Mirror-invariance is not exclusively visual but extends to touch DOI Creative Commons
Maksymilian Korczyk, Katarzyna Rączy, Marcin Szwed

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Dec. 28, 2024

Mirror-invariance enables recognition of mirrored objects as identical. During reading acquisition, sighted readers must overcome this innate bias to distinguish between mirror-inverted letters ('d' vs. 'b'). Congenitally blind individuals seem mirror-invariance for Braille letters, too. Here, we investigated across modalities and its modulation based on the objects' familiarity. subjects participated in same-different judgment tasks using tactile (blind blindfolded subjects) visual (sighted modalities. Stimuli included pairs (Braille Latin) familiar non-linguistic stimuli: geometric figures everyday objects, presented identical ('p'/'p'), mirror ('p'/'q'), different ('p'/'z') conditions. In modality, no group differences were found shape stimuli. orientation-based task, higher expertise haptic rather than was observed group. Sighted participants exhibit difficulties when judging Latin those orientation (signature breaking invariance), comparison blind, who had Results suggest that is modality-independent.

Language: Английский

Dissecting abstract, modality-specific and experience-dependent coding of affect in the human brain DOI Creative Commons
Giada Lettieri, Giacomo Handjaras, Elisa Morgana Cappello

et al.

Science Advances, Journal Year: 2024, Volume and Issue: 10(10)

Published: March 8, 2024

Emotion and perception are tightly intertwined, as affective experiences often arise from the appraisal of sensory information. Nonetheless, whether brain encodes emotional instances using a sensory-specific code or in more abstract manner is unclear. Here, we answer this question by measuring association between emotion ratings collected during unisensory multisensory presentation full-length movie activity recorded typically developed, congenitally blind deaf participants. Emotional encoded vast network encompassing sensory, prefrontal, temporal cortices. Within network, ventromedial prefrontal cortex stores categorical representation independent modality previous experience, posterior superior maps valence dimension an code. Sensory experience than affects how organizes information outside supramodal regions, suggesting existence scaffold for states where inputs development shape its functioning.

Language: Английский

Citations

8
Abnormal Alterations of the White Matter Structural Network in Patients with Herpes Zoster and Postherpetic Neuralgia DOI
Zihan Li, Lili Gu,

Xiaofeng Jiang

et al.

Brain Topography, Journal Year: 2025, Volume and Issue: 38(2)

Published: Feb. 6, 2025

Language: Английский

Citations

0
Semantic representations in the visual cortex of blind and sighted humans DOI Open Access

Małgorzata Paczyńska,

Marta Urbaniak,

Marta Dębecka

et al.

Published: April 17, 2025

In blind humans, the “visual” cortex responds to linguistic stimuli, such as words and sentences. This is sometimes taken evidence that this brain region supports starkly different computations in sighted individuals. Here, we challenge view show that, during word processing, visual areas these two populations represent same semantic dimension – knowledge about physical properties of referents. Using analysis fMRI activation patterns, found both congenitally participants represented differences between individual words. groups, patterns for reflected physical, but not conceptual similarity Furthermore, between-group correlations were comparable within-group correlations. Finally, groups showed greatest “representational connectivity” occipitotemporal areas. Overall, our findings suggest responses stimuli individuals are driven by representational mechanisms functional also adult brain. individuals, information referents might be backprojected areas, from cortex, support predictions, imagery, visuospatial thinking. mechanism preserved and, combined with increased excitability drive strong stimuli.

Language: Английский

Citations

0
Semantic representations in the visual cortex of blind and sighted humans DOI Open Access

Małgorzata Paczyńska,

Marta Urbaniak,

Marta Dębecka

et al.

Published: April 17, 2025

In blind humans, the “visual” cortex responds to linguistic stimuli, such as words and sentences. This is sometimes taken evidence that this brain region supports starkly different computations in sighted individuals. Here, we challenge view show that, during word processing, visual areas these two populations represent same semantic dimension – knowledge about physical properties of referents. Using analysis fMRI activation patterns, found both congenitally participants represented differences between individual words. groups, patterns for reflected physical, but not conceptual similarity Furthermore, between-group correlations were comparable within-group correlations. Finally, groups showed greatest “representational connectivity” occipitotemporal areas. Overall, our findings suggest responses stimuli individuals are driven by representational mechanisms functional also adult brain. individuals, information referents might be backprojected areas, from cortex, support predictions, imagery, visuospatial thinking. mechanism preserved and, combined with increased excitability drive strong stimuli.

Language: Английский

Citations

0
Vision matters for shape representation: Evidence from sculpturing and drawing in the blind DOI
Shuang Tian,

Lingjuan Chen,

Xiaoying Wang

et al.

Cortex, Journal Year: 2024, Volume and Issue: 174, P. 241 - 255

Published: March 19, 2024

Language: Английский

Citations

1
Two brain systems for the perception of geometric shapes DOI Creative Commons
Mathias Sablé-Meyer, Lucas Benjamin, Cassandra Potier Watkins

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: March 14, 2024

The perception and production of regular geometric shapes is a characteristic trait human cultures since prehistory, whose neural mechanisms are unknown. Behavioral studies suggest that humans attuned to discrete regularities such as symmetries parallelism, rely on their combinations encode in compressed form. To identify the relevant brain systems dynamics, we collected functional MRI magnetoencephalography data both adults six-year-olds during simple hexagons, triangles quadrilaterals. results revealed shapes, relative other visual categories, induce hypoactivation ventral areas an overactivation intraparietal inferior temporal regions also involved mathematical processing, activation modulated by regularity. While convolutional networks captured early activity evoked they failed account for subsequent dorsal parietal prefrontal signals, which could only be features or more advanced transformer models vision. We propose abstract engages additional symbolic mode perception.

Language: Английский

Citations

0
Widespread neural reorganization related to expertise in reading visual Braille DOI Creative Commons
Filippo Cerpelloni, Alice Van Audenhaege, Jacek Matuszewski

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: May 8, 2024

Abstract Shape processing is crucial for visual object understanding. Visual reading seems to be attuned it, as most scripts share similar features like line junctions and shape cues. Here we investigate the effect of expertise in Braille, a script developed touch that does not typical explicit information other alphabets. We compared Braille readers naïve control group found individually localized Word Form Area (VWFA) was selectively activated when scrambled only expert readers. Multivariate analyses showed linguistic properties can decoded from Latin both groups Yet, cross-scripts generalization failed reveal common representations across experts, suggesting VWFA experts contains interdigitated rather than joint scripts. Primary cortex, shape-selective areas (Lateral Occipital areas, LO), (left Posterior Temporal area, l-PosTemp) multivariate profiles VWFA, but with aligned representation left area only. conclude status script, low-level line-junctions properties, play major role how system, particular, shows preference Significance statement What drives sensitivity cortex written words? show readers, (VWFA), commonly thought integrate into words, responds without Words, regardless presence or absence lines, are processed their content, which happens script-specific manner. Additionally, observe several key regions involved vision (V1, more script-invariant language (l-PosTemp). network specialise

Language: Английский

Citations

0
The Multisensory and Multidimensional Nature of Object Representation. DOI
Hellen Kyler

Journal of Neurophysiology, Journal Year: 2024, Volume and Issue: unknown

Published: June 12, 2024

Recent fMRI experiments revealed similar neural representations across different types of 2D visual stimuli; however, real 3D objects affording action differentially affect activation and behavioral results relative to objects. Recruitment multiple sensory regions during unisensory (visual, haptic, auditory) object shape tasks suggests that representation may be modality invariant. This mini review explores the overlapping involved in representation, 2D, 3D, visual, haptic experiments.

Language: Английский

Citations

0
Mirror-invariance is not exclusively visual but extends to touch DOI Creative Commons
Maksymilian Korczyk, Katarzyna Rączy, Marcin Szwed

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Dec. 28, 2024

Mirror-invariance enables recognition of mirrored objects as identical. During reading acquisition, sighted readers must overcome this innate bias to distinguish between mirror-inverted letters ('d' vs. 'b'). Congenitally blind individuals seem mirror-invariance for Braille letters, too. Here, we investigated across modalities and its modulation based on the objects' familiarity. subjects participated in same-different judgment tasks using tactile (blind blindfolded subjects) visual (sighted modalities. Stimuli included pairs (Braille Latin) familiar non-linguistic stimuli: geometric figures everyday objects, presented identical ('p'/'p'), mirror ('p'/'q'), different ('p'/'z') conditions. In modality, no group differences were found shape stimuli. orientation-based task, higher expertise haptic rather than was observed group. Sighted participants exhibit difficulties when judging Latin those orientation (signature breaking invariance), comparison blind, who had Results suggest that is modality-independent.

Language: Английский

Citations

0