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 ...
`What` Is Happening in the Dorsal Visual Pathway
... The study of the nature of object representations in the dorsal pathway and their behavioral significance is still subject to significant caveats that compel caution in the interpretation of behavioral and neural data. First, in most studies of nonhuman primates, sensitivity of a neural population to ...
... The study of the nature of object representations in the dorsal pathway and their behavioral significance is still subject to significant caveats that compel caution in the interpretation of behavioral and neural data. First, in most studies of nonhuman primates, sensitivity of a neural population to ...
Saccade-Related Spread of Activity Across
... if the receptive fields of those neurons are close together in visual space. This postulate leads to a visually symmetric kernel. In fact, symmetry in the visual space, but not on the brain map, has been demonstrated in V1 (Angelucci et al. 2002). As shown below, the visually symmetric kernel, once ...
... if the receptive fields of those neurons are close together in visual space. This postulate leads to a visually symmetric kernel. In fact, symmetry in the visual space, but not on the brain map, has been demonstrated in V1 (Angelucci et al. 2002). As shown below, the visually symmetric kernel, once ...
Saccade-Related Spread of Activity Across Superior Colliculus May
... if the receptive fields of those neurons are close together in visual space. This postulate leads to a visually symmetric kernel. In fact, symmetry in the visual space, but not on the brain map, has been demonstrated in V1 (Angelucci et al. 2002). As shown below, the visually symmetric kernel, once ...
... if the receptive fields of those neurons are close together in visual space. This postulate leads to a visually symmetric kernel. In fact, symmetry in the visual space, but not on the brain map, has been demonstrated in V1 (Angelucci et al. 2002). As shown below, the visually symmetric kernel, once ...
Prefrontal Neurons Coding Suppression of Specific Saccades
... saccade. Some neurons in the FEF are activated specifically for stimuli under no-go conditions (Sommer and Wurtz, 2001). Both of these mechanisms can be considered aspects of global suppression: the monkey is instructed not to make any saccade at all. However, in the real world most choices are not ...
... saccade. Some neurons in the FEF are activated specifically for stimuli under no-go conditions (Sommer and Wurtz, 2001). Both of these mechanisms can be considered aspects of global suppression: the monkey is instructed not to make any saccade at all. However, in the real world most choices are not ...
In Vivo Evaluation of White Matter Integrity and Anterograde
... Magnetic resonance imaging (MRI) allows noninvasive, longitudinal, and multiparametric assessments of the visual system without depth limitation.20–25 Although there were existing MR reports assessing the effects of NMDA-induced excitotoxicity in developing and adult brain tissues,26,27 most of the ...
... Magnetic resonance imaging (MRI) allows noninvasive, longitudinal, and multiparametric assessments of the visual system without depth limitation.20–25 Although there were existing MR reports assessing the effects of NMDA-induced excitotoxicity in developing and adult brain tissues,26,27 most of the ...
Organization of the Macaque Extrastriate Visual Cortex Re
... example, areas MT and MST both emphasize motion information and are topographically adjacent to each other. This adjacency is an obvious example of the continuity of function across the cortical surface. It adheres to the general principle that similar functions are arranged near each other. Given a ...
... example, areas MT and MST both emphasize motion information and are topographically adjacent to each other. This adjacency is an obvious example of the continuity of function across the cortical surface. It adheres to the general principle that similar functions are arranged near each other. Given a ...
Organization of the Macaque Extrastriate Visual Cortex Re
... example, areas MT and MST both emphasize motion information and are topographically adjacent to each other. This adjacency is an obvious example of the continuity of function across the cortical surface. It adheres to the general principle that similar functions are arranged near each other. Given a ...
... example, areas MT and MST both emphasize motion information and are topographically adjacent to each other. This adjacency is an obvious example of the continuity of function across the cortical surface. It adheres to the general principle that similar functions are arranged near each other. Given a ...
Imaging development and plasticity in the mouse visual system
... In the first part of this thesis (Chapter 2), I examined the role of retinal activity in the formation of topographic maps in a target region of retinal ganglion cells. It is generally assumed that in order to obtain such highly precise and ordered maps during development, spontaneous patterns of ne ...
... In the first part of this thesis (Chapter 2), I examined the role of retinal activity in the formation of topographic maps in a target region of retinal ganglion cells. It is generally assumed that in order to obtain such highly precise and ordered maps during development, spontaneous patterns of ne ...
Jennifer Ichida
... (LGN) cells really sensitive to orientation or direction? Visual Neuroscience, 19: 97-108. ...
... (LGN) cells really sensitive to orientation or direction? Visual Neuroscience, 19: 97-108. ...
Experimental Brain Research 221(1)
... midposterior intraparietal cortex and angular gyrus, compared to saccade and grasp. Second, we review the evidence for hemispheric lateralization (both for hand and visual hemifield) in these reach representations. Third, we review evidence for computational reach specificity in these regions and fi ...
... midposterior intraparietal cortex and angular gyrus, compared to saccade and grasp. Second, we review the evidence for hemispheric lateralization (both for hand and visual hemifield) in these reach representations. Third, we review evidence for computational reach specificity in these regions and fi ...
Selective attention through selective neuronal synchronization
... stream during task performance. In typical paradigms of selective attention, the sensory input is kept identical across trials with variations only in covert attention to different aspects of that input. In such tasks, neuronal responses are modulated with rapid temporal dynamics and high spatial se ...
... stream during task performance. In typical paradigms of selective attention, the sensory input is kept identical across trials with variations only in covert attention to different aspects of that input. In such tasks, neuronal responses are modulated with rapid temporal dynamics and high spatial se ...
Pattern adaptation and cross-orientation interactions in the primary
... stimulus. We investigated this possibility by studying the effects of adaptation to visual patterns containing one or both of two orientations—the preferred orientation for a cell, and the orientation orthogonal to it. Because neurons in the primary visual cortex are sharply tuned for orientation, s ...
... stimulus. We investigated this possibility by studying the effects of adaptation to visual patterns containing one or both of two orientations—the preferred orientation for a cell, and the orientation orthogonal to it. Because neurons in the primary visual cortex are sharply tuned for orientation, s ...
Decoding a Temporal Population Code
... This encoding was achieved by projecting the contour of visual stimuli onto a cortical layer of neurons that interact through excitatory lateral couplings. The temporal evolution of the summed activity of this cortical layer, the temporal population code, encodes the stimulus-specific features in th ...
... This encoding was achieved by projecting the contour of visual stimuli onto a cortical layer of neurons that interact through excitatory lateral couplings. The temporal evolution of the summed activity of this cortical layer, the temporal population code, encodes the stimulus-specific features in th ...
Predictive Coding as a Model of Biased Competition in Visual
... preceding stages of cortical processing, PC proposes that higher levels of cortex actively predict the input they expect to receive. Furthermore, it is proposed that cortical feedback connections convey predictions while cortical feedforward connections convey residual errors between these top-down ...
... preceding stages of cortical processing, PC proposes that higher levels of cortex actively predict the input they expect to receive. Furthermore, it is proposed that cortical feedback connections convey predictions while cortical feedforward connections convey residual errors between these top-down ...
Complete Pattern of Ocular Dominance Columns in Human Primary
... from six subjects of European descent with a history of monocular visual loss. They were patients of one of the authors (J.C.H.). Each patient, or surviving next-of-kin, provided written permission for postmortem histological examination, following a protocol approved by an Institutional Review Boar ...
... from six subjects of European descent with a history of monocular visual loss. They were patients of one of the authors (J.C.H.). Each patient, or surviving next-of-kin, provided written permission for postmortem histological examination, following a protocol approved by an Institutional Review Boar ...
PDF
... completing the training paradigm, we tested the cats using three experiments. Experiment 1 was a 100-trial session including 50 ICMS-absent trials and 10 trials each of 20, 40, 60, 80, and 100 µA pulse amplitude. This experiment was designed to test the cats’ performance in ICMS detection at differe ...
... completing the training paradigm, we tested the cats using three experiments. Experiment 1 was a 100-trial session including 50 ICMS-absent trials and 10 trials each of 20, 40, 60, 80, and 100 µA pulse amplitude. This experiment was designed to test the cats’ performance in ICMS detection at differe ...
Figure and Ground in the Visual Cortex: V2 Combines Stereoscopic
... just a random asymmetry of receptive fields. If it indeed reflects the process of figure-ground segregation as hypothesized (Zhou et al., 2000), then these neurons should also respond to stereoscopically defined 3D edges and be selective for depth order. For example, a neuron with a preference for f ...
... just a random asymmetry of receptive fields. If it indeed reflects the process of figure-ground segregation as hypothesized (Zhou et al., 2000), then these neurons should also respond to stereoscopically defined 3D edges and be selective for depth order. For example, a neuron with a preference for f ...
PDF
... receives convergent input from visual, somatosensory, and motor areas (1, 2). Neurons in VIP respond to visual and somatosensory stimuli, with a relative emphasis on stimuli that are near, approaching, or touching the head (3–5). Many neurons are also sensitive to vestibular signals during head rota ...
... receives convergent input from visual, somatosensory, and motor areas (1, 2). Neurons in VIP respond to visual and somatosensory stimuli, with a relative emphasis on stimuli that are near, approaching, or touching the head (3–5). Many neurons are also sensitive to vestibular signals during head rota ...
Spontaneous and Stimulus-Evoked Intrinsic Optical Signals in
... For acoustically evoked images, corresponding data frames (i.e., same stimulus and time after stimulation) from multiple blocks of stored data were first summed. Each successive summed frame collected after stimulus onset was then divided by the frame collected prior to stimulus onset within the tri ...
... For acoustically evoked images, corresponding data frames (i.e., same stimulus and time after stimulation) from multiple blocks of stored data were first summed. Each successive summed frame collected after stimulus onset was then divided by the frame collected prior to stimulus onset within the tri ...
Spontaneous and Stimulus-Evoked Intrinsic Optical Signals in
... For acoustically evoked images, corresponding data frames (i.e., same stimulus and time after stimulation) from multiple blocks of stored data were first summed. Each successive summed frame collected after stimulus onset was then divided by the frame collected prior to stimulus onset within the tri ...
... For acoustically evoked images, corresponding data frames (i.e., same stimulus and time after stimulation) from multiple blocks of stored data were first summed. Each successive summed frame collected after stimulus onset was then divided by the frame collected prior to stimulus onset within the tri ...
Neuron
... In the posterior parietal cortex, significant BOLD activations were clustered along the banks of the intraparietal sulcus, mainly in BA 7 (Figure 2A). There were multiple pairs of bilateral peaks from the fundus to the lateral bank of the intraparietal sulcus (Figure 2B). We call a pair of bilateral ...
... In the posterior parietal cortex, significant BOLD activations were clustered along the banks of the intraparietal sulcus, mainly in BA 7 (Figure 2A). There were multiple pairs of bilateral peaks from the fundus to the lateral bank of the intraparietal sulcus (Figure 2B). We call a pair of bilateral ...
see clearly method
... There is abundant evidence for the general proposal that exercises, repetition, practice and learning lead to better performance, to the acquisition of skill. Many ocular conditions exemplify this law. The achievements obtained by the clumsy practices which have been developed should stimulate ophth ...
... There is abundant evidence for the general proposal that exercises, repetition, practice and learning lead to better performance, to the acquisition of skill. Many ocular conditions exemplify this law. The achievements obtained by the clumsy practices which have been developed should stimulate ophth ...
Hubel 1977_Small
... different destinations: to other nearby cortical regions such as area 18, to the optic tectum, and, in a recurrent path, to the lateral geniculate bodies. The striate cortex should thus not be regarded in any sense as the end of the visual path - in fact it is probably very close to the beginning, a ...
... different destinations: to other nearby cortical regions such as area 18, to the optic tectum, and, in a recurrent path, to the lateral geniculate bodies. The striate cortex should thus not be regarded in any sense as the end of the visual path - in fact it is probably very close to the beginning, a ...
Prediction of Subjective Affective State From Brain Activations
... statistics. An example of the latter might be that independently of the mean level of activation of a set of voxels, if some voxels varied together for one event, but not for another, that could potentially encode information about which event was present. This evidence from trial by trial correlati ...
... statistics. An example of the latter might be that independently of the mean level of activation of a set of voxels, if some voxels varied together for one event, but not for another, that could potentially encode information about which event was present. This evidence from trial by trial correlati ...