Neuropsychologia, 47, 1621-6
... projector itself. A custom-made start button, fastened to the table, was used to record the initiation of the pointing response and to trigger the closure of liquid-crystal display goggles (PLATO, Translucent Technologies) that were worn by the participants. The PLATO goggles were to control stimulu ...
... projector itself. A custom-made start button, fastened to the table, was used to record the initiation of the pointing response and to trigger the closure of liquid-crystal display goggles (PLATO, Translucent Technologies) that were worn by the participants. The PLATO goggles were to control stimulu ...
Selective amplification of the S
... relation to the RG and Ach responses. We find that this effect generalizes across different stimulus contrasts and spatial stimuli (1-d and 2-d patterns), but is selective for temporal frequency, as it is not found for stimuli at 8 Hz. While the mechanism of this cortical enhancement of BY color vis ...
... relation to the RG and Ach responses. We find that this effect generalizes across different stimulus contrasts and spatial stimuli (1-d and 2-d patterns), but is selective for temporal frequency, as it is not found for stimuli at 8 Hz. While the mechanism of this cortical enhancement of BY color vis ...
Color responses of the human lateral geniculate nucleus: selective
... relation to the RG and Ach responses. We find that this effect generalizes across different stimulus contrasts and spatial stimuli (1-d and 2-d patterns), but is selective for temporal frequency, as it is not found for stimuli at 8 Hz. While the mechanism of this cortical enhancement of BY color vis ...
... relation to the RG and Ach responses. We find that this effect generalizes across different stimulus contrasts and spatial stimuli (1-d and 2-d patterns), but is selective for temporal frequency, as it is not found for stimuli at 8 Hz. While the mechanism of this cortical enhancement of BY color vis ...
Lateral Connectivity and Contextual Interactions in Macaque
... contour integration in primary visual cortex (V1): intrinsic horizontal connections and feedback from higher cortical areas. To distinguish between these, we combined functional mapping with a new technique for labeling axons, a recombinant adenovirus bearing the gene for green fluorescent protein ( ...
... contour integration in primary visual cortex (V1): intrinsic horizontal connections and feedback from higher cortical areas. To distinguish between these, we combined functional mapping with a new technique for labeling axons, a recombinant adenovirus bearing the gene for green fluorescent protein ( ...
Neural processes underlying conscious perception
... responded selectively to one of the two shapes. In the strongest masking condition, there was still a significant difference in the neuronsÕ response between preferred and not-preferred targets, although the monkeys were at chance in discriminating both targets. In comparison with an unmasked conditio ...
... responded selectively to one of the two shapes. In the strongest masking condition, there was still a significant difference in the neuronsÕ response between preferred and not-preferred targets, although the monkeys were at chance in discriminating both targets. In comparison with an unmasked conditio ...
1 1 THE CEREBRAL CORTEX Parcellation of the cerebral cortex
... The classical motor area occupies the precentral gyrus, areas 4 and 6, with some spillover into the postcentral gyrus. Stimulation causes a discrete, upside-down somatotopic activation of contralateral muscles through the pyramidal system. The supplementary motor area occupies the medial hemispheric ...
... The classical motor area occupies the precentral gyrus, areas 4 and 6, with some spillover into the postcentral gyrus. Stimulation causes a discrete, upside-down somatotopic activation of contralateral muscles through the pyramidal system. The supplementary motor area occupies the medial hemispheric ...
cortex
... the laminae of the cortex and arcuate fibres. The more generalized meanings may come from (i) numerous progressive arcuate cascades which extend the associations like Huygens wave front; (ii) long association fibers; (iii) callosal connections. The primary sensory areas have few commissural connecti ...
... the laminae of the cortex and arcuate fibres. The more generalized meanings may come from (i) numerous progressive arcuate cascades which extend the associations like Huygens wave front; (ii) long association fibers; (iii) callosal connections. The primary sensory areas have few commissural connecti ...
cortico-cortical feedback controls spatial summation in
... Injections were guided with optical imaging of blood vessels (top left), orientation preference maps (top right) and retinotopic representations (bottom). B) Recordings were directed to regions of V1 expressing opsins. top) exposed V1 and V2 as seen through GPF-goggles, bottom) DiI marked electrode ...
... Injections were guided with optical imaging of blood vessels (top left), orientation preference maps (top right) and retinotopic representations (bottom). B) Recordings were directed to regions of V1 expressing opsins. top) exposed V1 and V2 as seen through GPF-goggles, bottom) DiI marked electrode ...
Hippocampus duality: memory and novelty detection are subserved
... ms (N2). Its amplitude (larger for the famous faces task) and polarity did not vary across the successive contacts located in the hippocampus. A later negative component peaking around 400 ms was evoked by OB targets, while famous faces elicited a component of reverse polarity. To maintain nomenclat ...
... ms (N2). Its amplitude (larger for the famous faces task) and polarity did not vary across the successive contacts located in the hippocampus. A later negative component peaking around 400 ms was evoked by OB targets, while famous faces elicited a component of reverse polarity. To maintain nomenclat ...
David H. Hubel - Nobel Lecture
... The going was rough. We had only the equipment for retinal stimulation and recording that had been designed a few years before by Talbot and Kuffler (3). A piece of apparatus resembling a small cyclotron held the anesthetized and paralyzed cat with its head facing almost directly upwards. A modified ...
... The going was rough. We had only the equipment for retinal stimulation and recording that had been designed a few years before by Talbot and Kuffler (3). A piece of apparatus resembling a small cyclotron held the anesthetized and paralyzed cat with its head facing almost directly upwards. A modified ...
Cortical Substrates of Perceptual Stability during Eye Movements
... internal reference signal, reflecting the eye movement, from the retinal motion signal. If the two cancel each other, visual structures, which do not move, will also be perceived as nonmoving. If, however, the reference signal is too small or too large, a false eyemovement-induced motion of the exte ...
... internal reference signal, reflecting the eye movement, from the retinal motion signal. If the two cancel each other, visual structures, which do not move, will also be perceived as nonmoving. If, however, the reference signal is too small or too large, a false eyemovement-induced motion of the exte ...
What can mice tell us about how vision works?
... subtypes of mouse RGCs. The main conclusion of these studies is that mouse RGCs are highly diverse, encompassing at least 22 anatomically distinct subtypes [30] (Figure 1). In addition to having three subtypes of alpha Y-like RGCs and four to five subtypes of melanopsin ipRGCs, the mouse retina harb ...
... subtypes of mouse RGCs. The main conclusion of these studies is that mouse RGCs are highly diverse, encompassing at least 22 anatomically distinct subtypes [30] (Figure 1). In addition to having three subtypes of alpha Y-like RGCs and four to five subtypes of melanopsin ipRGCs, the mouse retina harb ...
Neuronal Selectivities to Complex Object
... the pathway. Although a functional dissociation between posterior IT and anterior IT was suggested on the basis of lesion studies (Iwai and Mishkin 1968), this concept has not been further developed, probably because of the lack of related data at the cellular level. As a step towards this goal, we ...
... the pathway. Although a functional dissociation between posterior IT and anterior IT was suggested on the basis of lesion studies (Iwai and Mishkin 1968), this concept has not been further developed, probably because of the lack of related data at the cellular level. As a step towards this goal, we ...
DanielBearMCB105 Research Proposal
... operant conditioning is predicted to have a more powerful effect than classical conditioning, since the former may not rely on evolutionarily relevant stimuli. A positive result would suggest that an ambiguous image can drive its own preferred perception if one image is somehow deemed important, eve ...
... operant conditioning is predicted to have a more powerful effect than classical conditioning, since the former may not rely on evolutionarily relevant stimuli. A positive result would suggest that an ambiguous image can drive its own preferred perception if one image is somehow deemed important, eve ...
Integration of Visual and Auditory Information by Superior Temporal
... the superior colliculus that show multisensory integration have overlapping visual and auditory receptive fields and can show supra-additive responses when the audiovisual stimuli are presented in that same region of space (Meredith & Stein, 1986a, 1996). If either the auditory or visual stimulus is ...
... the superior colliculus that show multisensory integration have overlapping visual and auditory receptive fields and can show supra-additive responses when the audiovisual stimuli are presented in that same region of space (Meredith & Stein, 1986a, 1996). If either the auditory or visual stimulus is ...
weiten6_PPT04
... Fig 4.24 – Feature analysis in form perception. One vigorously debated theory of form perception is that the brain has cells that respond to specific aspects or features of stimuli, such as lines and angles. Neurons functioning as higher-level analyzers then respond to input from these “feature det ...
... Fig 4.24 – Feature analysis in form perception. One vigorously debated theory of form perception is that the brain has cells that respond to specific aspects or features of stimuli, such as lines and angles. Neurons functioning as higher-level analyzers then respond to input from these “feature det ...
Visual and presaccadic activity in area 8Ar of the macaque monkey
... neurons with receptive fields at similar spatial locations were clustered within the area; however, ...
... neurons with receptive fields at similar spatial locations were clustered within the area; however, ...
Within-hemifield perceptual averaging of facial expressions
... and with no mask. Eleven observers rated the faces using a 4-point scale from 1 (most negative) to 4 (most positive). The mean ratings were 3.65 (SD = 0.14) for the happy faces, 1.42 (SD = 0.29) for the angry faces, and 2.40 (SD = 0.17) for the surprise faces. Note that the mean valence rating for t ...
... and with no mask. Eleven observers rated the faces using a 4-point scale from 1 (most negative) to 4 (most positive). The mean ratings were 3.65 (SD = 0.14) for the happy faces, 1.42 (SD = 0.29) for the angry faces, and 2.40 (SD = 0.17) for the surprise faces. Note that the mean valence rating for t ...
Saccade Target Selection in Frontal Eye Field of Macaque. I. Visual
... by a fixed interval (300-500 msec) (Fig. 1C). This condition was used to assess the activation of neurons in response to stimuli presented when the monkey was instructed that no saccade should be made. The first and third conditions were repeated presenting the target with distracters (Fig. ID&). Th ...
... by a fixed interval (300-500 msec) (Fig. 1C). This condition was used to assess the activation of neurons in response to stimuli presented when the monkey was instructed that no saccade should be made. The first and third conditions were repeated presenting the target with distracters (Fig. ID&). Th ...
cortex
... the laminae of the cortex and arcuate fibres. The more generalized meanings may come from (i) numerous progressive arcuate cascades which extend the associations like Huygens wave front; (ii) long association fibers; (iii) callosal connections. The primary sensory areas have few commissural connecti ...
... the laminae of the cortex and arcuate fibres. The more generalized meanings may come from (i) numerous progressive arcuate cascades which extend the associations like Huygens wave front; (ii) long association fibers; (iii) callosal connections. The primary sensory areas have few commissural connecti ...
Is In-out asymmetry diagnostic of visual crowding? Ramakrishna
... increasing the need for attention to monitor more locations, increased the strength of IOA. Additionally, when participants had to attend a central location, IOA was eliminated or even reversed in some participants (Petrov & Meleshkevich, 2011b). On the other hand, there are potential issues with th ...
... increasing the need for attention to monitor more locations, increased the strength of IOA. Additionally, when participants had to attend a central location, IOA was eliminated or even reversed in some participants (Petrov & Meleshkevich, 2011b). On the other hand, there are potential issues with th ...
Cerebral Cortex
... 2. Visual Agnosias (word blindness)- angular gyrus 3. Auditory Agnosias (word deafness)- caudal part of superior temporal gyrus Expressive Aphasias: lesions of Broca’s area; disruption of speech production; poor syntax; word omissions; normal comprehension of language, but speech is labored. ...
... 2. Visual Agnosias (word blindness)- angular gyrus 3. Auditory Agnosias (word deafness)- caudal part of superior temporal gyrus Expressive Aphasias: lesions of Broca’s area; disruption of speech production; poor syntax; word omissions; normal comprehension of language, but speech is labored. ...
Neuronal activity in human primary visual cortex correlates with
... using visual-evoked potentials (VEP; for example, ref. 15) and magnetoencephalography (MEG)16,17. These studies reported strong fluctuations in the VEP and MEG signals using sensors placed over posterior (occipital) areas, but it was not possible to pinpoint the precise visual area(s) from which tho ...
... using visual-evoked potentials (VEP; for example, ref. 15) and magnetoencephalography (MEG)16,17. These studies reported strong fluctuations in the VEP and MEG signals using sensors placed over posterior (occipital) areas, but it was not possible to pinpoint the precise visual area(s) from which tho ...
Analyzing Neural Responses to Natural Signals: Maximally
... gaussian distributions of inputs. In this article, we investigate whether it is possible to lift the requirement for stimuli to be gaussian. When using natural stimuli, which certainly are nongaussian, the RS cannot be found by the spike-triggered covariance method. Similarly, the reverse correlatio ...
... gaussian distributions of inputs. In this article, we investigate whether it is possible to lift the requirement for stimuli to be gaussian. When using natural stimuli, which certainly are nongaussian, the RS cannot be found by the spike-triggered covariance method. Similarly, the reverse correlatio ...
Intermediate
... one hand, Crowley and Katz (1999) found that total removal of retinal influence early in visual development did not prevent segregation of geniculocortical axons into ocular dominance columns of normal periodicity. They thus propose that ocular dominance column formation relies on molecular cues pre ...
... one hand, Crowley and Katz (1999) found that total removal of retinal influence early in visual development did not prevent segregation of geniculocortical axons into ocular dominance columns of normal periodicity. They thus propose that ocular dominance column formation relies on molecular cues pre ...