PSYC550 Sense or Senseless
... – An opening in the bone surrounding the cochlea that reveals a membrane, against which the baseplate of the stapes presses, transmitting sound vibrations into the fluid within the cochlea. • organ of Corti – The sensory organ on the basilar membrane that contains the auditory hair cells. ...
... – An opening in the bone surrounding the cochlea that reveals a membrane, against which the baseplate of the stapes presses, transmitting sound vibrations into the fluid within the cochlea. • organ of Corti – The sensory organ on the basilar membrane that contains the auditory hair cells. ...
Acoustical Vision of Neglected Stimuli: Interaction among Spatially
... separate modality (vision). In neglect patients, a sound presented at the same position (or at close disparity) as a visual stimulus influenced detection of previously neglected visual targets. Before going on to understand the implications of this finding in a context of a cross-modal interaction ...
... separate modality (vision). In neglect patients, a sound presented at the same position (or at close disparity) as a visual stimulus influenced detection of previously neglected visual targets. Before going on to understand the implications of this finding in a context of a cross-modal interaction ...
Information Optimization in Coupled Audio–Visual Cortical Maps Mehran Kardar A. Zee
... Ref. [7]. The essence of this approach is the assumption that neural connections act as linear filters of the incoming signals, and also introduce noise in the outputs. If the (correlated) input signals, and the random noise, are taken from Gaussian probability distributions, the outputs are also Ga ...
... Ref. [7]. The essence of this approach is the assumption that neural connections act as linear filters of the incoming signals, and also introduce noise in the outputs. If the (correlated) input signals, and the random noise, are taken from Gaussian probability distributions, the outputs are also Ga ...
Article Page 08.27.20+
... It is tempting to view this progression of visual information down the various pathways as just that—a progression of information in discreet and sequential stages, each new stage building upon or adding to information from the previous stage. However, this is not how our system works. In general, o ...
... It is tempting to view this progression of visual information down the various pathways as just that—a progression of information in discreet and sequential stages, each new stage building upon or adding to information from the previous stage. However, this is not how our system works. In general, o ...
III
... and tract, from the retina to the pretectal region of the midbrain. The efferent pathway is in the oculomotor nerve: parasympathetic fibers from the accessory oculomotor nucleus (E-W nucleus), synapsing in the ciliary ganglion, and supplying the sphincter pupillae. Because of contralateral connectio ...
... and tract, from the retina to the pretectal region of the midbrain. The efferent pathway is in the oculomotor nerve: parasympathetic fibers from the accessory oculomotor nucleus (E-W nucleus), synapsing in the ciliary ganglion, and supplying the sphincter pupillae. Because of contralateral connectio ...
Attention maps in the brain - Site BU
... are limited by their temporal resolution and spatial attention is capable of moving as fast as every 200–500 milliseconds (e.g., Refs 57–59), fMRI methods are not ideal for ruling out rapid shifts of spatial attention. Thus, we employed a psychophysical task that excluded the possibility that spatia ...
... are limited by their temporal resolution and spatial attention is capable of moving as fast as every 200–500 milliseconds (e.g., Refs 57–59), fMRI methods are not ideal for ruling out rapid shifts of spatial attention. Thus, we employed a psychophysical task that excluded the possibility that spatia ...
Brain Areas and Topography
... Definition of an “Area” • Neuroimager’s definition of an area: Some blob vaguely in the vicinity (+/- ~3 cm) of where I think it ought to be that lights up for something I think it ought to light up for • Neuroanatomist’s definition of an area: A circumscribed region of the cerebral cortex in which ...
... Definition of an “Area” • Neuroimager’s definition of an area: Some blob vaguely in the vicinity (+/- ~3 cm) of where I think it ought to be that lights up for something I think it ought to light up for • Neuroanatomist’s definition of an area: A circumscribed region of the cerebral cortex in which ...
Eagleman Ch 8. Attention and Consciousness
... Attention and Awareness The attentional deficit covers multiple sensory modalities Pointing out the deficits to the patient does not help resolve the problem for more than a brief time. The unattended stimuli do activate the primary sensory cortices, but the activation does not spread. ...
... Attention and Awareness The attentional deficit covers multiple sensory modalities Pointing out the deficits to the patient does not help resolve the problem for more than a brief time. The unattended stimuli do activate the primary sensory cortices, but the activation does not spread. ...
P312Ch04B_Cortex
... It’s called a column because it is collection of columns of cells, containing all 6 layers of the cortex. It’s called a hypercolumn because it contains multiple individual columns, each one devoted to processing a the visual stimulus in a different way. Hypercolumns are analogous to states – each st ...
... It’s called a column because it is collection of columns of cells, containing all 6 layers of the cortex. It’s called a hypercolumn because it contains multiple individual columns, each one devoted to processing a the visual stimulus in a different way. Hypercolumns are analogous to states – each st ...
Processing of complex stimuli and natural scenes in the visual cortex
... This leads to the question of how relevant such efficient coding on the single neuron level is and whether single neurons provide a good estimate about a natural stimulus. A recent study [26] compared the responses of single V1 neurons to a population code built on the responses of many recorded n ...
... This leads to the question of how relevant such efficient coding on the single neuron level is and whether single neurons provide a good estimate about a natural stimulus. A recent study [26] compared the responses of single V1 neurons to a population code built on the responses of many recorded n ...
BETA ACTIVITY: A CARRIER FOR VISUAL ATTENTION
... visual centers, including the lateral posterior and pulvinar complex and higher cortical areas. Other supporting data on enhanced beta activity during attentivelike behavior of various species including man, are discussed. Finally, we put forward a general hypothesis which attributes the appearance ...
... visual centers, including the lateral posterior and pulvinar complex and higher cortical areas. Other supporting data on enhanced beta activity during attentivelike behavior of various species including man, are discussed. Finally, we put forward a general hypothesis which attributes the appearance ...
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 ...
Visual Dysfunction in Brain Injury
... Retrospective study of 160 TBI patients (AOA Journal 2007) ...
... Retrospective study of 160 TBI patients (AOA Journal 2007) ...
Diapositive 1 - Andrei Gorea, Ph
... Field, D.J. & Olshausen, B.A. (2004) Sparse coding of sensory inputs. Current Opinion in Neurobiology, 14, 481–487. ...
... Field, D.J. & Olshausen, B.A. (2004) Sparse coding of sensory inputs. Current Opinion in Neurobiology, 14, 481–487. ...
Perception - U
... Scotomas and Blindsight • Individuals with damage to primary visual cortex have scotomas or areas of blindness in corresponding areas of the visual field • Amazingly, when forced to guess, some brain-damaged patients can respond to stimuli in their scotomas (e.g., can grab a moving object or guess ...
... Scotomas and Blindsight • Individuals with damage to primary visual cortex have scotomas or areas of blindness in corresponding areas of the visual field • Amazingly, when forced to guess, some brain-damaged patients can respond to stimuli in their scotomas (e.g., can grab a moving object or guess ...
The Visual Perception System
... Selection: a process which involves coding information to specific features of a stimulus such as size, colour and direction of movement. Occurs during the transmission of info and in the brain. - involves discrimination or differentiating between the various features that make up a visual stimulus. ...
... Selection: a process which involves coding information to specific features of a stimulus such as size, colour and direction of movement. Occurs during the transmission of info and in the brain. - involves discrimination or differentiating between the various features that make up a visual stimulus. ...
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 ...
The Binding Problem
... system. Stereotyped, frequently occurring conjunctions are represented by specific binding units, because this strategy is faster and less susceptible to binding errors. However, because there are not enough neurons to exhaust the whole combinatorial space, population codes provide a possibility to ...
... system. Stereotyped, frequently occurring conjunctions are represented by specific binding units, because this strategy is faster and less susceptible to binding errors. However, because there are not enough neurons to exhaust the whole combinatorial space, population codes provide a possibility to ...
Decoding the Contents of Visual Short
... to enforce an encoding of the stimuli that was based on their perceptual features rather than verbal terms. We used stimuli that had no explicit semantic content, and the similarity task we used strongly focused on the visual features of the stimuli. Also, we instructed the subject not to use a verb ...
... to enforce an encoding of the stimuli that was based on their perceptual features rather than verbal terms. We used stimuli that had no explicit semantic content, and the similarity task we used strongly focused on the visual features of the stimuli. Also, we instructed the subject not to use a verb ...
vikram_slides1
... Periodicity is constant and not considered same weighing window are applied across the stimulus ...
... Periodicity is constant and not considered same weighing window are applied across the stimulus ...
lgn - cinpla
... The lateral geniculate nucleus (LGN) is placed in a prominent position in the early visual pathway. It sits between the retina and the visual cortex, acting as a relay between the two. Inserting a microelectrode into the LGN reveals that the receptive fields are very similar to those in the retina. ...
... The lateral geniculate nucleus (LGN) is placed in a prominent position in the early visual pathway. It sits between the retina and the visual cortex, acting as a relay between the two. Inserting a microelectrode into the LGN reveals that the receptive fields are very similar to those in the retina. ...
Binding Mechanisms in Visual Perception
... determines that the early stages of visual perception is primarily focused on local characters of the perceptual objects (Alais et al, 1998). These local features will be processed in the primary visual cortex (A17) within the same vertical column (Singer and Gray, 1995; Eckhorn et al 1988), and coh ...
... determines that the early stages of visual perception is primarily focused on local characters of the perceptual objects (Alais et al, 1998). These local features will be processed in the primary visual cortex (A17) within the same vertical column (Singer and Gray, 1995; Eckhorn et al 1988), and coh ...
The Visual System: From Eye to Cortex - U
... different perspective, there is a difference in the two retinal images; this binocular disparity is greater for closer things; the degree of binocular disparity associated with a particular visual stimulus helps the brain create a 3-D perception from two 2-D retinal images thus depth perception is p ...
... different perspective, there is a difference in the two retinal images; this binocular disparity is greater for closer things; the degree of binocular disparity associated with a particular visual stimulus helps the brain create a 3-D perception from two 2-D retinal images thus depth perception is p ...
On-center off surround ganglion cells
... strongly to faces than to just about any other category of objects. This region responds more to human, animal and cartoon faces than to a variety of non-face stimuli. Neurons in this area specialize in facial expression, particular identity or ...
... strongly to faces than to just about any other category of objects. This region responds more to human, animal and cartoon faces than to a variety of non-face stimuli. Neurons in this area specialize in facial expression, particular identity or ...
Visual N1
The visual N1 is a visual evoked potential, a type of event-related electrical potential (ERP), that is produced in the brain and recorded on the scalp. The N1 is so named to reflect the polarity and typical timing of the component. The ""N"" indicates that the polarity of the component is negative with respect to an average mastoid reference. The ""1"" originally indicated that it was the first negative-going component, but it now better indexes the typical peak of this component, which is around 150 to 200 milliseconds post-stimulus. The N1 deflection may be detected at most recording sites, including the occipital, parietal, central, and frontal electrode sites. Although, the visual N1 is widely distributed over the entire scalp, it peaks earlier over frontal than posterior regions of the scalp, suggestive of distinct neural and/or cognitive correlates. The N1 is elicited by visual stimuli, and is part of the visual evoked potential – a series of voltage deflections observed in response to visual onsets, offsets, and changes. Both the right and left hemispheres generate an N1, but the laterality of the N1 depends on whether a stimulus is presented centrally, laterally, or bilaterally. When a stimulus is presented centrally, the N1 is bilateral. When presented laterally, the N1 is larger, earlier, and contralateral to the visual field of the stimulus. When two visual stimuli are presented, one in each visual field, the N1 is bilateral. In the latter case, the N1’s asymmetrical skewedness is modulated by attention. Additionally, its amplitude is influenced by selective attention, and thus it has been used to study a variety of attentional processes.