Tag

Visual Perception

All articles tagged with #visual perception

science2 days ago•18 min saved

Ecology’s tempo sets the speed of sight across the animal kingdom

A Nature Ecology & Evolution study analyzes 237 species (from jellyfish to vertebrates) and finds that species with fast-paced ecologies have higher temporal resolution in vision (flicker-fusion thresholds), especially those that fly and rely on pursuit predation. Ambush predators show tempo that depends on environmental context, suggesting perceptual tempo is shaped by ecological demands. The findings support Autrum’s idea that ecology’s pace drives variation in how quickly animals perceive their world.

via Nature|

#flicker-fusion-frequency #phylogenetic-comparative-methods #predation-mode

science3 months ago•3 min saved

Scientists Discover Bumblebees Can Learn and Interpret Morse Code

Scientists trained bumblebees to distinguish between different durations of light patterns, similar to Morse code, demonstrating their ability to process temporal information and make decisions based solely on visual cues, revealing complex cognitive abilities in insects.

via ScienceAlert|

#animal-cognition #bumblebees #morse-code

science4 months ago•5 min saved

Scientists Determine Human Eye's Resolution Limit for Ultra-HD TVs

Researchers from Cambridge and Meta Reality Labs found that the human eye has a resolution limit around 94 pixels per degree for grayscale images, and lower for color images, suggesting that ultra-HD TVs beyond a certain resolution (like 4K or 8K) may not provide noticeable benefits in typical home viewing conditions.

via Tech Xplore|

#4k #8k #display-technology

entertainment5 months ago•3 min saved

Test Your Speed: Spot the Polar Bear in 15 Seconds

An optical illusion challenges viewers to find a hidden polar bear in a snowy Arctic scene within 15 seconds, highlighting how our brains process visual cues and the fun of perception puzzles.

via valleyvanguardonline.com|

#brain-training #entertainment #optical-illusions

science5 months ago•5 min saved

Lasers and Neurons Unveil How the Brain Creates Visual Illusions

Scientists discovered specialized IC-encoder neurons in the brain that actively construct visual illusions by filling in missing contours, revealing that perception is an active, top-down process with implications for understanding perception disorders like schizophrenia.

via neurosciencenews.com|

#brain-circuits #illusion #neurons

science6 months ago•3 min saved

Revealing the Retina's Role in Synchronizing Visual Signals

Researchers have discovered that the human retina actively synchronizes visual signals before they reach the brain by adjusting nerve fiber diameters and conduction speeds, ensuring a unified and precise visual experience. This process begins in the retina itself, challenging previous assumptions that synchronization occurs only in the brain.

via Neuroscience News|

#axons #brain #neural-synchronization

health7 months ago•3 min saved

Prosopometamorphopsia: The Rare Condition Turning Faces into Dragons

Prosopometamorphopsia, also known as 'Demon Face Syndrome,' is a rare neurological disorder where individuals see faces as distorted or transformed into other images, such as dragons or zombies, often caused by brain damage affecting visual processing. The condition is extremely rare, with only around 75 reported cases, and can significantly impact perception and quality of life.

via IFLScience|

#demon-face-syndrome #face-distortion #health

science8 months ago•5 min saved

Neuroscientists Discover Brain's Consciousness Gatekeeper

A study published in Science reveals that the thalamus, particularly its intralaminar and medial nuclei, actively initiates conscious visual perception by influencing the prefrontal cortex, challenging the traditional view of the thalamus as merely a sensory relay. Using deep brain recordings from patients, researchers found early and strong activity in these thalamic regions during moments of awareness, suggesting they serve as a gateway for consciousness. The findings highlight the thalamus's active role in shaping conscious experience, although the study's small sample size and clinical context limit generalization.

via PsyPost|

#brain-activity #consciousness #neuroscience

science8 months ago•1 min saved

Neuroscientists Explain Optical Illusions

The article discusses how two neuroscientists view optical illusions, highlighting a winning illusion from the 2021 Best Illusion of the Year contest that demonstrates the limits of human perception through a video where objects appear to change or disappear, illustrating the fascinating ways our brains interpret visual information.

via The New York Times|

#best-illusion-of-the-year #neuroscience #optical-illusions

science8 months ago•3 min saved

The Human Mind's Perception: Seeing What We Want to See

Scientists have discovered that the human brain doesn't see exactly what is in front of us but instead predicts what will happen next based on expectations and memory, using less visual processing when predictions are accurate. This finding highlights the brain's efficiency and the role of memory in perception.

via Boy Genius Report|

#brain-activity #human-brain #neuroscience

science1 year ago•4 min saved

How the Brain Keeps Vision Steady Despite Eye Movements

A study by the University of Münster reveals that the brain's mechanism for stabilizing vision during rapid eye movements fails with non-rigid motions like rotating vortices, leading to visual instability. This challenges existing models of visual processing, showing that smooth and rapid eye movements are processed through different neural pathways. These findings could enhance research into cognitive and neurodegenerative disorders by providing insights into visual compensation mechanisms.

via Neuroscience News|

#cognitive-research #eye-movements #neuroscience

neuroscience1 year ago•5 min saved

"OpenScope Project Reveals Brain's Hidden Mechanisms"

The OpenScope program by the Allen Institute is launching four new projects to study neural activity in mice, focusing on psilocybin's effects, motion perception, visual texture recognition, and subtle changes in appearance. Using advanced imaging techniques, the research aims to enhance understanding of brain functions and disorders, with all data made globally accessible.

via Neuroscience News|

#brain-activity #neural-circuits #neuroscience

lifestyle1 year ago•4 min saved

"117 Hilarious Pareidolia Pics That Show Our Brains' Wild Imagination"

Pareidolia is a phenomenon where people see familiar faces or shapes in random objects, driven by the brain's tendency to recognize patterns. This article showcases 117 amusing examples of pareidolia, from everyday items to famous instances like NASA's Mars face and artistic uses by Leonardo da Vinci. The phenomenon has historical roots and even sparked high-value auctions for items resembling famous figures.

via Bored Panda|

#art #lifestyle #nasa

science1 year ago•4 min saved

"Study Reveals Alcohol's Impact on Visual Symmetry Processing"

A new study published in Psychophysiology reveals that moderate alcohol consumption does not significantly impair the brain's ability to detect visual symmetry, despite affecting early stages of visual processing. Researchers found that while alcohol slightly reduced the brain's response to symmetry in some tasks, the overall perception of symmetry remained robust. The study highlights the importance of replicating unexpected results and suggests that individual differences in alcohol consumption habits can influence visual processing.

via PsyPost|

#alcohol #brain-activity #eeg

neuroscience1 year ago•3 min saved

"How the Brain Chooses Which Memories to Keep"

A Yale study found that the brain is more likely to remember images that are difficult to interpret, using a computational model to show that scenes hard to reconstruct are more memorable. This insight could help develop more efficient AI memory systems.

via Neuroscience News|

#ai #computational-model #memory