CHAPTER 15 THE CENTRAL VISUAL PATHWAYS
... specific layers of the LGN, and specific spatial domains within V1. The visual cortex is organized as an array of spatial domains, or hypercolumns, somewhat like a repeating mosaic pattern of tiles on a floor. Each hypercolumn comprises several different populations of neurons, arranged in a stereot ...
... specific layers of the LGN, and specific spatial domains within V1. The visual cortex is organized as an array of spatial domains, or hypercolumns, somewhat like a repeating mosaic pattern of tiles on a floor. Each hypercolumn comprises several different populations of neurons, arranged in a stereot ...
day2-morning2
... physical interactions between the ear and the brain. • Besides using the hearing mechanism, we listen through our visual system. We observe a person’s facial expression, posture, movement and appearence which provide important cues that may not be obvious by listening to the verbal part of the messa ...
... physical interactions between the ear and the brain. • Besides using the hearing mechanism, we listen through our visual system. We observe a person’s facial expression, posture, movement and appearence which provide important cues that may not be obvious by listening to the verbal part of the messa ...
Now you see it: frontal eye field responses to invisible targets
... flashed target regardless of the monkey’s subsequent report. This result raises several interesting issues. First, it constrains the possible neuronal mechanisms underlying backward masking. In contrast to proposals that masking is mediated by the early visual system, perhaps even by the retina, the ...
... flashed target regardless of the monkey’s subsequent report. This result raises several interesting issues. First, it constrains the possible neuronal mechanisms underlying backward masking. In contrast to proposals that masking is mediated by the early visual system, perhaps even by the retina, the ...
Slide 1 - Elsevier Store
... toward the receptive field increased, and that for saccades away decreased as function of local fractional income, resulting in more reliable spatial selectivity (difference between the two saccade directions) with increasing reward probability. (B) LIP neurons are modulated by limb motor planning. ...
... toward the receptive field increased, and that for saccades away decreased as function of local fractional income, resulting in more reliable spatial selectivity (difference between the two saccade directions) with increasing reward probability. (B) LIP neurons are modulated by limb motor planning. ...
The NTVA framework: Linking Cognition and Neuroscience
... bias parameters. Pertinence values determine which objects are selected (filtering), but perceptual biases determine how the objects are categorized (pigeonholing). In extensive reviews of the psychological attention literature, the TVA model has been shown to account for results from many different ...
... bias parameters. Pertinence values determine which objects are selected (filtering), but perceptual biases determine how the objects are categorized (pigeonholing). In extensive reviews of the psychological attention literature, the TVA model has been shown to account for results from many different ...
The Visual Perception System
... processes such as drawing on past experiences with similar stimuli; judging size, shape and distance; and working out appropriate ways of interpreting and responding to stimuli. Characteristics of the visual perception system: processes reception, transduction, transmission, selection, organization ...
... processes such as drawing on past experiences with similar stimuli; judging size, shape and distance; and working out appropriate ways of interpreting and responding to stimuli. Characteristics of the visual perception system: processes reception, transduction, transmission, selection, organization ...
Visual Dysfunction in Brain Injury
... Retrospective study of 160 TBI patients (AOA Journal 2007) ...
... Retrospective study of 160 TBI patients (AOA Journal 2007) ...
VL_CHAPTER_4
... using a microelectrode. He also demonstrates visual neurons arranged in columns within the visual cortex. Courtesy of Colin Blakemore. RESULTS & DISCUSSION 1. Describe how Blakemore used a patterned card to determine the response properties of neurons in the visual cortex. ...
... using a microelectrode. He also demonstrates visual neurons arranged in columns within the visual cortex. Courtesy of Colin Blakemore. RESULTS & DISCUSSION 1. Describe how Blakemore used a patterned card to determine the response properties of neurons in the visual cortex. ...
Visual System - UAB School of Optometry
... ganglion cells in the retina, connects to parvo cells in LGN, is most strongly associated with extrastriate visual areas in the inferior temporal lobe. Neurons respond well to color and fine detail, not so strongly to rapid motion or low contrast. Magnocellular System: originates with the parasol ga ...
... ganglion cells in the retina, connects to parvo cells in LGN, is most strongly associated with extrastriate visual areas in the inferior temporal lobe. Neurons respond well to color and fine detail, not so strongly to rapid motion or low contrast. Magnocellular System: originates with the parasol ga ...
Decoding the Contents of Visual Short
... subjects were confident that they could execute C, Stimuli from an example trial. Arrows indicates which test item is more similar to a given sample. For presentation purposes, the the task without using semantic terms as part of correlation between remembered sample and target shown here is higher ...
... subjects were confident that they could execute C, Stimuli from an example trial. Arrows indicates which test item is more similar to a given sample. For presentation purposes, the the task without using semantic terms as part of correlation between remembered sample and target shown here is higher ...
Perception - Vision
... hierarchical fashion with increasingly higher visual areas being more closely related to our internal conscious experience. But if this is the case how to explain awareness of all details in the observed image? The interactive theory of visual consciousness emphasizes interactions between lower an ...
... hierarchical fashion with increasingly higher visual areas being more closely related to our internal conscious experience. But if this is the case how to explain awareness of all details in the observed image? The interactive theory of visual consciousness emphasizes interactions between lower an ...
Sensory modalities are not separate modalities: plasticity and
... perception [26,27]. The stimulus, however, has to be synchronized with the visual coincidence of two objects (the effective time window was found to be in the range of –300 to +200 ms, –600 to +100 ms and –100 to +100 ms for auditory, tactile and vision stimuli, respectively; see Figure 2b). Thus, t ...
... perception [26,27]. The stimulus, however, has to be synchronized with the visual coincidence of two objects (the effective time window was found to be in the range of –300 to +200 ms, –600 to +100 ms and –100 to +100 ms for auditory, tactile and vision stimuli, respectively; see Figure 2b). Thus, t ...
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 ...
Dear Notetaker:
... Severity of symptoms correlated with volume of axonal white matter Patients 2,4, and 6 appear significantly different in the thickness shown in the image, but remember the total volume of axonal white matter was measured, not just the thickness in the image The ILF runs along the lateral walls ...
... Severity of symptoms correlated with volume of axonal white matter Patients 2,4, and 6 appear significantly different in the thickness shown in the image, but remember the total volume of axonal white matter was measured, not just the thickness in the image The ILF runs along the lateral walls ...
KleinCh5
... Graded height-related stimuli presented via virtual reality were effective in treating acrophobia. ...
... Graded height-related stimuli presented via virtual reality were effective in treating acrophobia. ...
Chapter 6
... Role of the visual association cortex Two streams of visual analysis – Visual info receive from the striate cortex is analyzed in the visual assc cortex – Neurons in the striate cortex project to the extrastriate cortex, which surrounds the visual assc cortex – The primate extrastriate cortex consi ...
... Role of the visual association cortex Two streams of visual analysis – Visual info receive from the striate cortex is analyzed in the visual assc cortex – Neurons in the striate cortex project to the extrastriate cortex, which surrounds the visual assc cortex – The primate extrastriate cortex consi ...
FIGURE LEGENDS FIGURE 46.1 Lateral viewof a human brain
... its response. In the right panel the monkey executes the instructed saccade. The neural response remains high until after the eye movement. FIGURE 46.7 A salience representation can be viewed as an intermediate representation that interacts with multiple behavioral systems (visual, motor, cognitive ...
... its response. In the right panel the monkey executes the instructed saccade. The neural response remains high until after the eye movement. FIGURE 46.7 A salience representation can be viewed as an intermediate representation that interacts with multiple behavioral systems (visual, motor, cognitive ...
Topographic Mapping with fMRI
... you can see by eye that there are 15 cycles (the stimulation frequency) and we want to know the phase of that signal This is an excellent Fourier problem! The Fourier Transform breaks down a signal into its component sinusoids, giving the amplitude and phase at each frequency. ...
... you can see by eye that there are 15 cycles (the stimulation frequency) and we want to know the phase of that signal This is an excellent Fourier problem! The Fourier Transform breaks down a signal into its component sinusoids, giving the amplitude and phase at each frequency. ...
Slide 1 - Elsevier Store
... FIGURE 26.11 Optical imaging of functional architecture in the primate visual cortex. (A) Schematic diagram of the experimental setup for optical imaging. Digitized images of a region of visual cortex (as in B) are taken with a CCD camera while the anesthetized, paralyzed animal is viewing a visual ...
... FIGURE 26.11 Optical imaging of functional architecture in the primate visual cortex. (A) Schematic diagram of the experimental setup for optical imaging. Digitized images of a region of visual cortex (as in B) are taken with a CCD camera while the anesthetized, paralyzed animal is viewing a visual ...
Localization of Cognitive Operations
... activation of the internally stored visual code of a word is particularly good. Normal subjects show evidence that the stimulus duration necessary for perceiving individual letters within words is shorter than for perceiving the same letter when it is presented in isolation (12). This idea suggests ...
... activation of the internally stored visual code of a word is particularly good. Normal subjects show evidence that the stimulus duration necessary for perceiving individual letters within words is shorter than for perceiving the same letter when it is presented in isolation (12). This idea suggests ...
class_2015_readinglist
... external or internal piece of information goes beyond nonconscious processing and gains access to conscious processing, a transition characterized by the existence of a reportable subjective experience. Converging neuroimaging and neurophysiological data, acquired during minimal experimental contras ...
... external or internal piece of information goes beyond nonconscious processing and gains access to conscious processing, a transition characterized by the existence of a reportable subjective experience. Converging neuroimaging and neurophysiological data, acquired during minimal experimental contras ...
Visual Coding and the Retinal Receptors
... in space from which light strikes it. • For other visual cells, receptive fields are derived from the visual field of cells that either excite or inhibit. – Example: ganglion cells converge to form the receptive field of the next level of cells. ...
... in space from which light strikes it. • For other visual cells, receptive fields are derived from the visual field of cells that either excite or inhibit. – Example: ganglion cells converge to form the receptive field of the next level of cells. ...
P312 Ch05_PerceivingObjectsII
... a) picture of Harrison Ford, b) a picture of someone else, or c) a random texture. Each presentation was about 50 ms, followed by a masking stimulus. Observers responded by indicating “Harrison Ford”, “Other Face” , or “Nothing”. They recorded brain activity occurring before the response of “Harriso ...
... a) picture of Harrison Ford, b) a picture of someone else, or c) a random texture. Each presentation was about 50 ms, followed by a masking stimulus. Observers responded by indicating “Harrison Ford”, “Other Face” , or “Nothing”. They recorded brain activity occurring before the response of “Harriso ...
Visually Induced Ocular Torsion
... stimuli tilt. The response was well conjugate for the right and left eye. In the first study, a visual scene enriched with spatial clues important for maintaining posture was found to induce significantly more torsion compared to a scene without spatial clues. The degree of stimuli tilt had no signi ...
... stimuli tilt. The response was well conjugate for the right and left eye. In the first study, a visual scene enriched with spatial clues important for maintaining posture was found to induce significantly more torsion compared to a scene without spatial clues. The degree of stimuli tilt had no signi ...
Visual extinction
Visual extinction is a neurological disorder which occurs following damage to the parietal lobe of the brain. It is similar to, but distinct from, hemispatial neglect. Visual extinction has the characteristic symptom of difficulty to perceive contralesional stimuli when presented simultaneously with an ipsilesional stimulus, but the ability to correctly identify them when not presented simultaneously. Under simultaneous presentation, the contralesional stimulus is apparently ignored by the patient, or extinguished. This deficiency may lead to difficulty on behalf of the patient with processing the stimuli’s 3D position.