An Investigation into the Role of Cortical Synaptic Depression in
... rather than postsynaptic activity. This offers a simple explanation for the puzzling experimental observation that masking is sometimes detected even in response to maskers that do not actually activate the target cell (Brosch and Schreiner, 1997). If masking is a result of transmitter depletion of ...
... rather than postsynaptic activity. This offers a simple explanation for the puzzling experimental observation that masking is sometimes detected even in response to maskers that do not actually activate the target cell (Brosch and Schreiner, 1997). If masking is a result of transmitter depletion of ...
Synchronization and coordination of sequences in two neural
... covers part of the phase space including the origin and all fixed points in which all trajectories intersect, i.e., ȧi兩S0 ⬍ 0, i = 1 , … , N. Thus such a system has no trajectories that escape to infinity. The WLC principle has made possible the interpretation, for example, of the hunting search be ...
... covers part of the phase space including the origin and all fixed points in which all trajectories intersect, i.e., ȧi兩S0 ⬍ 0, i = 1 , … , N. Thus such a system has no trajectories that escape to infinity. The WLC principle has made possible the interpretation, for example, of the hunting search be ...
ANN
... – The overall system then becomes a classifier, where the first network is unsupervised and the second one is supervised. – Clustering is useful for data compression and is an important aspect of data mining, i.e., finding patterns in complex data. ...
... – The overall system then becomes a classifier, where the first network is unsupervised and the second one is supervised. – Clustering is useful for data compression and is an important aspect of data mining, i.e., finding patterns in complex data. ...
neural and chemical regulation of respiration
... chemoreceptors is to detect changes in arterial PO2. However PC are relatively insensitive to changes in PO2. They respond when PO2 decreases to less than 60mmHg DECREASE IN ARTERIAL PO2 If arterial PO2 is b/w 100 and 60mmhg, the breathing rate is relatively constant. However, if arterial po2 is les ...
... chemoreceptors is to detect changes in arterial PO2. However PC are relatively insensitive to changes in PO2. They respond when PO2 decreases to less than 60mmHg DECREASE IN ARTERIAL PO2 If arterial PO2 is b/w 100 and 60mmhg, the breathing rate is relatively constant. However, if arterial po2 is les ...
A Computer Simulation of Olfactory Cortex with Functional
... records. For example, shock stimuli applied to the LOT are often used to elicit characteristic cortical evoked potentials in vivo 16,17,18. In the model we simulated this stimulus paradigm by simultaneously activating all 100 input fibers. Another measure of cortical activity used most successfully ...
... records. For example, shock stimuli applied to the LOT are often used to elicit characteristic cortical evoked potentials in vivo 16,17,18. In the model we simulated this stimulus paradigm by simultaneously activating all 100 input fibers. Another measure of cortical activity used most successfully ...
Dopamine control of pyramidal neuron activity in the primary motor
... the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No us ...
... the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No us ...
Event-Driven Simulation Scheme for Spiking Neural Networks Using
... is marked with the time instant when the source neuron fires the spike. The second one (the propagated event) is marked with the time instant when the spike reaches the target neuron. Most neurons have large synaptic divergences. In these cases, for each firing event, the simulation scheme produces ...
... is marked with the time instant when the source neuron fires the spike. The second one (the propagated event) is marked with the time instant when the spike reaches the target neuron. Most neurons have large synaptic divergences. In these cases, for each firing event, the simulation scheme produces ...
1. If a significant amount of Cl - entered the body of a motor neuron
... 33. Suppose the binding of neurotransmitter to receptors on a dendrite caused the opening of chemicallygated potassium channels. This would result in: a. The production of a postsynaptic potential b. The production of an inhibitory postsynaptic potential c. The efflux of potassium ions d. The membr ...
... 33. Suppose the binding of neurotransmitter to receptors on a dendrite caused the opening of chemicallygated potassium channels. This would result in: a. The production of a postsynaptic potential b. The production of an inhibitory postsynaptic potential c. The efflux of potassium ions d. The membr ...
lgn - cinpla
... feedback from the visual cortex. One would therefore expect the LGN to be more heavily influenced by visual cortex and the response not so similar to the input from retina. The role of this massive feedback has not been clearly identified, and the functional role of the LGN is therefore poorly under ...
... feedback from the visual cortex. One would therefore expect the LGN to be more heavily influenced by visual cortex and the response not so similar to the input from retina. The role of this massive feedback has not been clearly identified, and the functional role of the LGN is therefore poorly under ...
Not all vosial categorization tasks require attention
... between the stimulus and the mask is about 50 ms. This suggests that cortical back-projections may not play a significant role when the time interval is in this range, and the model may therefore provide a satisfactory description of the feedforward path (Serre, Oliva & Poggio, "A feedforward theory ...
... between the stimulus and the mask is about 50 ms. This suggests that cortical back-projections may not play a significant role when the time interval is in this range, and the model may therefore provide a satisfactory description of the feedforward path (Serre, Oliva & Poggio, "A feedforward theory ...
Joint maps for orientation, eye, and direction preference in a self
... [11] S. Wimbauer, O. G. Wenisch, J. L. van Hemmen, and K. D. Miller, Development of spatiotemporal receptive fields of simple cells: II. Simulation and analysis, Biol. Cybernetics (1997), 77:463–477. [12] J. Wolfe and L. A. Palmer, Temporal diversity in the lateral geniculate nucleus of cat, Visual ...
... [11] S. Wimbauer, O. G. Wenisch, J. L. van Hemmen, and K. D. Miller, Development of spatiotemporal receptive fields of simple cells: II. Simulation and analysis, Biol. Cybernetics (1997), 77:463–477. [12] J. Wolfe and L. A. Palmer, Temporal diversity in the lateral geniculate nucleus of cat, Visual ...
Autonomic Nervous System (ANS)
... Sympathetic (Σ) division – “fight or flight” response Parasympathetic (PΣ) division – rest & repose (“conserve & restore”) response “dual innervation” – if organ receives both Σ & PΣ, one division excites, the other inhibits activity ...
... Sympathetic (Σ) division – “fight or flight” response Parasympathetic (PΣ) division – rest & repose (“conserve & restore”) response “dual innervation” – if organ receives both Σ & PΣ, one division excites, the other inhibits activity ...
nerve impulse
... At the peak of the action potential, the plasma membrane’s polarity is now the reverse of the resting membrane potential The reversal in polarity causes electrical current to flow between the site of the action potential and the adjacent regions of membrane and triggers voltage-gated Na+ channel ...
... At the peak of the action potential, the plasma membrane’s polarity is now the reverse of the resting membrane potential The reversal in polarity causes electrical current to flow between the site of the action potential and the adjacent regions of membrane and triggers voltage-gated Na+ channel ...
Neural Networks - School of Computer Science
... Adaptation to changing environment, and emergence of “intelligent” information processing functions by selforganisation, in response to data. ...
... Adaptation to changing environment, and emergence of “intelligent” information processing functions by selforganisation, in response to data. ...
Computational themes of peripheral processing
... an intensity-invariant representation of the amplitude modulation of the perceived signal and to increase the signalto-noise ratio. Next, the representation of the amplitude modulation of a signal by the auditory receptor neurons (Machens et al. 2001) needs to be processed in a way that higher level ...
... an intensity-invariant representation of the amplitude modulation of the perceived signal and to increase the signalto-noise ratio. Next, the representation of the amplitude modulation of a signal by the auditory receptor neurons (Machens et al. 2001) needs to be processed in a way that higher level ...
The Superior Olivary Nucleus and Its Influence on Nucleus
... to the interior of the cell. Recordings were aborted if the membrane potential of a neuron depolarized to 240 mV or greater, and /or if a ruptured patch “resealed” and could not be ruptured again. Data were low-pass filtered at 10 kHz and digitized with an I TC -16 (Instrutech, Great Neck, N Y) at 2 ...
... to the interior of the cell. Recordings were aborted if the membrane potential of a neuron depolarized to 240 mV or greater, and /or if a ruptured patch “resealed” and could not be ruptured again. Data were low-pass filtered at 10 kHz and digitized with an I TC -16 (Instrutech, Great Neck, N Y) at 2 ...
Optogenetics in a transparent animal: circuit function in the larval
... (OKR) where objects moving across the visual field evoke stereotyped tracking eye movements [6], the optomotor response (OMR) where larvae turn and swim in the direction of perceived whole-field visual motion [7], prey tracking and capture [8–11], as well as associative learning [12], and motor adap ...
... (OKR) where objects moving across the visual field evoke stereotyped tracking eye movements [6], the optomotor response (OMR) where larvae turn and swim in the direction of perceived whole-field visual motion [7], prey tracking and capture [8–11], as well as associative learning [12], and motor adap ...
Vibration Sensitivity and a Computational Theory for Prey
... amplitudes and variable frequency (Fig. 4). At low frequencies (;100 Hz) the receptor cells in one slit respond with phase-locked regularity relative to periodic motions of the stimulus. At higher frequencies (.500 Hz), unit responses (‘‘spikes’’) from the BCSS appear to remain phase-locked even tho ...
... amplitudes and variable frequency (Fig. 4). At low frequencies (;100 Hz) the receptor cells in one slit respond with phase-locked regularity relative to periodic motions of the stimulus. At higher frequencies (.500 Hz), unit responses (‘‘spikes’’) from the BCSS appear to remain phase-locked even tho ...