelids, loss of muscle tone, and dreaming. • Activation-Synthesis Theory: Theory that dreaming results from cortical synthesis and interpretation of neural signals triggered by activity in the lower part of the brain. Wade and Tavris © 2005 Prentice Hall ...
... movement behind closed eyelids, loss of muscle tone, and dreaming. • Activation-Synthesis Theory: Theory that dreaming results from cortical synthesis and interpretation of neural signals triggered by activity in the lower part of the brain. Wade and Tavris © 2005 Prentice Hall ...
Connections of the Hypothalamus
... control column. Note two classes of output. One consists of ‘descending’ projections to brainstem, and in some cases spinal, regions associated with the somatic and/or autonomic motor systems, ‘ascending’ projections to thalamocortical loops, and projections to the adjacent lateral hypothalamic area ...
... control column. Note two classes of output. One consists of ‘descending’ projections to brainstem, and in some cases spinal, regions associated with the somatic and/or autonomic motor systems, ‘ascending’ projections to thalamocortical loops, and projections to the adjacent lateral hypothalamic area ...
doc midterm 1 chapter notes
... René Descartes, said that animals (including humans) are machines, and once set on this earth behave without any divine intervention. He defined the term reflex: An automatic, stereotyped movement that is produced as a direct result of a stimulus. He said that energy coming from an outside source wo ...
... René Descartes, said that animals (including humans) are machines, and once set on this earth behave without any divine intervention. He defined the term reflex: An automatic, stereotyped movement that is produced as a direct result of a stimulus. He said that energy coming from an outside source wo ...
Electrical Synapses in the Thalamic Reticular Nucleus
... apart (Fig. 1 B). Four TRN cells were injected with neurobiotin, and their morphology was reconstructed. In all cases, only a single stained neuron was recovered (Fig. 1C). Each cell had an ovoid soma and a long primary axon that emanated dorsolaterally and coursed for several hundred micrometers. T ...
... apart (Fig. 1 B). Four TRN cells were injected with neurobiotin, and their morphology was reconstructed. In all cases, only a single stained neuron was recovered (Fig. 1C). Each cell had an ovoid soma and a long primary axon that emanated dorsolaterally and coursed for several hundred micrometers. T ...
Monkey and humans exhibit similar motion
... receptive fields increases. This rapid increase in spike discharge plateaus at relatively low dot densities (Snowden et al. 1991, 1992). When additional dots moving in the neurons’ anti-preferred direction are added, the resulting density-tuning functions indicate a division-like inhibitory interact ...
... receptive fields increases. This rapid increase in spike discharge plateaus at relatively low dot densities (Snowden et al. 1991, 1992). When additional dots moving in the neurons’ anti-preferred direction are added, the resulting density-tuning functions indicate a division-like inhibitory interact ...