Précis of The Brain and Emotion
... appear to have been reconnected (compared to rodents) to place much more emphasis on cortical processing, taking place in areas such as the orbitofrontal cortex (see Chapter 2). The principle of the stage of sensory processing at which reward value is extracted and made explicit in the representatio ...
... appear to have been reconnected (compared to rodents) to place much more emphasis on cortical processing, taking place in areas such as the orbitofrontal cortex (see Chapter 2). The principle of the stage of sensory processing at which reward value is extracted and made explicit in the representatio ...
On-line, voluntary control of human temporal lobe
... Daily life continually confronts us with an exuberance of external, sensory stimuli competing with a rich stream of internal deliberations, plans and ruminations. The brain must select one or more of these for further processing. How this competition is resolved across multiple sensory and cognitive ...
... Daily life continually confronts us with an exuberance of external, sensory stimuli competing with a rich stream of internal deliberations, plans and ruminations. The brain must select one or more of these for further processing. How this competition is resolved across multiple sensory and cognitive ...
Multisensory anatomical pathways - Centre de Recherche Cerveau
... results are similar to those observed in the cat (Hall and Lomber, 2008), in which the direct connections between the two primary sensory areas (from A1 to A17) represent only a small percentage (about 5%) of the auditory inputs to the primary visual area. In the monkey we did not find that the audit ...
... results are similar to those observed in the cat (Hall and Lomber, 2008), in which the direct connections between the two primary sensory areas (from A1 to A17) represent only a small percentage (about 5%) of the auditory inputs to the primary visual area. In the monkey we did not find that the audit ...
A perceptual representation in the frontal eye field during covert
... correct lever-turn behavior. To test this we calculated the average percentage of errors committed as a function of the target position across all of the recording sessions. Both monkeys performed above chance levels at all target positions. In addition, both monkeys committed errors at all position ...
... correct lever-turn behavior. To test this we calculated the average percentage of errors committed as a function of the target position across all of the recording sessions. Both monkeys performed above chance levels at all target positions. In addition, both monkeys committed errors at all position ...
The time course of selective visual attention: theory and experiments
... distractor group. In a triple conjunction search the target may differ from all distractor groups in one or more features. So far, models based on the above mentioned two-stage processes have been able to distinguish feature from conjunction search based on the observed slopes of the linear relation ...
... distractor group. In a triple conjunction search the target may differ from all distractor groups in one or more features. So far, models based on the above mentioned two-stage processes have been able to distinguish feature from conjunction search based on the observed slopes of the linear relation ...
Word - Jim Davies
... s-image (not shown). Maps are created between the corresponding objects. In this example it would mean a map between ray1 in the left bottom s-image and the four rays in the second bottom s-image. This system does not solve the mapping problem, but a mapping from the correspondences of the first s-i ...
... s-image (not shown). Maps are created between the corresponding objects. In this example it would mean a map between ray1 in the left bottom s-image and the four rays in the second bottom s-image. This system does not solve the mapping problem, but a mapping from the correspondences of the first s-i ...
Categorical perception of somesthetic stimuli: psychophysical
... stimulus speeds (categorical neurons). In a light instruction task, we tested the possibility that the categorical neurons (n = 71) were associated with the intention to press, or with the trajectory of the hand to one of the two target switches used to indicate categorization. In this situation, ea ...
... stimulus speeds (categorical neurons). In a light instruction task, we tested the possibility that the categorical neurons (n = 71) were associated with the intention to press, or with the trajectory of the hand to one of the two target switches used to indicate categorization. In this situation, ea ...
Action Preparation Shapes Processing in Early Visual Cortex
... analysis to find areas in the posterior brain that discriminate between grasping and pointing ( preparation). Subsequently, a region-of-interest (ROI) analysis was performed to further examine the effects of action preparation on the early visual areas and aIPS, for orientation-selective patches. Th ...
... analysis to find areas in the posterior brain that discriminate between grasping and pointing ( preparation). Subsequently, a region-of-interest (ROI) analysis was performed to further examine the effects of action preparation on the early visual areas and aIPS, for orientation-selective patches. Th ...
The Number of Cortical Neurons Used to See
... There has been much study of individual neurons by microelectrode recordings in animals, and gross activation of brain areas by brain scans in man, and psychophysical investigation of limits to human perception (Marcelia 1980). However, it has been very difficult to make specific links between human ...
... There has been much study of individual neurons by microelectrode recordings in animals, and gross activation of brain areas by brain scans in man, and psychophysical investigation of limits to human perception (Marcelia 1980). However, it has been very difficult to make specific links between human ...
Erin Hardie
... acquired hydrocephalus which begins later on in life and is often less severe. Our patient exhibited chronic compensated hydrocephalus and since she had no previous documentation of this disorder, it is nearly impossible to determine if it was congenital or acquired; more than likely it was present ...
... acquired hydrocephalus which begins later on in life and is often less severe. Our patient exhibited chronic compensated hydrocephalus and since she had no previous documentation of this disorder, it is nearly impossible to determine if it was congenital or acquired; more than likely it was present ...
A model for experience-dependent changes in the responses of inferotemporal neurons
... decay of the membrane potential towards rest with a time constant of 1/η = 10 timesteps. The third term represents total excitatory synaptic input. The excitatory input to unit i from unit j is the product of three factors: the difference between the post-synaptic membrane potential and the sodium r ...
... decay of the membrane potential towards rest with a time constant of 1/η = 10 timesteps. The third term represents total excitatory synaptic input. The excitatory input to unit i from unit j is the product of three factors: the difference between the post-synaptic membrane potential and the sodium r ...
interactions between number and space in parietal cortex
... representation that is shared by the programming of a hand, eye or attention movement). However, so far, no study has sufficiently shown whether these reference frames are eye- or world-centred. Another related question concerns the stage of processing at which spatial–numerical interactions arise; ...
... representation that is shared by the programming of a hand, eye or attention movement). However, so far, no study has sufficiently shown whether these reference frames are eye- or world-centred. Another related question concerns the stage of processing at which spatial–numerical interactions arise; ...
Horizontal Interactions in Cat Striate Cortex: 1. Anatomical Substrate
... the authors present anatomical and physiological data on the postnatal development of projections within cat striate cortex and discuss their relation to other columnar systems and their functions in specific neocortical operations. Correspondence to: W . Singer, as above Received I 1 April 1989, re ...
... the authors present anatomical and physiological data on the postnatal development of projections within cat striate cortex and discuss their relation to other columnar systems and their functions in specific neocortical operations. Correspondence to: W . Singer, as above Received I 1 April 1989, re ...
Multisensory Integration in the Ventral Intraparietal Area of the
... could lead the tactile stimulus or vice versa, thus defining seven different asynchrony conditions. In the “spatial congruence” paradigm, visual and tactile stimuli were presented simultaneously but at different locations relative to one another: one of the two stimuli was inside the receptive field ...
... could lead the tactile stimulus or vice versa, thus defining seven different asynchrony conditions. In the “spatial congruence” paradigm, visual and tactile stimuli were presented simultaneously but at different locations relative to one another: one of the two stimuli was inside the receptive field ...
Full Article - CIHR Research Group in Sensory
... Fig. 3. Analysis of neural activity in the predictive cued-saccade task. (A) Invalid advantage at the 250-ms CTOA correlated with reduced target-aligned response in the dSC. Data are plotted as the cumulative probability of the differences between the mean response elicited in the Valid condition su ...
... Fig. 3. Analysis of neural activity in the predictive cued-saccade task. (A) Invalid advantage at the 250-ms CTOA correlated with reduced target-aligned response in the dSC. Data are plotted as the cumulative probability of the differences between the mean response elicited in the Valid condition su ...
How different are the visual representations used for object
... middle ‘fly’ is the only one with eyes that are the correct size in proportion to its body. In addition to stimuli derived from a set of naturalistic animal images, experiments were undertaken with stimuli from naturalistic images of defined-base, rigid artefacts (see [12] page 163, for examples). R ...
... middle ‘fly’ is the only one with eyes that are the correct size in proportion to its body. In addition to stimuli derived from a set of naturalistic animal images, experiments were undertaken with stimuli from naturalistic images of defined-base, rigid artefacts (see [12] page 163, for examples). R ...
How Do We See the World?
... it, your fingers form the appropriate shape long before they get to the object. When you reach for a pen, your thumb and index finger assume a position as if to pinch the pen. When you reach for a mug, your hand is oriented vertically so that your fingers can grasp the handle. These movements are il ...
... it, your fingers form the appropriate shape long before they get to the object. When you reach for a pen, your thumb and index finger assume a position as if to pinch the pen. When you reach for a mug, your hand is oriented vertically so that your fingers can grasp the handle. These movements are il ...
fMRI - Rackcdn.com
... performs a task for a specified time, resting for a similar time between repetitions (i.e., alternating “task” and “control” blocks). This repetition is required for statistical processing to detect the small signal changes that characterize the BOLD response, on the order of 1 to 5% at 1.5 tesla (T ...
... performs a task for a specified time, resting for a similar time between repetitions (i.e., alternating “task” and “control” blocks). This repetition is required for statistical processing to detect the small signal changes that characterize the BOLD response, on the order of 1 to 5% at 1.5 tesla (T ...
Visual detection deficits following inactivation of the superior colliculus in the cat
... Superior colliculus inhibition and visual deficits The animal sat at the center of a pair of orthogonal magnetic fields and gaze position was continuously monitored (Fuchs & Robinson, 1966). During the training period, cats initially learned to tolerate the minimal restraint while being fed in the ...
... Superior colliculus inhibition and visual deficits The animal sat at the center of a pair of orthogonal magnetic fields and gaze position was continuously monitored (Fuchs & Robinson, 1966). During the training period, cats initially learned to tolerate the minimal restraint while being fed in the ...
Cross modality matching of brightness and loudness
... relationships between sensory modalities. Auditory and visual sensory integration can be examined through cross modality matching of brightness and loudness. Brightness and loudness are natural correlates of one another as they both represent the parameter of intensity for their respective sensory m ...
... relationships between sensory modalities. Auditory and visual sensory integration can be examined through cross modality matching of brightness and loudness. Brightness and loudness are natural correlates of one another as they both represent the parameter of intensity for their respective sensory m ...
Hemispheric Differences in the Activation of
... picture processing, and visual imagery. For example, Marsolek and colleagues showed hemispheric differences when the perceptual form of objects was altered on repeated presentation using a visual half-field technique in combination with a repetition priming procedure (Marsolek, 1995, 1999). In one s ...
... picture processing, and visual imagery. For example, Marsolek and colleagues showed hemispheric differences when the perceptual form of objects was altered on repeated presentation using a visual half-field technique in combination with a repetition priming procedure (Marsolek, 1995, 1999). In one s ...
the functional properties of the light
... lobule is a higher order processing area of the visual system, for it is known to receive convergent inputs from both the geniculostriate and the collicular portions of the visual system. The striate and the prestriate areas are believed to project upon the inferior parietal lobule over a multiple-s ...
... lobule is a higher order processing area of the visual system, for it is known to receive convergent inputs from both the geniculostriate and the collicular portions of the visual system. The striate and the prestriate areas are believed to project upon the inferior parietal lobule over a multiple-s ...
Form representation in monkey inferotemporal cortex is virtually
... useful objects, objects are seldom seen in isolation, and gaze shifts occur several times per second to bring new objects onto the fovea9–11. This study focuses on the effect of these unconstrained changes in gaze (‘free viewing’). Free viewing potentially complicates recognition because each gaze s ...
... useful objects, objects are seldom seen in isolation, and gaze shifts occur several times per second to bring new objects onto the fovea9–11. This study focuses on the effect of these unconstrained changes in gaze (‘free viewing’). Free viewing potentially complicates recognition because each gaze s ...
PDF - Journal of Neuroscience
... 680 white dots (0.19° at 2.61 cd/m 2) on a black background (0.18 cd/m 2). Each dot had a randomly assigned screen duration of 33–1000 ms that maintained uniform dot density across the stimuli. Radial patterns were created by accelerating the dots across screen using a sine ⫻ cosine function of each ...
... 680 white dots (0.19° at 2.61 cd/m 2) on a black background (0.18 cd/m 2). Each dot had a randomly assigned screen duration of 33–1000 ms that maintained uniform dot density across the stimuli. Radial patterns were created by accelerating the dots across screen using a sine ⫻ cosine function of each ...
Imagery and Perception Share Cortical
... for cortical flattening (Wandell et al. 2000). We defined the borders between ventral and dorsal areas V1, V2, and V3 by visual inspection of flattened polar angle maps. Eccentricity maps were used to check whether anterior limits of the regions as defined by polar angle maps corresponded with eccentric ...
... for cortical flattening (Wandell et al. 2000). We defined the borders between ventral and dorsal areas V1, V2, and V3 by visual inspection of flattened polar angle maps. Eccentricity maps were used to check whether anterior limits of the regions as defined by polar angle maps corresponded with eccentric ...