Articles tagged with Visual Cortex
Research found that 65% of visual cortex regions in blind individuals show synchronized activity when listening to audio clips, indicating a higher-order processing role. The study suggests an underlying organization dictates the brain's repurposing of unused regions in blind people.
Scientists have developed a new type of intraneural electrode called OpticSELINE, which stimulates the optic nerve and sends messages directly to the brain. This innovative approach bypasses the eyeball entirely, offering a promising solution for restoring sensory function in the blind.
Researchers at the Salk Institute discovered that mammals use a similar 'distributed circuit' approach to distinguish odors, with the size of brain components scaling across species. This finding may have implications for understanding other parts of the brain and developing more efficient machine learning systems.
A new study led by UC Riverside psychologist Brent Hughes found that the tendency to recognize differences in own-race faces is greater than in other-race faces, a phenomenon known as the 'other-race effect.' This bias occurs even at early stages of sensory perception and can affect downstream beliefs and behaviors.
A new Salk study found that neurons selectively respond to particular combinations of color and shape, rather than extracting them separately. This breakthrough challenges the long-held notion that color and shape are processed in the early stages of vision.
A study led by York University researchers found that children's brains can compensate for lost regions of the visual cortex after surgery, retaining normal visual perception. The brain's plasticity allows it to re-wire itself in a way not seen in adults, enabling children to read and recognize faces with minimal impairment.
Researchers identify preferential activation of a brain region to Pokémon characters in adults who played videogames extensively as children. The study sheds light on the development of dedicated brain regions for processing visual stimuli.
Researchers have developed a new imaging technique that allows them to see how living monkey brains are wired, revealing precise connections between the two hemispheres. The opto-OISI method combines optical intrinsic signal imaging and optogenetics to map brain connections point-to-point.
Researchers found that retinal ganglion cells depend on the primary visual area of the brain to remain healthy, leading to permanent visual impairment. However, some eye cells remain connected to unscathed neurons in the visual cortex, suggesting a potential for vision recovery through neuroplasticity-based therapies.
Researchers used advanced brain scans to map the visual cortex in Old World monkeys, finding complex topographic organisation unlike previously thought. This improved understanding will enable more precise navigation of the brain and potentially reveal human visual cortex organization.
A study found that mice raised in an enriched environment with social interaction and mental stimulation can transmit the brain benefits to their offspring through changes in gene expression. Despite being raised in the same impoverished environment, the offspring maintained lifelong visual cortex plasticity.
Researchers have identified neurons in the human visual cortex that selectively respond to faces, a significant breakthrough in understanding face recognition. These neurons were found to respond strongly to both familiar and unfamiliar faces, as well as images of humans and animals in videos.
Researchers at UC San Francisco discovered a second visual system in the mouse cerebral cortex, challenging 75-year-old dogma of mammalian vision. The post-rhinal cortex (POR) obtains visual data directly from the superior colliculus, an evolutionarily ancient sensory processing center.
A study found that auditory stimulation affects responses to tactile stimulation in mice and rats, highlighting the interconnectedness of senses. The findings suggest that the barrel cortex, which processes touch, also treats auditory stimuli separately, leading to enhanced detection of prey or predators in nocturnal animals.
The endocast of Australopithecus fossil Little Foot shows a brain with asymmetrical structures similar to modern humans, but also features distinct from us, including an expanded visual cortex and reduced parietal association cortex. This suggests that the brain's complexity evolved over time in response to environmental pressures.
The study challenges traditional understanding of brain circuits, finding that neurons in thicker areas have longer, more complex structures. This affects how individual neurons process sensory input and compare it to internal models.
A study published in Neuron demonstrates that neurons with the same projection target are more likely to connect with each other, despite being neighbors. This 'exclusion' principle of connectivity highlights a new rule of connectivity in the neocortex.
Kenneth Miller received the 2018 Swartz Prize in Theoretical and Computational Neuroscience for his contributions to modeling cerebral cortex function. His research has led to a reliable model of synaptic plasticity, confirmed by experimental data.
Researchers discovered robust long-range patterns of correlated spontaneous activity in immature ferrets, contradicting expectations. These early activity patterns served as a template for the development of mature distributed networks, suggesting that 'local connections build a network activity scaffold'.
Scientists discovered that developing brain networks act locally to build globally, with spontaneous activity patterns correlating between distant populations of neurons. This finding suggests that long-range order originates from neural activity driven by short-range connections.
A study published in Scientific Reports found that 80% of tracked neurons were reliably activated by the same oriented lines throughout a two-week period. The researchers used two-photon microscopy to visualize hundreds of neurons and tested an extensive range of stimuli, including varying line thickness.
Researchers found that the left hemisphere of the boy's brain compensated for visual tasks, but he couldn't see the left half of the world. Despite losing parts of his visual system, UD performed normally on pattern perception and had age-appropriate intellect and language skills.
Research reveals that the randomness of the piriform cortex is critical to distinguishing between similar odors, with each neuron connected to nearly every single odor receptor. This system encodes complex information and makes it robust to noise.
Researchers mapped brain activity in response to letters and words in specific brain regions, finding distinct representations for letter-forms and word-forms. The study sheds light on the neural basis of reading in the human brain.
A study published in JNeurosci reveals the hippocampus plays a key role in predicting visual information based on past experiences. The findings suggest that memories can influence how we perceive the world, with the brain 'filling in' missing information to create a coherent picture.
A new study at MIT's Picower Institute found that the posterior parietal cortex plays a crucial role in converting vision into action. The research team identified specific neurons in this region that respond to visual patterns and motor actions, suggesting a key link between seeing and acting.
New study finds that eye dominance and visual acuity are governed by separate areas of the brain, making it possible to correct one without affecting the other. Researchers can now address acuity directly, bypassing normal eye dominance restoration.
Researchers found that TMS facilitates the reorganization of neuronal connections in the visual cortex, which could be beneficial for therapies. A short visual training after TMS treatment can remodel the maps and incorporate biases in information content.
Researchers found that brain regions responsible for understanding what we see have trouble communicating with other brain networks, increasing risk of mental illness. This breakdown may help target interventions and therapies.
Researchers trained a deep neural network to perform two auditory tasks, including speech and music identification. The model accurately replicated human performance and provided evidence for the hierarchical organization of the auditory cortex.
Researchers used a novel barcode-based tracing method to map the projection patterns of individual neurons in the visual cortex. The study found that most primary visual cortex neurons distribute information to multiple downstream areas, rather than projecting to a single target.
A new brain-mapping technology has revealed that neurons in the primary visual cortex communicate with higher visual areas of the cortex more broadly than previously believed, following specific patterns. This discovery could provide a means of linking visual information across the brain to form complex percepts.
Researchers found a brain circuit in the primary visual cortex that combines head and visual movement signals, enabling appropriate behavioral responses. This circuit involves the retrosplenial cortex, which encodes spatial navigation information.
A new study from MIT reveals that the brain uses both speed and rhythmic patterns to track objects in motion, leading to more accurate estimates. Researchers found that participants made better predictions when they had access to information about both speed and timing.
Researchers trained visual neurons to control a computer-generated tone and a robotic arm using neuroplasticity. The connections from the cortex to the striatum were key to this learning, representing a feedback loop that may be essential for learning and memory throughout the brain.
Researchers found diverse landscape of gene expression changes across all cell types in visual cortex, involving 611 genes linked to neural connectivity. The study suggests that each cell has a unique genetic program tailored to its function within the neural circuit.
Researchers successfully used microstimulation to elicit movements in monkeys by associating specific areas of the premotor cortex with particular actions. This breakthrough could lead to the development of brain/computer interfaces that bypass damaged brain areas, benefiting individuals with stroke or neurological disorders.
Researchers at Vanderbilt University found that our brains experience momentary unconscious gaps in visual perception when shifting attention. The study, published in Cerebral Cortex, discovered a brain mechanism underlying the phenomenon of mind's eye blink.
Scientists have discovered that the thalamus, a deep brain structure, plays a crucial role in regulating critical periods of learning and development. The findings, published in Nature Neuroscience, have important implications for understanding developmental problems such as intellectual disability and albinism.
Researchers at the University of Washington School of Medicine found that different brain areas interact to recognize partially covered shapes. The study reveals how signals from the visual cortex and thinking sections of the brain work together to enhance shape recognition.
Researchers have discovered a new brain area, the retrosplenial cortex, that plays a crucial role in spatial memory and navigation. This finding could lead to a better understanding of how our brains process spatial information and may shed light on neurological conditions such as Alzheimer's disease.
Researchers at University of Utah Health successfully rejuvenated the plasticity of adult mouse brains, specifically in the visual cortex, by triggering a shift with a single gene. This breakthrough suggests a potential target for new treatments that could recover brain youthful potential and reduce cognitive decline with aging.
Neurons in the brain receive information from large parts of the visual field to form a coherent perceptual image. The study found that neurons are most likely connected if they react to edges on a common axis, mirroring the structure of the visual world.
The visual cortex develops until late 30s or early 40s, contradicting previous expectations that it matures in first few years of life. This discovery extends the timeline by 4.5 years, challenging current understanding of brain function and sensory areas development.
A new study found that learning to read in adulthood reorganizes deep brain structures, including the thalamus and brainstem, which helps filter visual input. This process enhances reading capabilities, with better alignment of signal timings between brain regions leading to improved navigation through texts.
Researchers at the University of Rochester Medical Center developed a personalized visual training program to reroute visual information around damaged areas of the brain. Patients regained large swaths of rudimentary sight, with some able to recover vision enough to drive again.
A study by Ohio State University researchers reveals that the brain combines 2-D and depth information when representing 3-D objects. The fMRI data showed that early visual areas focus on 2-D location, while later areas prioritize depth information, suggesting a gradual shift towards 3-D perception.
Researchers at UC Santa Barbara found that low-intensity exercise increases activation in the visual cortex, enhancing information representation and selectivity. This effect is linked to increased arousal, which may provide a competitive advantage.
A new study published in Nature reveals that the visual cortex is involved in promoting plasticity of innate eye movements. Researchers used optogenetics to silence the visual cortex and observed a significant reduction in the activity of the optokinetic reflex, suggesting its role in mediating plasticity between the two reflexes.
Researchers have successfully developed three novel approaches to restoring vision in individuals with severe eye injuries. Dr. Rizzo's team aims to bypass the damaged optic nerve, while Dr. Weitz's team focuses on generating precise images without causing inaccurate visual field distortions. Meanwhile, Dr. Kao explores using optical p...
The study reveals alternating periods of high- and low-wavelet entropy (WS) in rat V1 during image processing, indicating dynamic LFPs with synchronized and complexly ordered activity. The parameters RWE and WS quantify neural population activity characteristics that may help decipher visual processing and object recognition.
Researchers found that even when conflicting information is invisible, the human brain initiates mechanisms to resolve it. This occurs in the early visual cortex with minimal involvement of the fronto-parietal cortex.
The frontal cortex plays a crucial role in controlling vision, actively constructing the visual scene and making decisions about it. The research found that the brain's organization of perception can lead to distractions like texting while driving, which can impair vision and increase the risk of accidents.
Recent research reveals that visual brain maps are dark-centric, with greater precision for darker stimuli. This dark-centric organization enables the brain to represent different positions of light spots as rotating around a dark anchor in visual space.
Scientists at MPFI have discovered a simple rule that explains how neural circuits combine information supplied by different types of cells in the retina to build a coherent representation of visual information. The discovery reveals that fine-scale retinal spatial information is preserved by OFF response regions, while ON response reg...
A recent York University brain study found that a one-second delay in frontal cortex processing can lead to errors in high-accuracy tasks, such as tennis. The researchers recorded signals in the frontal cortex during memory delays and analyzed visual responses and motor activity.
Researchers from Imperial College London have visualized the effects of LSD on the human brain for the first time, revealing complex changes in brain activity that underlie psychedelic experiences. The study found that LSD alters the way brain networks process information, leading to a more integrated and unified brain state.
A study by Carnegie Mellon University researchers suggests that neuronal feedback in the visual system can alter our perception of optical illusions. The study found that 20% of visual cortex activity is due to feedback from higher cortical areas, which may explain why we see completed shapes like the Kanizsa triangle.
Researchers demonstrate that human brain uses different frequency channels depending on the direction of information transport, similar to macaque monkeys. The findings might help understand the cause of psychiatric illnesses where top-down and bottom-up flows get mixed up.
Researchers found that physical activity enhances neuroplasticity in the visual cortex of adult humans, paving the way for non-invasive therapeutic strategies. The study suggests exercise plays a crucial role in brain health and recovery, particularly for individuals with conditions like amblyopia.