Sentences with phrase «visual brain cortex»

The primary visual brain cortex is normally regarded as the area where eye signals are merely processed, but that has now been refuted by the results Kok and De Lange obtained.

Using fMRI, they discovered that the triangle — although non-existent — activates the primary visual brain cortex.

Not exact matches

According to the latest neuroscience, the human brain uses neurons in the left visual cortex to process written words as whole word units.

From brain - imaging studies, we also know the visual cortex becomes more active while the area [in the brain] responsible for empathy becomes less active.

Using brain scans to compare the gray matter of children with RAD to typically developing children, the researchers found significantly reduced volume of gray matter in the area of the brain known as the left primary visual cortex.

The researchers found that the connectivity of regions involved in vision increased on LSD so that the visual cortex was «talking to» more of the brain.

In a University of California, San Diego School of Medicine study published July 13 in the online journal Nature Neuroscience, a research team led by Takaki Komiyama, PhD, assistant professor of neurosciences and neurobiology, reports that in mouse models, the brain significantly changed its visual cortex operation modes by implementing top - down processes during learning.

Another piece of the puzzle are the signals sent back to the Pulvinar from visual cortex, which seem to make information flow back and forth between the two parts of the brain in a loop.

Information about these images is sent from the eyes to a brain region called the thalamus, and from there on to the visual cortex.

What's more, these genes are expressed in both the auditory and visual cortices of the brain during childhood development, the researchers report today in the Proceedings of the National Academy of Sciences.

Although the role of the visual cortex and other areas of the brain are being identified, and their functions clarified, it is not likely that there is a «truth» center in the brain or a «lying» center.

According to the mri results, 38 minutes after Rennich entered the tube, an area of darkness — of no color at all — appeared on the image of his brain, indicating that the neurons in a small region of the cerebral cortex were no longer transmitting visual information.

The three brain areas AIP, F5 and M1 lay in the cerebral cortex and form a neural network responsible for translating visual properties of an object into a corresponding hand movement.

At the same time, transcranial magnetic stimulation was used to excite the brain's visual cortex, priming the volunteers to see illusory spots of light called phosphenes.

The researchers targeted inhibitory neurons in the visual cortex to turn them «on,» thus silencing that region of the brain.

By peering into the eyes of mice and tracking their ocular movements, researchers made an unexpected discovery: the visual cortex — a region of the brain known to process sensory information — plays a key role in promoting the plasticity of innate, spontaneous eye movements.

According to the scientists, the study offers evidence neurons in the prefrontal cortex of the brain start processing information in anticipation of where we are going to look before we ever do it, suggesting that selective processing might be the mechanism for visual stability.

According to Noudoost, scientists have been trying to learn exactly how the brain processes these visual stimuli during saccadic eye movement and this research offers new evidence that the prefrontal cortex of the brain is responsible for visual stability.

Recording the electrical activity of neurons directly from the surface of the brain, the scientists found that for a simple task, such as repeating a word presented visually or aurally, the visual and auditory cortexes reacted first to perceive the word.

From this, he proposes a new theory for the evolution of the human brain: Homo sapiens developed rounder skulls and grew bigger parietal cortexes — the region of the brain that integrates visual imagery and motor coordination — because of an evolutionary arms race with increasingly wary prey.

The research team performed special brain scans of the visual cortex, which showed marked improvements in brain activities in patients who also improved in field size and acuity.

Without melanin during the embryonic stage, the neuronal tracts leading from the eye to the visual cortex of the brain develop aberrantly, resulting in diminished depth perception.

Research done by Dr. Christopher Pack, from McGill University, who looked at such waves occurring in a region of the visual cortex of the brain, suggests these oscillations could have a role in resetting the sensitivity of neurons after eye movements.

In another study scheduled to be presented at the neuroscience meeting — 21 brain organoid papers are on tap — researchers led by Dr. Isaac Chen, a neurosurgeon at the University of Pennsylvania, implanted human cerebral organoids into the brains of 11 adult rats, specifically the secondary visual cortex.

They detected little or no MHCI expression in some areas of the brain, but they found it in several other places, including the visual cortex while the ocular dominance columns were forming, and in the hippocampus — an area of the brain associated with learning and memory — at all ages.

Sur had severed the neurons connecting the eyes of newborn ferrets to the brain's visual cortex; then he reconnected those same neurons to the auditory cortex.

«The concept of columns in the brain is not entirely new,» observes Hosoya, referring to orientation and ocular dominance columns found in the visual cortices of monkeys and cats.

Nevertheless, studies that compare the vivid imagery of dreams with daytime vision reveal similar patterns of activity in the visual cortex, the largest brain area devoted to vision.

Through conscious decisions that exert themselves in the «top» regions in the front of the brain, he explains, we can control how much we pay attention to the sights flooding into the «bottom» region, the visual association cortex, which stores this sensory information.

The generally accepted model of the brain contains regions devoted to each sense, such as the sight - centric visual cortex.

For instance, what if a patient has visual hallucinations because poor connectivity between the prefrontal cortex and the portion of the brain that governs sight causes the hallucinations to override what the eyes actually see?

«Even the primary visual cortex, the first visual area of the brain that registers input from the eyes, is activated by imagery with the eyes closed.

Although the primary visual cortex usually communicates mainly with other parts of the vision system, many other brain areas contributed to the processing of images in volunteers who received LSD.

«With further development, the new microendoscope could be used to image neuron activity in previously inaccessible parts of the brain such as the visual cortex of primate animal models,» said Ohayon.

This tells the computer exactly how the patient's brain geometry differs from that of a generic brain and allows the boundaries of functional regions, like the visual cortex, to be identified.

All the kids showed the expected early response that develops in brain regions located at the back of the head, above the visual cortex.

UNTIL ABOUT 35 years ago scientists believed there was only a single visual - processing area, called the visual cortex, situated at the back of the brain.

In contrast, visual information taken in by the eyes tends to flow from the occipital lobe — which makes up much of the brain's visual cortex — «up» to the parietal lobe.

At the same time, the researchers monitored nerve firing in a part of the cortex — the ventral intraparietal area — that serves as an interface between the brain's visual and motor processing regions.

The new pathway projects to the visual cortex (V1 for short) in the back of the brain, where the features of the object are analyzed (for color, orientation of edges, movement, and so on).

In those early years, and to a lesser degree today, many neuroscientists believed that the brain is compartmentalized — that visual information, for instance, goes straight from the eye to the visual cortex through a fixed network of nerves.

During memory suppression, he says, activity tapers off in the brain's visual cortex (which regulates visual representation of a memory), hippocampus (responsible for memory formation and retrieval) and amygdala (a region in continuous communication with the hippocampus that formulates emotional responses to memories).

The visual cortex, the largest part of the human brain, is responsible for analyzing information from the eyes and enables us to perceive the visual world.

A new study by MIT neuroscientists reveals how the brain achieves this type of focused attention on faces or other objects: A part of the prefrontal cortex known as the inferior frontal junction (IFJ) controls visual processing areas that are tuned to recognize a specific category of objects, the researchers report in the April 10 online edition of Science.

As you might expect, depriving the visual cortex of half of its expected input is a major change in experience that can trigger changes in brain organization.

With the left or right parietal cortex numbed, the test subjects were less able to detect objects placed in the visual field controlled by the numb side of their brain and did even worse still if there was also an object in the functioning half of the field.

In both cases, the prefrontal cortex — the control center for most cognitive functions — appears to take charge of the brain's attention and control relevant parts of the visual cortex, which receives sensory input.

Using functional magnetic resonance imaging — a technique that monitors brain activity in real time — the Johns Hopkins group found reversing a decision requires ultrafast communication between two specific zones within the prefrontal cortex and another nearby structure called the frontal eye field, an area involved in controlling eye movements and visual awareness.

Instead, it's the largest map to date of the connections between brain cells — in this case, about 200 from a mouse's visual cortex.

The visual information then flowed via the thalamus to the visual cortex and the amygdala, the key brain center for evaluating threat.