High-Level Visual Processing: Cognitive Influences
... The first clear insight into the neural pathways mediating object recognition was obtained in the late 19th century when the American neurologist Sanger Brown and the British physiologist Edward Albert Schäfer found that experimental lesions of the temporal lobe in primates resulted in loss of the a ...
... The first clear insight into the neural pathways mediating object recognition was obtained in the late 19th century when the American neurologist Sanger Brown and the British physiologist Edward Albert Schäfer found that experimental lesions of the temporal lobe in primates resulted in loss of the a ...
Summary
... specimens of D. veneta resulted in a reversible degeneration of ovaries, and she suggested that the return of oogenesis occurs in parallel to the progress of the reconstruction of the neurosecretory system of the regenerating brains. In our preliminary study we showed that the amputation of the firs ...
... specimens of D. veneta resulted in a reversible degeneration of ovaries, and she suggested that the return of oogenesis occurs in parallel to the progress of the reconstruction of the neurosecretory system of the regenerating brains. In our preliminary study we showed that the amputation of the firs ...
ATTENTIONAL MODULATION OF VISUAL PROCESSING John H
... response, under identical sensory conditions, when spatial attention was directed to the stimulus. Attention had no measurable effect on the response that was elicited at 5% contrast, which was well below the neuron’s contrast-response threshold. The 10% contrast stimulus, which was just below the n ...
... response, under identical sensory conditions, when spatial attention was directed to the stimulus. Attention had no measurable effect on the response that was elicited at 5% contrast, which was well below the neuron’s contrast-response threshold. The 10% contrast stimulus, which was just below the n ...
Integrated model of visual processing
... representation. The primal sketch corresponds to a local and 2D analysis of luminance borders. The next level is the 2 1 / 2 D sketch that encodes the position and orientation in depth of small surface elements in 3D and the final stage is the 3D representation that corresponds to the representation ...
... representation. The primal sketch corresponds to a local and 2D analysis of luminance borders. The next level is the 2 1 / 2 D sketch that encodes the position and orientation in depth of small surface elements in 3D and the final stage is the 3D representation that corresponds to the representation ...
What can mice tell us about how vision works?
... Understanding how the brain gives rise to the experience of sight is an important and fundamental question that has garnered much attention over the years [1]. The longstanding emphasis stems from the fact that many mammals, including humans, rely on vision as their primary sense to evaluate their s ...
... Understanding how the brain gives rise to the experience of sight is an important and fundamental question that has garnered much attention over the years [1]. The longstanding emphasis stems from the fact that many mammals, including humans, rely on vision as their primary sense to evaluate their s ...
do simultaneously presented visual and auditory
... attention. In two conditions, participants were presented with auditory and visual stimuli that conveyed the same information (consistent), but they were instructed to attend to either the auditory or the visual stimulus. In the other two conditions, the auditory and visual stimuli conveyed differen ...
... attention. In two conditions, participants were presented with auditory and visual stimuli that conveyed the same information (consistent), but they were instructed to attend to either the auditory or the visual stimulus. In the other two conditions, the auditory and visual stimuli conveyed differen ...
Basal ganglia discharge abnormalities in Parkinson`s disease
... parkinsonian tremor may directly result from synchronized oscillatory bursting in the basal ganglia, studies of the correlation or coherence between tremor and basal ganglia oscillations have not been conclusive, perhaps resulting from the fact that different limbs of parkinsonian patients may engag ...
... parkinsonian tremor may directly result from synchronized oscillatory bursting in the basal ganglia, studies of the correlation or coherence between tremor and basal ganglia oscillations have not been conclusive, perhaps resulting from the fact that different limbs of parkinsonian patients may engag ...
A Stereoscopic Look at Visual Cortex
... (Barlow et al. 1967; Nikara et al. 1968). It was hypothesized that these neurons carry the signals used by the brain to support stereoscopic vision. These results were subsequently confirmed in monkeys (Poggio 1995) and other animals (Pettigrew 1980). Although many neurons in V1 respond selectively ...
... (Barlow et al. 1967; Nikara et al. 1968). It was hypothesized that these neurons carry the signals used by the brain to support stereoscopic vision. These results were subsequently confirmed in monkeys (Poggio 1995) and other animals (Pettigrew 1980). Although many neurons in V1 respond selectively ...
The Receptive Fields of Inferior Temporal Cortex Neurons in Natural
... mechanisms of selective attention, there are usually only two small visual stimuli present in the visual field, which is otherwise blank (Chelazzi et al., 1993, 1998; Desimone and Duncan, 1995; Chelazzi, 1998; Chelazzi and Corbetta, 2000). In conditions in which one visual stimulus is present, infer ...
... mechanisms of selective attention, there are usually only two small visual stimuli present in the visual field, which is otherwise blank (Chelazzi et al., 1993, 1998; Desimone and Duncan, 1995; Chelazzi, 1998; Chelazzi and Corbetta, 2000). In conditions in which one visual stimulus is present, infer ...
Frontal Lobes and Memory - University of California, Berkeley
... significant impairment in yes–no recognition memory, based on the tendency of frontal patients to false-alarm to semantically related distractors. On a forced-choice recognition procedure, however, frontal patients made no errors; but on this task, the distractor items were semantically unrelated an ...
... significant impairment in yes–no recognition memory, based on the tendency of frontal patients to false-alarm to semantically related distractors. On a forced-choice recognition procedure, however, frontal patients made no errors; but on this task, the distractor items were semantically unrelated an ...
Recounting the impact of Hubel and Wiesel
... the organization of neuronal circuits. His widely read ideas on cell assemblies and phase sequences, though based on hypothetical neurons, stimulated thinking about how neurons could be organized to produce complex behaviour. In Hebb’s case this was largely directed at learning and memory, but it st ...
... the organization of neuronal circuits. His widely read ideas on cell assemblies and phase sequences, though based on hypothetical neurons, stimulated thinking about how neurons could be organized to produce complex behaviour. In Hebb’s case this was largely directed at learning and memory, but it st ...
Cortical region interactions and the functional role of apical
... dashed lines. All other cell types have been omitted, as has the intra-regional connectivity. The cortical sheet is shown divided into two regions at different levels in an information processing hierarchy. Axon projections connecting these two regions are illustrated. ...
... dashed lines. All other cell types have been omitted, as has the intra-regional connectivity. The cortical sheet is shown divided into two regions at different levels in an information processing hierarchy. Axon projections connecting these two regions are illustrated. ...
Visual and presaccadic activity in area 8Ar of the macaque monkey
... increasing size with eccentricity. These trends are demonstrated in the frontal eye fields (FEF), ...
... increasing size with eccentricity. These trends are demonstrated in the frontal eye fields (FEF), ...
Attitudes and Evaluation 1 Attitudes and Evaluation
... stimuli in complex environments and prepare an organism for behavior. Because different stimuli may be deemed “important” at different times, a general arousal or vigilance system that is itself independent of valence might function most efficiently. This system presumably is involved in monitoring ...
... stimuli in complex environments and prepare an organism for behavior. Because different stimuli may be deemed “important” at different times, a general arousal or vigilance system that is itself independent of valence might function most efficiently. This system presumably is involved in monitoring ...
Within-hemifield perceptual averaging of facial expressions
... those that respond to faces, have large receptive fields often encompassing substantial regions of the contralateral visual field (e.g., Boussaoud et al., 1991; Chelazzi et al., 1998; Desimone & Gross, 1979; Niemeier et al., 2005; Op De Beeck & Vogels, 2000). Thus, when a pair of faces is presented ...
... those that respond to faces, have large receptive fields often encompassing substantial regions of the contralateral visual field (e.g., Boussaoud et al., 1991; Chelazzi et al., 1998; Desimone & Gross, 1979; Niemeier et al., 2005; Op De Beeck & Vogels, 2000). Thus, when a pair of faces is presented ...
Erin Hardie
... round and reactive to light without an afferent papillary defect in both eyes. Cover test showed a small angle residual right esotropia with a slight hypotropia with a combined latent nystagmus. Intraocular pressures were 15mm in the right and 14mm Hg in the left at 9:00am by Tonopen applanation. Pa ...
... round and reactive to light without an afferent papillary defect in both eyes. Cover test showed a small angle residual right esotropia with a slight hypotropia with a combined latent nystagmus. Intraocular pressures were 15mm in the right and 14mm Hg in the left at 9:00am by Tonopen applanation. Pa ...
PDF preprint - The Computational Neurobiology Laboratory
... where δ(·) is the Dirac delta function, eφ is a unit vector in the φ–direction, β is a parameter that measures the weight of lateral relative to local connections, and wLAT (s) is the weight of lateral connections between iso–orientation patches separated by a cortical distance s along a visuotopic ...
... where δ(·) is the Dirac delta function, eφ is a unit vector in the φ–direction, β is a parameter that measures the weight of lateral relative to local connections, and wLAT (s) is the weight of lateral connections between iso–orientation patches separated by a cortical distance s along a visuotopic ...
Parkinson`s Disease Backgrounder
... every day in Canada. The average age of onset is 60. Young Onset Parkinson’s disease refers to those people who are diagnosed in their 20’s, 30’s, and 40’s. How is Parkinson’s diagnosed? It is important that individuals receive an accurate and timely diagnosis. This can be done by referral to a neur ...
... every day in Canada. The average age of onset is 60. Young Onset Parkinson’s disease refers to those people who are diagnosed in their 20’s, 30’s, and 40’s. How is Parkinson’s diagnosed? It is important that individuals receive an accurate and timely diagnosis. This can be done by referral to a neur ...
A Neural Theory of Visual Attention
... decision-bias parameters. Pertinence values determine which objects are selected, but perceptual decision-bias parameters determine how the objects are categorized. If particular types of categorizations are desired, decision-bias parameters of the relevant categories should be high. By Equation 1, ...
... decision-bias parameters. Pertinence values determine which objects are selected, but perceptual decision-bias parameters determine how the objects are categorized. If particular types of categorizations are desired, decision-bias parameters of the relevant categories should be high. By Equation 1, ...
Learning Strengthens the Response of Primary Visual Cortex to
... may have shifted toward the trained stimulus. The observed changes in V1 could be produced locally or could result from feedback from higher cortical areas. Studies of V1 with single-unit recording report different neural effects of learning than those observed here [14–16]. None of the studies repo ...
... may have shifted toward the trained stimulus. The observed changes in V1 could be produced locally or could result from feedback from higher cortical areas. Studies of V1 with single-unit recording report different neural effects of learning than those observed here [14–16]. None of the studies repo ...
Human Neural Systems for Face Recognition and Social
... infants to imitate facial expressions at a very early age further suggests that face perception plays a central role in developing social interaction skills and language. Functional brain imaging allows the noninvasive study of the neural systems that participate in face perception in the intact hum ...
... infants to imitate facial expressions at a very early age further suggests that face perception plays a central role in developing social interaction skills and language. Functional brain imaging allows the noninvasive study of the neural systems that participate in face perception in the intact hum ...
Heightened Interference on Implicit, but Not Explicit, Tests of
... not significantly different from that of the temporal lobectomy patients. Materials. Two lists of 12 paired–associate words were prepared with the same stimulus words but different response words. The lists were the same as those used in previous studies involving normal old people (e.g., Winocur & ...
... not significantly different from that of the temporal lobectomy patients. Materials. Two lists of 12 paired–associate words were prepared with the same stimulus words but different response words. The lists were the same as those used in previous studies involving normal old people (e.g., Winocur & ...
A perceptual representation in the frontal eye field during covert
... locations in the search array (Fig. 1A). For a trial to count as valid, the monkey was required to grasp the lever and maintain it at a center position, fixate the central spot (400–800 ms), wait for the search array to appear and, while maintaining fixation on the central spot, turn the lever to repo ...
... locations in the search array (Fig. 1A). For a trial to count as valid, the monkey was required to grasp the lever and maintain it at a center position, fixate the central spot (400–800 ms), wait for the search array to appear and, while maintaining fixation on the central spot, turn the lever to repo ...
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 ...
Intention, Action Planning, and Decision Making in Parietal
... motor commands (Penfield and Boldrey 1937; Evarts and Thach, 1969), and more anterior regions of the frontal lobe are involved in many higher-level aspects of movement planning and decision making (Miller and Cohen, 2001; Wise, 1985). The anterior aspect of the parietal lobe is well established in t ...
... motor commands (Penfield and Boldrey 1937; Evarts and Thach, 1969), and more anterior regions of the frontal lobe are involved in many higher-level aspects of movement planning and decision making (Miller and Cohen, 2001; Wise, 1985). The anterior aspect of the parietal lobe is well established in t ...