Been There, Seen That: A Neural Mechanism for Performing
... Submitted 3 August 2009; accepted in final form 2 October 2009 ...
... Submitted 3 August 2009; accepted in final form 2 October 2009 ...
Superior Colliculus and Visual Spatial Attention
... and execution of orienting movements. This diversity belies the view of the SC as simply a node in a descending motor pathway; instead, it contains multiple classes of neurons that provide points of interconnection between many circuits serving a range of sensory, motor, and cognitive functions. ...
... and execution of orienting movements. This diversity belies the view of the SC as simply a node in a descending motor pathway; instead, it contains multiple classes of neurons that provide points of interconnection between many circuits serving a range of sensory, motor, and cognitive functions. ...
The Motor System of the Cortex and the Brain Stem
... point, as opposed to when they place it to the right of that point. The “activated” regions appear as enclosed areas on an “inflated” map of the cortex. PPC neurons code for movement kinematics and not dynamics Slide 7. What does the term “planning a movement” really mean when we say that the poster ...
... point, as opposed to when they place it to the right of that point. The “activated” regions appear as enclosed areas on an “inflated” map of the cortex. PPC neurons code for movement kinematics and not dynamics Slide 7. What does the term “planning a movement” really mean when we say that the poster ...
The Physiology of the Senses Lecture 5
... Visual perception is a two-stage process. Stage 1) An early involuntary stage that automatically performs rapid low level processing of the visual world. Stage 2) A voluntary and attention-demanding capacity-limited bottle neck that regulates what enters working memory, awareness and consciousness. ...
... Visual perception is a two-stage process. Stage 1) An early involuntary stage that automatically performs rapid low level processing of the visual world. Stage 2) A voluntary and attention-demanding capacity-limited bottle neck that regulates what enters working memory, awareness and consciousness. ...
Feedforward, horizontal, and feedback processing
... are probably as fast as feedforward connections [26], allowing for a fast exchange of information between areas. Moreover, many areas in the parietal cortex as well as the frontal cortex show response latencies that are almost as short as in V1, suggesting that these areas do not depend on V1 for vi ...
... are probably as fast as feedforward connections [26], allowing for a fast exchange of information between areas. Moreover, many areas in the parietal cortex as well as the frontal cortex show response latencies that are almost as short as in V1, suggesting that these areas do not depend on V1 for vi ...
The Problem of Consciousness by Francis Crick and
... evidence from studies of brain-damaged patients that the ability to lay down new long-term episodic memories is not essential for consciousness to be experienced. It is difficult to imagine that anyone could be conscious if he or she had no memory whatsoever, even an extremely short one, of what had ...
... evidence from studies of brain-damaged patients that the ability to lay down new long-term episodic memories is not essential for consciousness to be experienced. It is difficult to imagine that anyone could be conscious if he or she had no memory whatsoever, even an extremely short one, of what had ...
Visual field defect
... Papillitis >> inflammation of the anterior optic nerve causes disc swelling, and sometimes hemorrhages, cells in the vitreous, and deep retinal exudates. After the neuritis resolves, the disc is often pale (optic pallor), most commonly in the temporal aspect. Atrophy is seen over time, especially af ...
... Papillitis >> inflammation of the anterior optic nerve causes disc swelling, and sometimes hemorrhages, cells in the vitreous, and deep retinal exudates. After the neuritis resolves, the disc is often pale (optic pallor), most commonly in the temporal aspect. Atrophy is seen over time, especially af ...
Gaze direction controls response gain in primary visual
... found to be modulated in only 11% of cases, with no correlation with the modulation on visual response. Variations in the neural response are not due to effects such as fatigue or adaptation because controls of activity stability were performed for 90% of cells by repeating the ®rst block of recordi ...
... found to be modulated in only 11% of cases, with no correlation with the modulation on visual response. Variations in the neural response are not due to effects such as fatigue or adaptation because controls of activity stability were performed for 90% of cells by repeating the ®rst block of recordi ...
Lateral Geniculate nucleus
... The highway of visual information (retina-LGN-V1) can be vulnerable to strokes and tumors. Because of the orderly organization of this central visual pathway, such lesions produce characteristic gaps in the visual field. ...
... The highway of visual information (retina-LGN-V1) can be vulnerable to strokes and tumors. Because of the orderly organization of this central visual pathway, such lesions produce characteristic gaps in the visual field. ...
Information Optimization in Coupled Audio–Visual Cortical Maps Mehran Kardar A. Zee
... animals, and the instructive role played by the visual experience. (A recent review, with specific references can be found in Ref. [4].) The current study was motivated by experiments in which owls are fitted with prismatic spectacles that shift the visual fields by a preset degree in the horizontal ...
... animals, and the instructive role played by the visual experience. (A recent review, with specific references can be found in Ref. [4].) The current study was motivated by experiments in which owls are fitted with prismatic spectacles that shift the visual fields by a preset degree in the horizontal ...
3680Lecture27
... • When a visual stimulus appears: – Visual neurons tuned to aspects of that stimulus fire action potentials (single unit recording) – Ensemble depolarizations of pyramidal cells in various parts of visual cortex (and elsewhere) (ERP, MEG) – Increased metabolic demand ensues in various parts of the v ...
... • When a visual stimulus appears: – Visual neurons tuned to aspects of that stimulus fire action potentials (single unit recording) – Ensemble depolarizations of pyramidal cells in various parts of visual cortex (and elsewhere) (ERP, MEG) – Increased metabolic demand ensues in various parts of the v ...
neural basis of deciding, choosing and acting
... on. Outputs from the primary visual cortex innervate secondary and tertiary areas that project to other visual areas in the parietal and temporal lobes. The connections between visual areas form a complex network that is organized into two main streams. One stream passes into inferior temporal (IT) ...
... on. Outputs from the primary visual cortex innervate secondary and tertiary areas that project to other visual areas in the parietal and temporal lobes. The connections between visual areas form a complex network that is organized into two main streams. One stream passes into inferior temporal (IT) ...
Attention maps in the brain - Site BU
... and turns back on when it reaches a target of interest, requiring that the attentional spotlight switch between targets multiple times per second. The speed limit of the attentional switching is a major point of debate in this literature. When subjects intentionally move their attentional spotlight, ...
... and turns back on when it reaches a target of interest, requiring that the attentional spotlight switch between targets multiple times per second. The speed limit of the attentional switching is a major point of debate in this literature. When subjects intentionally move their attentional spotlight, ...
Attention as a decision in information space
... of behavioral tasks suitable for use in experimental animals. In these tasks animals are trained to make simple decisions based on sensory evidence or rewards and express these decisions through specific actions [1,2]. This strategy has been particularly fruitful in the oculomotor system, where monk ...
... of behavioral tasks suitable for use in experimental animals. In these tasks animals are trained to make simple decisions based on sensory evidence or rewards and express these decisions through specific actions [1,2]. This strategy has been particularly fruitful in the oculomotor system, where monk ...
Driving Curiosity in Search with Large
... in the top results of major commercial search engines as those which users may expect to see during the usual search experience. Usefulness can be estimated using standard information retrieval relevance judgments. The extent of serendipity in a set of search results can then be measured as the amou ...
... in the top results of major commercial search engines as those which users may expect to see during the usual search experience. Usefulness can be estimated using standard information retrieval relevance judgments. The extent of serendipity in a set of search results can then be measured as the amou ...
On the importance of the transient visual response in the superior
... arrives plus the magnitude of this response itself will ultimately determine the behavioral response elicited, because the magnitude of the response is correlated with the latency of saccade initiation [8,9]. It is believed that a saccade is initiated when activity among saccade-related neurons in t ...
... arrives plus the magnitude of this response itself will ultimately determine the behavioral response elicited, because the magnitude of the response is correlated with the latency of saccade initiation [8,9]. It is believed that a saccade is initiated when activity among saccade-related neurons in t ...
2320lecture22
... • Since attention has a profound effect on perception, one would expect it to have some measurable effect on the brain • This has been confirmed with a variety of techniques: EEG, fMRI/PET, Unit Recordings ...
... • Since attention has a profound effect on perception, one would expect it to have some measurable effect on the brain • This has been confirmed with a variety of techniques: EEG, fMRI/PET, Unit Recordings ...
`What` and `where` in the human brain
... difference in color or form 114,151, and inferior temporal cells respond selectively to global or overall object features, such as shape 116181, with a small proportion being specialized for faces (117,19-211; for reviews, see [22,23]). Similarly, as one proceeds from Vl to MT, to MST, and thence to ...
... difference in color or form 114,151, and inferior temporal cells respond selectively to global or overall object features, such as shape 116181, with a small proportion being specialized for faces (117,19-211; for reviews, see [22,23]). Similarly, as one proceeds from Vl to MT, to MST, and thence to ...
Lecture 2
... Figure H shows the macaque monkey visual areas morphed onto human cortex based on the placement of sulcal landmarks (Van Essen et al., 2001) Can we assume humans are just morphed monkeys? In some areas the human cortical surface area is slightly larger than in the macaque (e.g., visual cortex: 2X); ...
... Figure H shows the macaque monkey visual areas morphed onto human cortex based on the placement of sulcal landmarks (Van Essen et al., 2001) Can we assume humans are just morphed monkeys? In some areas the human cortical surface area is slightly larger than in the macaque (e.g., visual cortex: 2X); ...
Modeling Visual Cognition
... The visual system has a limited number of processing resources, which must be allocated optimally when we encode visual stimuli. In Kyllingsbæk, Valla, Vanrie, and Bundesen (2007), we manipulated the spatial separation between several stimulus letters in whole report while keeping the eccentricity o ...
... The visual system has a limited number of processing resources, which must be allocated optimally when we encode visual stimuli. In Kyllingsbæk, Valla, Vanrie, and Bundesen (2007), we manipulated the spatial separation between several stimulus letters in whole report while keeping the eccentricity o ...
attention - CMU Graphics
... -- For spatial location, these requirements are fulfilled by the retinotopic organization and the well-defined spatial receptive fields in early areas of the ...
... -- For spatial location, these requirements are fulfilled by the retinotopic organization and the well-defined spatial receptive fields in early areas of the ...
“visual pathway and its lesions” dr.tasneem
... The retina contains millions of specialized photoreceptor cells called rods and cones that convert light rays into electrical signals that transmitted to the brain through the optic nerve. Rods and cones provide the ability to see in dim light and to see in color, respectively The macula, located in ...
... The retina contains millions of specialized photoreceptor cells called rods and cones that convert light rays into electrical signals that transmitted to the brain through the optic nerve. Rods and cones provide the ability to see in dim light and to see in color, respectively The macula, located in ...
T2 - Center for Neural Basis of Cognition
... The spatial representation of an attended location is remapped when the eyes move. Remapping is initiated by a corollary discharge of the eye movement command. Remapping produces a representation that is oculocentric: a location is represented in the coordinates of the movement needed to acquire the ...
... The spatial representation of an attended location is remapped when the eyes move. Remapping is initiated by a corollary discharge of the eye movement command. Remapping produces a representation that is oculocentric: a location is represented in the coordinates of the movement needed to acquire the ...