Occipital Lobe
... In every case, the damage included the region of the occipital cortex that surrounds and includes the calcarine fissure. This region contains the part of the cortex in which Gennari's stripe is most visible. After a century, Henschen confirmed Gennari's ...
... In every case, the damage included the region of the occipital cortex that surrounds and includes the calcarine fissure. This region contains the part of the cortex in which Gennari's stripe is most visible. After a century, Henschen confirmed Gennari's ...
Document
... (LGN) cells receive input from Retinal ganglion cells from both eyes. Both LGNs represent both eyes Neurons in retina, LGN and visual cortex have receptive fields: – Neurons fire only in response to higher/lower illumination within receptive field – Neural response depends (indirectly) on illuminati ...
... (LGN) cells receive input from Retinal ganglion cells from both eyes. Both LGNs represent both eyes Neurons in retina, LGN and visual cortex have receptive fields: – Neurons fire only in response to higher/lower illumination within receptive field – Neural response depends (indirectly) on illuminati ...
Perceptual Expectation Evokes Category
... that ranged in duration from 0 to 6 s randomly; the onset of the image coherence interval, and thus the earliest sensory information about the target image, was therefore unpredictable. The noise interval was a dynamic display that ‘‘cohered’’ from one random phase map to another random phase map (r ...
... that ranged in duration from 0 to 6 s randomly; the onset of the image coherence interval, and thus the earliest sensory information about the target image, was therefore unpredictable. The noise interval was a dynamic display that ‘‘cohered’’ from one random phase map to another random phase map (r ...
Attention and Consciousness
... improves the accuracy and speed of detecting target at this location. Attention can be based on internal goals (finding a friend in the crowd) or external environment (alarm sound, bright colors) ...
... improves the accuracy and speed of detecting target at this location. Attention can be based on internal goals (finding a friend in the crowd) or external environment (alarm sound, bright colors) ...
Synchronized Activities among Retinal Ganglion Cells in Response
... three different retinas were analyzed. Table 1 shows the statistic of the group size under various conditions. It is notable that during natural movie, groups could contain three or more neurons; however, most of groups only contain two neurons during pseudo-random checker-board stimuli. Table 1. St ...
... three different retinas were analyzed. Table 1 shows the statistic of the group size under various conditions. It is notable that during natural movie, groups could contain three or more neurons; however, most of groups only contain two neurons during pseudo-random checker-board stimuli. Table 1. St ...
Some Analogies Between Visual Cortical and Genetic Maps
... Kohne 9 developed a technique for determining the abundance of replicated DNA sequences for the entire genomes of higher organisms. They separated the complementary stranQsof the DNA and sheared them into fragments of about 400 nucleotides in length. Then they measured the time required for the comp ...
... Kohne 9 developed a technique for determining the abundance of replicated DNA sequences for the entire genomes of higher organisms. They separated the complementary stranQsof the DNA and sheared them into fragments of about 400 nucleotides in length. Then they measured the time required for the comp ...
WHEN THE visual cortex in the occipital lobe is electrically
... higher than we obtained in the first patient, they were still much lower than these subjects' surface thresholds, both of which were 2 mA. Most of the phosphenes elicited at the lowest thresholds of intracortical stimulation in subject SE had a circular shape and subtended approximately 1-2" of visu ...
... higher than we obtained in the first patient, they were still much lower than these subjects' surface thresholds, both of which were 2 mA. Most of the phosphenes elicited at the lowest thresholds of intracortical stimulation in subject SE had a circular shape and subtended approximately 1-2" of visu ...
David Hunter Hubel. 27 February 1926 — 22 September 2013
... when Mike suggested placing wires in the cortex of cats and recording from them while they were awake. The attempt was a failure, but the idea captured David’s imagination. He began developing techniques for recording from animals while they were awake. He first developed a tough tungsten microelect ...
... when Mike suggested placing wires in the cortex of cats and recording from them while they were awake. The attempt was a failure, but the idea captured David’s imagination. He began developing techniques for recording from animals while they were awake. He first developed a tough tungsten microelect ...
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 ...
An oscillation-based model for the neuronal basis
... field of a V4 neuron selective for red, the neuron will respond vigorously if the monkey attends to the red stimulus, but respond much less if the monkey is attending to the green stimulus. The stimulus is identical in both cases (a red and a green bar); the difference is only in the internal state ...
... field of a V4 neuron selective for red, the neuron will respond vigorously if the monkey attends to the red stimulus, but respond much less if the monkey is attending to the green stimulus. The stimulus is identical in both cases (a red and a green bar); the difference is only in the internal state ...
Visual Fields in Ophthalmology - New York Eye and Ear Infirmary
... • upper right and left • middle right and left • lower right and left ...
... • upper right and left • middle right and left • lower right and left ...
11 Attention
... B. What brain areas are involved? Observed in high-level cognitive and numerous sensory areas e.g., Area V1 to visual cortical areas in the parietal and temporal lobes ...
... B. What brain areas are involved? Observed in high-level cognitive and numerous sensory areas e.g., Area V1 to visual cortical areas in the parietal and temporal lobes ...
Mechanisms of Visual Attention in the Human Cortex
... using functional magnetic resonance imaging (Kastner et al 1997, 1998a). In these studies, subjects were presented with images of colorful, complex stimuli in four nearby locations of the upper right quadrant of the visual field while they maintained fixation. Fixation was ensured by having subjects ...
... using functional magnetic resonance imaging (Kastner et al 1997, 1998a). In these studies, subjects were presented with images of colorful, complex stimuli in four nearby locations of the upper right quadrant of the visual field while they maintained fixation. Fixation was ensured by having subjects ...
Brain Mechanisms of Memory and Cognition
... Higher visual cortical processing can be roughly divided into areas that are concerned with the analysis of objects (form, colour, etc.), and areas that are concerned with their spatial location and movement. The former appears to be mediated by a ventral stream, and the latter by a dorsal stream (U ...
... Higher visual cortical processing can be roughly divided into areas that are concerned with the analysis of objects (form, colour, etc.), and areas that are concerned with their spatial location and movement. The former appears to be mediated by a ventral stream, and the latter by a dorsal stream (U ...
Midterm 1
... this, the only information that can be processed by the left hemisphere of the brain by someone who has their corpus callosum severed is information that is being processed somewhere else in the left hemisphere. Since the left hemisphere of the brain actually processes information from the right sid ...
... this, the only information that can be processed by the left hemisphere of the brain by someone who has their corpus callosum severed is information that is being processed somewhere else in the left hemisphere. Since the left hemisphere of the brain actually processes information from the right sid ...
Saccadic Suppression of Retinotopically Localized Blood Oxygen
... run. For purposes of quality control, all detected saccadic onsets from all trials were visually inspected by plotting them recursively over the trial period ranging from 100 ms before and after the detected onset point (supplemental Fig. 4, available at www.jneurosci.org as supplemental material). ...
... run. For purposes of quality control, all detected saccadic onsets from all trials were visually inspected by plotting them recursively over the trial period ranging from 100 ms before and after the detected onset point (supplemental Fig. 4, available at www.jneurosci.org as supplemental material). ...
Sense Of Vision
... sense of sight and allowing us to observe and learn more about the surrounding world than we do with any of the other four senses. We use our eyes in almost every activity we perform, whether reading, working, watching television or writing etc. • The eye is able to detect bright light or dim light, ...
... sense of sight and allowing us to observe and learn more about the surrounding world than we do with any of the other four senses. We use our eyes in almost every activity we perform, whether reading, working, watching television or writing etc. • The eye is able to detect bright light or dim light, ...
On the importance of the transient visual response in the superior
... required to stimulate immediate action, either towards stimuli of interest (e.g. prey) or away from perilous stimuli (e.g. large looming things). The SC mediates these two fast responses through access to different motor output channels [4,5]. Unlike other parts of the visual orienting network (see ...
... required to stimulate immediate action, either towards stimuli of interest (e.g. prey) or away from perilous stimuli (e.g. large looming things). The SC mediates these two fast responses through access to different motor output channels [4,5]. Unlike other parts of the visual orienting network (see ...
Vigabatrin: The Problem of Monitoring for Peripheral Vision Loss in
... Vigabatrin has been used around the world to treat epilepsy since the early 1990’s and has recently been approved for use in the United States. Vigabatrin is approved for the management of refractory, complex partial seizures in adults who have failed a number of other anti-epileptic drugs. However ...
... Vigabatrin has been used around the world to treat epilepsy since the early 1990’s and has recently been approved for use in the United States. Vigabatrin is approved for the management of refractory, complex partial seizures in adults who have failed a number of other anti-epileptic drugs. However ...
sensory1
... lips, palm, fingertip, calf). For touch discrimination, small receptive fields allow greater accuracy in “two point discrimination” test (upcoming lab!) ...
... lips, palm, fingertip, calf). For touch discrimination, small receptive fields allow greater accuracy in “two point discrimination” test (upcoming lab!) ...
Local Field Potential in the Visual System
... 400 ms after the presentation of a visual stimulus. The time of the first observable VEP deflection is called visual response latency and represents the time of arrival of visual signals from the eye via the visual pathway. Subsequent VEP deflections are related to local processing of the visual signal ...
... 400 ms after the presentation of a visual stimulus. The time of the first observable VEP deflection is called visual response latency and represents the time of arrival of visual signals from the eye via the visual pathway. Subsequent VEP deflections are related to local processing of the visual signal ...
Human brain spots emotion in non humanoid
... latencies to lateral than midline sites. Such effect supported the customary parietal–lateral distribution of the N170. DISCUSSION We compared ERP and behavioural responses to emotion elicited by robotic and human displays. The temporal dynamics of early brain electrical responses showed two success ...
... latencies to lateral than midline sites. Such effect supported the customary parietal–lateral distribution of the N170. DISCUSSION We compared ERP and behavioural responses to emotion elicited by robotic and human displays. The temporal dynamics of early brain electrical responses showed two success ...
Primary Visual Pathway
... • Length cells - respond to length of a bar that was moved across a receptive field • Direction cells - respond to direction of a bar moving across the receptive field. ...
... • Length cells - respond to length of a bar that was moved across a receptive field • Direction cells - respond to direction of a bar moving across the receptive field. ...
Slide 1
... smaller than the attentional effects measured by Treue and Maunsell (1996) ( >80%) even though both studies required similar tasks ...
... smaller than the attentional effects measured by Treue and Maunsell (1996) ( >80%) even though both studies required similar tasks ...