Differential Temporal Storage Capacity in the Baseline Activity of
... analysis if they maintained stable spike isolation throughout a recording session and their distribution histograms showed an absence of ISIs ⬍2 ms (the refractory period). In this study, we focused on baseline activity during the fixation period, before array presentation. Because the monkeys were ...
... analysis if they maintained stable spike isolation throughout a recording session and their distribution histograms showed an absence of ISIs ⬍2 ms (the refractory period). In this study, we focused on baseline activity during the fixation period, before array presentation. Because the monkeys were ...
Sound processing by local neural populations in the
... until recently, this has been technically impossible to do in vivo, because electrophysiological recording techniques cannot densely probe neurons at this spatial resolution, while optical techniques to monitor neural physiology have been limited to use at the surface of the tissue. Recently, this h ...
... until recently, this has been technically impossible to do in vivo, because electrophysiological recording techniques cannot densely probe neurons at this spatial resolution, while optical techniques to monitor neural physiology have been limited to use at the surface of the tissue. Recently, this h ...
Probabilistic models for spike trains of single neurons
... deviation and the mean) is smaller than 1, then the SS of the TRRP model is larger than 1. This does not apply, however, for mIMI models, which can also have a relatively narrow distribution of ISIs. We interpret these results and discuss their implications in section 8. In the second half of the pa ...
... deviation and the mean) is smaller than 1, then the SS of the TRRP model is larger than 1. This does not apply, however, for mIMI models, which can also have a relatively narrow distribution of ISIs. We interpret these results and discuss their implications in section 8. In the second half of the pa ...
The Optic Tectum of Birds - Department of Psychology
... Since the seminal studies of Hubel and Wiesel (1968), there has been an enormous amount of work on the visual system in mammals, particularly in primates, which are regarded as having a sophisticated visual system. However, an extensive amount of research into the avian visual system should not be o ...
... Since the seminal studies of Hubel and Wiesel (1968), there has been an enormous amount of work on the visual system in mammals, particularly in primates, which are regarded as having a sophisticated visual system. However, an extensive amount of research into the avian visual system should not be o ...
Duration Sensitivity to Other Response Properties of the Rat
... et al. 2000). Duration-selective neurons have only been found at or above the level of the inferior colliculus (IC) or its homolog in any of the species studied, so this form of neural filtering seems to be an emergent property that results from circuitry operating within the midbrain. The IC is inn ...
... et al. 2000). Duration-selective neurons have only been found at or above the level of the inferior colliculus (IC) or its homolog in any of the species studied, so this form of neural filtering seems to be an emergent property that results from circuitry operating within the midbrain. The IC is inn ...
(2012) Prediction of economic choice by primate amygdala neurons
... reward amounts, which were indicated by pretrained visual cues. Both animals consistently chose the fixed reward when it exceeded the saved magnitude (Fig. 1E) (P < 0.001, Mann–Whitney test). This result suggested that monkeys kept track of accumulated rewards over successive save trials and based th ...
... reward amounts, which were indicated by pretrained visual cues. Both animals consistently chose the fixed reward when it exceeded the saved magnitude (Fig. 1E) (P < 0.001, Mann–Whitney test). This result suggested that monkeys kept track of accumulated rewards over successive save trials and based th ...
PERSPECTIVES
... both in terms of goal (for example, grasping) and in terms of how the goal is achieved (for example, precision grip). However, for most neurons, the congruence is broader and is confined to the goal of the action. These broadly congruent neurons are of particular interest, because they seem to gener ...
... both in terms of goal (for example, grasping) and in terms of how the goal is achieved (for example, precision grip). However, for most neurons, the congruence is broader and is confined to the goal of the action. These broadly congruent neurons are of particular interest, because they seem to gener ...
Computing with Spiking Neuron Networks
... Consider some different ways to decode the temporal information that can be transmitted by the n spiking neurons. If the code is to count the overall number of spikes fired by the set of neurons (population rate coding), the maximum amount of available information is log2 (n + 1), since only n + 1 d ...
... Consider some different ways to decode the temporal information that can be transmitted by the n spiking neurons. If the code is to count the overall number of spikes fired by the set of neurons (population rate coding), the maximum amount of available information is log2 (n + 1), since only n + 1 d ...
Descending Systems Translate Transient Cortical Commands into a
... identify the parameters coded in different motor sites, the relationships between the temporal profile of neuronal responses and the dynamics of motor behavior remain poorly understood in particular because motor parameters such as force and movement direction often change over time. We studied time ...
... identify the parameters coded in different motor sites, the relationships between the temporal profile of neuronal responses and the dynamics of motor behavior remain poorly understood in particular because motor parameters such as force and movement direction often change over time. We studied time ...
The neural mechanisms of perceptual filling-in
... In FIG. 1c, the region between two vertical lines appears darker than the regions outside the lines. Actually, the luminance in the middle of the central region is the same as that at the right and left margins of the figure. This is known as the Craik–O’Brien–Cornsweet illusion22,23. A rapid change ...
... In FIG. 1c, the region between two vertical lines appears darker than the regions outside the lines. Actually, the luminance in the middle of the central region is the same as that at the right and left margins of the figure. This is known as the Craik–O’Brien–Cornsweet illusion22,23. A rapid change ...
(2007) The most superficial sublamina of rat superior colluculus
... detail, essentially nothing is known about how cells in SGS1 process retinal input. As far as we aware, SGS1 and SGS2 have never been segregated on the ground of neuronal visual responses. Units throughout the SGS have been reported to be imprecisely tuned to specific stimulus parameters, responding ...
... detail, essentially nothing is known about how cells in SGS1 process retinal input. As far as we aware, SGS1 and SGS2 have never been segregated on the ground of neuronal visual responses. Units throughout the SGS have been reported to be imprecisely tuned to specific stimulus parameters, responding ...
Different levels of Ih determine distinct temporal integration in
... whereas I h exhibits similar voltage-dependent and kinetic properties in both classes of neurons. Bursting and regular-spiking neurons display similar morphology. The difference in I h between the two classes of neurons is not responsible for the distinct firing patterns, as neither pharmacological ...
... whereas I h exhibits similar voltage-dependent and kinetic properties in both classes of neurons. Bursting and regular-spiking neurons display similar morphology. The difference in I h between the two classes of neurons is not responsible for the distinct firing patterns, as neither pharmacological ...
Learning Innate Face Preferences
... addition to the primary visual cortex. The same model allows preferences for low-level features such as orientation or spatial frequency, and high-level features such as faces. to be compared, in order to account for the different categories of preferences found in experiments with newborns. Very fe ...
... addition to the primary visual cortex. The same model allows preferences for low-level features such as orientation or spatial frequency, and high-level features such as faces. to be compared, in order to account for the different categories of preferences found in experiments with newborns. Very fe ...
5. Third year activities - LIRA-Lab
... inter-alia, at building an artificial system that learns to communicate by means of body gestures. We adopted a three-pronged approach based on the results of neurophysiological and developmental psychology experiments, on the construction of models from the recording of human movements, and on the ...
... inter-alia, at building an artificial system that learns to communicate by means of body gestures. We adopted a three-pronged approach based on the results of neurophysiological and developmental psychology experiments, on the construction of models from the recording of human movements, and on the ...
Neuronal representation of visual motion and orientation in the fly
... the results section “Neuronal activity is tuned to grating orientation, but not motion direction”). The TFT display (F510EK005, Reikotronic, Cologne, Germany, 10.4 LED backlit LCD, nominal maximal white luminance: 1000 cdm−2 ) with a frame rate of 60 Hz was used to present various motion or flicke ...
... the results section “Neuronal activity is tuned to grating orientation, but not motion direction”). The TFT display (F510EK005, Reikotronic, Cologne, Germany, 10.4 LED backlit LCD, nominal maximal white luminance: 1000 cdm−2 ) with a frame rate of 60 Hz was used to present various motion or flicke ...
Review Inhibitory neurotransmission, plasticity and aging in the
... glycinergic inhibitory neurotransmission. As seen in development, age-related changes may be activity dependent. Age-related presynaptic changes in the cochlear nucleus include reduced glycine levels, while in the auditory midbrain and cortex, GABA synthesis and release are altered. Presumably, in r ...
... glycinergic inhibitory neurotransmission. As seen in development, age-related changes may be activity dependent. Age-related presynaptic changes in the cochlear nucleus include reduced glycine levels, while in the auditory midbrain and cortex, GABA synthesis and release are altered. Presumably, in r ...
Mechanisms of Maximum Information Preservation in the Drosophila
... amplifies weak ORN inputs greatly, but does not amplify strong ones as much. As PNs use their dynamic range more efficiently than ORNs, this transformation is thought to assist the decoder in discriminating between different odors. However, it is also expected that the neural variability of PN respo ...
... amplifies weak ORN inputs greatly, but does not amplify strong ones as much. As PNs use their dynamic range more efficiently than ORNs, this transformation is thought to assist the decoder in discriminating between different odors. However, it is also expected that the neural variability of PN respo ...
Clarke`s column neurons as the focus of a corticospinal corollary circuit
... involved in internal motor predictions15,16, although the local circuitry underlying convergence in these regions is obscure. ...
... involved in internal motor predictions15,16, although the local circuitry underlying convergence in these regions is obscure. ...
Organization of Cortical and Thalamic Input to Pyramidal Neurons in
... kHz) and synaptic events were detected using a threshold (within 23 ms of the stimulus with a threshold of ⬎6⫻ SD from baseline). Mean EPSC for sCRACM was computed over a 75 ms poststimulus time window (given in pA). Total input was computed by summing the suprathreshold pixels. Additional related a ...
... kHz) and synaptic events were detected using a threshold (within 23 ms of the stimulus with a threshold of ⬎6⫻ SD from baseline). Mean EPSC for sCRACM was computed over a 75 ms poststimulus time window (given in pA). Total input was computed by summing the suprathreshold pixels. Additional related a ...
3D Visual Response Properties of MSTd Emerge from an Efficient
... could be learned with NMF (Paatero and Tapper, 1994; Lee and Seung, 1999, 2001). NMF belongs to a class of methods that can be used to decompose multivariate data into an inner product of two reduced-rank matrices, where one matrix contains non-negative basis vectors and the other contains non-negat ...
... could be learned with NMF (Paatero and Tapper, 1994; Lee and Seung, 1999, 2001). NMF belongs to a class of methods that can be used to decompose multivariate data into an inner product of two reduced-rank matrices, where one matrix contains non-negative basis vectors and the other contains non-negat ...
neuronal coding of prediction errors
... outcomes (reward, punishment, behavioral reactions, external stimuli, internal states). Outcomes whose magnitude or frequency is different than predicted modify behavior in a direction that reduces the discrepancy between the outcome and its prediction. Changes in predictions and behavior continue u ...
... outcomes (reward, punishment, behavioral reactions, external stimuli, internal states). Outcomes whose magnitude or frequency is different than predicted modify behavior in a direction that reduces the discrepancy between the outcome and its prediction. Changes in predictions and behavior continue u ...
Figure 1 - Journal of Neuroscience
... to a light-sensitive area, likely the SC (Schnupp and King, 1997). The borders of the SC were roughly located by recording multiunit entrainment to a pulsed (1 or 4 Hz), red LED located in front of the monkey, or ⬃20 or ⬃40° to the side (contralateral to the IC under study). Although clear light res ...
... to a light-sensitive area, likely the SC (Schnupp and King, 1997). The borders of the SC were roughly located by recording multiunit entrainment to a pulsed (1 or 4 Hz), red LED located in front of the monkey, or ⬃20 or ⬃40° to the side (contralateral to the IC under study). Although clear light res ...
Novel Models of Visual Topographic Map Alignment in the Superior
... The SC receives visual inputs from retinal ganglion cells (RGCs) and Layer 5 pyramidal neurons in the primary visual cortex (V1) [9]. Each of these inputs projects to distinct, but overlapping, sublaminae of the superficial SC, where they are organized topographically and in alignment with one anoth ...
... The SC receives visual inputs from retinal ganglion cells (RGCs) and Layer 5 pyramidal neurons in the primary visual cortex (V1) [9]. Each of these inputs projects to distinct, but overlapping, sublaminae of the superficial SC, where they are organized topographically and in alignment with one anoth ...
Preferred visually evoked spatial and temporal frequencies in
... 5.2.1 Units recorded in experiment 1 ........................................................................................... 50 5.2.2 Units recorded in experiment 2 ........................................................................................... 52 5.2.3 Units recorded in experiment 3 ...
... 5.2.1 Units recorded in experiment 1 ........................................................................................... 50 5.2.2 Units recorded in experiment 2 ........................................................................................... 52 5.2.3 Units recorded in experiment 3 ...
Multisensory Integration in the Ventral Intraparietal Area of the
... were prepared for chronic recording of eye position and single-neuron activity in VIP. A single surgery was induced with Zoletil 20 (6 mg/kg) and atropine (0.25 mg) and maintained under isoflurane anesthesia (2.5%). A search coil was implanted subconjunctivally to measure eye position (Judge et al., ...
... were prepared for chronic recording of eye position and single-neuron activity in VIP. A single surgery was induced with Zoletil 20 (6 mg/kg) and atropine (0.25 mg) and maintained under isoflurane anesthesia (2.5%). A search coil was implanted subconjunctivally to measure eye position (Judge et al., ...
Efficient coding hypothesis
The efficient coding hypothesis was proposed by Horace Barlow in 1961 as a theoretical model of sensory coding in the brain. Within the brain, neurons often communicate with one another by sending electrical impulses referred to as action potentials or spikes. One goal of sensory neuroscience is to decipher the meaning of these spikes in order to understand how the brain represents and processes information about the outside world. Barlow hypothesized that the spikes in the sensory system formed a neural code for efficiently representing sensory information. By efficient Barlow meant that the code minimized the number of spikes needed to transmit a given signal. This is somewhat analogous to transmitting information across the internet, where different file formats can be used to transmit a given image. Different file formats require different number of bits for representing the same image at given distortion level, and some are better suited for representing certain classes of images than others. According to this model, the brain is thought to use a code which is suited for representing visual and audio information representative of an organism's natural environment.