iScience, Journal Year: 2024, Volume and Issue: 27(12), P. 111481 - 111481
Published: Nov. 26, 2024
Language: Английский
Consciousness and Cognition, Journal Year: 2024, Volume and Issue: 120, P. 103679 - 103679
Published: April 1, 2024
Aphantasia is a condition that often characterized as the impaired ability to create voluntary mental images. assumed selectively affect imagery mainly because even though aphantasics report being unable visualize something at will, many having visual dreams. We argue this common characterization of aphantasia incorrect. Studies on are not clear about whether they assessing or involuntary imagery, but some studies show several forms also affected in (including dreams). raise problems for two attempts images preserved aphantasia. In addition, we results study afterimages aphantasia, which suggest these tend be less intense than controls. Involuntary treated unitary kind either present absent approach mistaken and should look different types case by case. Doing so reveals no evidence broader deficit forming not, more appropriate. Characterizing volitional likely lead researchers give incorrect explanations wrong mechanisms underlying it.
Language: Английский
Citations
12
Cortex, Journal Year: 2025, Volume and Issue: 185, P. 113 - 132
Published: Feb. 20, 2025
Language: Английский
Citations
1
Journal of Neuroscience Methods, Journal Year: 2024, Volume and Issue: 406, P. 110128 - 110128
Published: March 28, 2024
Language: Английский
Citations
6
bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown
Published: June 14, 2023
Abstract Most of us effortlessly describe visual objects, whether seen or remembered. Yet, around 4% people report congenital aphantasia: they struggle to visualize objects despite being able their appearance. What neural mechanisms create this disparity between subjective experience and objective performance? Aphantasia can provide novel insights into conscious processing awareness. We used ultra-high field 7T fMRI establish the circuits involved in mental imagery perception, elucidate associated with internally generated information absence aphantasia. Ten typical imagers 10 aphantasic individuals performed perceptual tasks five domains: object shape, color, written words, faces, spatial relationships. In imagers, activated left-hemisphere frontoparietal areas, relevant domain-preferring areas ventral temporal cortex partly overlapping a domain-general area left fusiform gyrus (the Fusiform Imagery Node). The results were valid for each individual participant. individuals, similar but there was reduced functional connectivity Node areas. Our unveil domain-specific imagery, disorganization aphantasia, support general hypothesis that - perceived imagined depends on integrated activity high-level networks.
Language: Английский
Citations
15
Physics of Life Reviews, Journal Year: 2024, Volume and Issue: 49, P. 10 - 11
Published: Feb. 28, 2024
Language: Английский
Citations
5
NeuroImage, Journal Year: 2025, Volume and Issue: unknown, P. 121171 - 121171
Published: March 1, 2025
The coordination of different brain regions is required for the visual imagery complex objects (e.g., faces and places). Short-range connectivity within sensory areas necessary to construct mental image. Long-range between control re-instantiate maintain While dynamic changes in functional are expected during imagery, it unclear whether a category-specific network exists which strength spatial destination connections vary depending on target. In this magnetoencephalography study, we used minimally constrained experimental paradigm wherein categories were prompted using word cues only, decoded face versus place based their underlying patterns as estimated from covariance across regions. A subnetwork analysis further disentangled contribution connections. results show that can be both short-range long-range Overall, imagined object distinguished observed network. Notably, estimates rely purely endogenous signals suggesting an external reference not elicit such dynamics.
Language: Английский
Citations
0
Journal of Cognitive Psychology, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 13
Published: April 3, 2025
Language: Английский
Citations
0
Neuroscience of Consciousness, Journal Year: 2025, Volume and Issue: 2025(1)
Published: Jan. 1, 2025
Abstract Visual imagery is a dynamic process recruiting network of brain regions. We used electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) fusion to investigate the dynamics category selective in medial parietal cortex (MPC), ventral temporal (VTC), primary visual (V1). Subjects attended separate EEG fMRI sessions where they created mental images personally familiar people place stimuli. The contrast comparing replicated previous findings category-selectivity cortex. In addition, greater activity for places was found lateral memory areas, frontal eye fields, inferior sulcus, intraparietal sulcus. contrast, fusiform face area right posterior superior Using multivariate decoding analysis fMRI, we could decode individual stimuli within preferred VTC. A more complex pattern emerged MPC, which represented information that not restricted category. were also able data. EEG–fMRI indicated similar timings MPC VTC during imagery. However, VTC, higher regions an early time window, later window. correlations V1 occurred period, possibly reflecting top-down progression from category-selective
Language: Английский
Citations
0
bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown
Published: March 5, 2024
Abstract Vividness of visual imagery is subject to individual variability, a phenomenon with largely unexplored neurobiological underpinnings. By analyzing data from 273 participants we explored the link between structural-functional organization brain connectomes and reported intensity (measured VVIQ-2). Employing graph theory analyses investigated both structural (DTI) functional (rs-fMRI) within network regions often implicated in imagery. Our results indicate relationship increased local efficiency clustering coefficients connectome individuals who experience more vivid Increased were mirrored increases left inferior temporal regions, region frequently identified as critical hub literature. Furthermore, found have lower levels global their connectome. We propose that clarity are optimized by characterized heightened localized information transfer interconnectedness. Conversely, an excessively globally integrated might dilute specific neural activity crucial for generating images, leading less locally concentrated resource allocation key involved vividness.
Language: Английский
Citations
3
Physics of Life Reviews, Journal Year: 2024, Volume and Issue: 49, P. 74 - 76
Published: March 24, 2024
Language: Английский
Citations
2