Visual Fields
... spot and seen by the patient as a fixation loss.11 Two other important measures of reliability are false positives and false negatives. False positives represent the patient responding to stimuli levels that the field analyzer would not predict the patient would see. This creates the appearance of a ...
... spot and seen by the patient as a fixation loss.11 Two other important measures of reliability are false positives and false negatives. False positives represent the patient responding to stimuli levels that the field analyzer would not predict the patient would see. This creates the appearance of a ...
Slide 1
... FIGURE 42.3 Dorsal cortex of reptiles. A. A dorsolateral view of a turtle brain. The large olfactory bulb provides input to lateral cortex (homologue to piriform cortex of mammals). A slight rhinal dimple is apparent rostrally at the border of dorsal cortex (homologous to neocortex of mammals). Med ...
... FIGURE 42.3 Dorsal cortex of reptiles. A. A dorsolateral view of a turtle brain. The large olfactory bulb provides input to lateral cortex (homologue to piriform cortex of mammals). A slight rhinal dimple is apparent rostrally at the border of dorsal cortex (homologous to neocortex of mammals). Med ...
Neuronal Interaction Dynamics in Cat Primary Visual Cortex
... Figure 1. A, Schematic illustration of the elementary stimuli (squares of light, 0.4 3 0.4°) presented at seven horizontally shifted positions within the foveal representation of the visual field. B, Composite stimuli were assembled from combinations of the elementary stimuli and were presented at s ...
... Figure 1. A, Schematic illustration of the elementary stimuli (squares of light, 0.4 3 0.4°) presented at seven horizontally shifted positions within the foveal representation of the visual field. B, Composite stimuli were assembled from combinations of the elementary stimuli and were presented at s ...
Visual and oculomotor selection: links, causes and
... Causal mechanisms of spatial selective attention If you are instructed to continue reading this text while preparing to detect the occurrence of some visual event in one corner of the page (e.g. a change in page number), your ability to detect the event would be heightened in comparison to a situati ...
... Causal mechanisms of spatial selective attention If you are instructed to continue reading this text while preparing to detect the occurrence of some visual event in one corner of the page (e.g. a change in page number), your ability to detect the event would be heightened in comparison to a situati ...
Representation of naturalistic image structure in the primate visual
... However, in the area immediately downstream, V2, cells respond more vigorously to these stimuli than to matched control stimuli. Humans show BOLD fMRI responses in V1 and V2 that are consistent with the neuronal measurements in macaque. These fMRI measurements, as well as neurophysiological work by ...
... However, in the area immediately downstream, V2, cells respond more vigorously to these stimuli than to matched control stimuli. Humans show BOLD fMRI responses in V1 and V2 that are consistent with the neuronal measurements in macaque. These fMRI measurements, as well as neurophysiological work by ...
KliperEtAl CIP2010
... feasibility of this class of models to explain aspects of higherlevel visual processing such as object recognition. The role of a single cell in such models is, in particular, a subject of great debate and while researchers have acknowledged the need to account for properties of invariance and speci ...
... feasibility of this class of models to explain aspects of higherlevel visual processing such as object recognition. The role of a single cell in such models is, in particular, a subject of great debate and while researchers have acknowledged the need to account for properties of invariance and speci ...
2) Classical Conditioning
... 4. The NS is transformed into a Conditioned Stimulus (CS); that is, when the CS is presented by itself, it elicits or causes the CR (which is the same involuntary response as the UR; the name changes because it is elicited by a different stimulus. This is written CS elicits > CR. In classical condit ...
... 4. The NS is transformed into a Conditioned Stimulus (CS); that is, when the CS is presented by itself, it elicits or causes the CR (which is the same involuntary response as the UR; the name changes because it is elicited by a different stimulus. This is written CS elicits > CR. In classical condit ...
Dispatch Vision: How to Train Visual Cortex to Predict Reward Time
... dispenser: your money. But which part of your brain is actually involved in generating this expectation? In a series of recent papers [1–3], one published in this issue of Current Biology [4], Shuler and colleagues present a surprising answer: it is, at least in part, your primary visual cortex. Pri ...
... dispenser: your money. But which part of your brain is actually involved in generating this expectation? In a series of recent papers [1–3], one published in this issue of Current Biology [4], Shuler and colleagues present a surprising answer: it is, at least in part, your primary visual cortex. Pri ...
`What` and `where` in the human brain
... pathway, for example, whereas many VI cells function as local spatiotemporal filters, V2 cells may respond to ‘virtual’ or illusory contours of figures [I31, some V4 cells respond only if a stimulus stands out from its background on the basis of a difference in color or form 114,151, and inferior te ...
... pathway, for example, whereas many VI cells function as local spatiotemporal filters, V2 cells may respond to ‘virtual’ or illusory contours of figures [I31, some V4 cells respond only if a stimulus stands out from its background on the basis of a difference in color or form 114,151, and inferior te ...
Multi-Sensory Neurons
... once a fully formed sensory perception, are the individual sense perceptions integrated together to produce a multi-sensory experience. In this “old” view information is processed initially on a sense-by-sense basis, with each sense processed in a specific part of the cortex – sound in the auditory ...
... once a fully formed sensory perception, are the individual sense perceptions integrated together to produce a multi-sensory experience. In this “old” view information is processed initially on a sense-by-sense basis, with each sense processed in a specific part of the cortex – sound in the auditory ...
Interactions between Motivation, Emotion and Attention: From
... The size of the cortical code for a stimulus increases with repeated presentation to allow a larger set of cells in cortex to be tuned to the specific properties of the stimulus. This effect is enhanced if the presentation is combined with an emotional reaction. Weinberger (1995) has shown that the ...
... The size of the cortical code for a stimulus increases with repeated presentation to allow a larger set of cells in cortex to be tuned to the specific properties of the stimulus. This effect is enhanced if the presentation is combined with an emotional reaction. Weinberger (1995) has shown that the ...
Interactions between Motivation, Emotion and Attention: From
... The size of the cortical code for a stimulus increases with repeated presentation to allow a larger set of cells in cortex to be tuned to the specific properties of the stimulus. This effect is enhanced if the presentation is combined with an emotional reaction. Weinberger (1995) has shown that the ...
... The size of the cortical code for a stimulus increases with repeated presentation to allow a larger set of cells in cortex to be tuned to the specific properties of the stimulus. This effect is enhanced if the presentation is combined with an emotional reaction. Weinberger (1995) has shown that the ...
2320Lecture20
... – changes accompanied by full-field transients are hard to detect • e.g. change blindness • orienting mechanism is blinded by the transient ...
... – changes accompanied by full-field transients are hard to detect • e.g. change blindness • orienting mechanism is blinded by the transient ...
BETA ACTIVITY: A CARRIER FOR VISUAL ATTENTION
... recorded from occipital electrodes of subjects perceiving patterned visual stimuli (Giannitrapani 1971, Fig. 4B, V. Stein et al. 1993). Such confusing results can be explained by the assumption that visual processing organizes cortical activity into specific spatial pattern replacing the global sync ...
... recorded from occipital electrodes of subjects perceiving patterned visual stimuli (Giannitrapani 1971, Fig. 4B, V. Stein et al. 1993). Such confusing results can be explained by the assumption that visual processing organizes cortical activity into specific spatial pattern replacing the global sync ...
Gestalt Issues in Modern Neuroscience
... 3.1. Receptive and perceptive fields A compelling and well-known phenomenon that may be explained in terms of concentric receptive fields is the Hermann grid illusion (Figure 3). Baumgartner (1960) first proposed that the dark illusory spots at the intersections of a white grid could be accounted fo ...
... 3.1. Receptive and perceptive fields A compelling and well-known phenomenon that may be explained in terms of concentric receptive fields is the Hermann grid illusion (Figure 3). Baumgartner (1960) first proposed that the dark illusory spots at the intersections of a white grid could be accounted fo ...
Neural correlates of attention in primate visual cortex
... Fig. 1. Time course of responses to two stimuli inside the receptive field. (a) The curves indicate the normalized instantaneous firing rate averaged across 64 cells from the middle-temporal area (MT) and the medial superior temporal area (MST). The x-axis plots the time (in ms) from the onset of th ...
... Fig. 1. Time course of responses to two stimuli inside the receptive field. (a) The curves indicate the normalized instantaneous firing rate averaged across 64 cells from the middle-temporal area (MT) and the medial superior temporal area (MST). The x-axis plots the time (in ms) from the onset of th ...
Visual Properties of Neurons in a Polysensory Area in Superior
... retinal image (the principal monocular cue a circular path about the monkey’s head. Only the con: for movement in depth). The responsesof tralateral eye was stimulated. The scale under each trace these units to movement in depth were not indicates the stimulus location in degrees of visual angle. du ...
... retinal image (the principal monocular cue a circular path about the monkey’s head. Only the con: for movement in depth). The responsesof tralateral eye was stimulated. The scale under each trace these units to movement in depth were not indicates the stimulus location in degrees of visual angle. du ...
laboratory one
... In all animals, mechanical information (touch, pressure, pain) is converted into neural signals by a vast array of mechanosensory neurons whose dendritic endings respond to mechanical forces via stretch sensitive ion channels. Many of these channels provide a passage for positive ions, depolarizing ...
... In all animals, mechanical information (touch, pressure, pain) is converted into neural signals by a vast array of mechanosensory neurons whose dendritic endings respond to mechanical forces via stretch sensitive ion channels. Many of these channels provide a passage for positive ions, depolarizing ...
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[pdf]
... ‘attention’. A variety of attention-related modulatory effects on neural processing across the visual system have been demonstrated, such as increases in baseline activity [1], increases in response gain of neurons that selectively respond to an attended feature or location [2,3], as well as shifts ...
... ‘attention’. A variety of attention-related modulatory effects on neural processing across the visual system have been demonstrated, such as increases in baseline activity [1], increases in response gain of neurons that selectively respond to an attended feature or location [2,3], as well as shifts ...
Feedforward, horizontal, and feedback processing
... is left identical (see [33]). The initial transients are identical in all three cases, but from 80–100 ms after stimulus onset, responses are larger (shaded in gray) for positions of the RF on the figure boundary or surface than on the background. (c) Responses in V1 with the RF at 15 different posi ...
... is left identical (see [33]). The initial transients are identical in all three cases, but from 80–100 ms after stimulus onset, responses are larger (shaded in gray) for positions of the RF on the figure boundary or surface than on the background. (c) Responses in V1 with the RF at 15 different posi ...
Ch 4 Power Point
... – The Gestalt emphasis is still felt in the study of perception, as they had useful insights that have stood the test of time, raised important issues ...
... – The Gestalt emphasis is still felt in the study of perception, as they had useful insights that have stood the test of time, raised important issues ...
Magnetoencephalographic Investigation of Human Cortical Area V1
... (e.g., Cavanagh and Anstis, 1991). Some studies suggest that there may be more than one chromatic motion system (Derrington and Henning, 1993; Gorea et al., 1993a,b; Cropper and Derrington, 1994; Gegenfurtner and Hawken, 1995), although there is no general agreement on their number or degree of inde ...
... (e.g., Cavanagh and Anstis, 1991). Some studies suggest that there may be more than one chromatic motion system (Derrington and Henning, 1993; Gorea et al., 1993a,b; Cropper and Derrington, 1994; Gegenfurtner and Hawken, 1995), although there is no general agreement on their number or degree of inde ...
Comparative Neuroanatomy of Mammals, Birds, Turtles and Lizards
... Comparative Neuroanatomy of Mammals, Birds, Turtles and Lizards and Crocodiles Compiled by G.A. Bradshaw, The Kerulos Center, in consultation with comparative neuroscientist Dr. Erich Jarvis, Duke University (unpublished data, cite only with permission). ...
... Comparative Neuroanatomy of Mammals, Birds, Turtles and Lizards and Crocodiles Compiled by G.A. Bradshaw, The Kerulos Center, in consultation with comparative neuroscientist Dr. Erich Jarvis, Duke University (unpublished data, cite only with permission). ...