Spatial imagery relies on a sensory independent, though sensory sensitive, functional organization within the parietal cortex: A fMRI study of angle discrimination in sighted and congenitally blind individuals

Bonino, Daniela; Ricciardi, Emiliano; Bernardi, Giulio; Sani, Lorenzo; Gentili, Claudio; Vecchi, Tomaso; Pietrini, Pietro

doi:10.1016/j.neuropsychologia.2015.01.004

Cited by 26 publications

(24 citation statements)

References 54 publications

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“…Nonetheless, since the occipital increases in beta and gamma were bilateral and symmetric, we hypothesize that they could be due also to a supramodal representation of the sensory and imaginative context, independent from the specific sensory modality (Bonino et al, 2015;Papale, Chiesi, Rampinini, Pietrini, & Ricciardi, 2016).…”

Section: Discussionmentioning

confidence: 89%

“…A contribution of the occipital region, may be due to cross‐modal sensory activation (Heimler, Striem‐Amit, & Amedi, ) which has been observed in several experimental protocols such as sighted adults who recruit the ventral visual cortex during tactile Braille reading (Bola et al., ) and, for the auditory modality, congenitally deaf subjects showing activation of the auditory cortex during tactile stimulation (Levänen, Jousmäki, & Hari, ; Poirier et al., ). Nonetheless, since the occipital increases in beta and gamma were bilateral and symmetric, we hypothesize that they could be due also to a supramodal representation of the sensory and imaginative context, independent from the specific sensory modality (Bonino et al., ; Papale, Chiesi, Rampinini, Pietrini, & Ricciardi, ).…”

Section: Discussionmentioning

confidence: 90%

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Spectral and topological analyses of the cortical representation of the head position: Does hypnotizability matter?

et al. 2019

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Introduction The aim of this exploratory study was to assess the EEG correlates of head positions (which have never been studied in humans) in participants with different psychophysiological characteristics, as encoded by their hypnotizability scores. This choice is motivated by earlier studies suggesting different processing of vestibular/neck proprioceptive information in subjects with high (highs) and low (lows) hypnotizability scores maintaining their head rotated toward one side ( RH ). Methods We analyzed EEG signals recorded in 20 highs and 19 lows in basal conditions (head forward) and during RH using spectral analysis, which captures changes localized to specific recording sites, and topological data analysis ( TDA ), which instead describes large‐scale differences in processing and representing sensorimotor information. Results Spectral analysis revealed significant differences related to head position for alpha 1, beta 2, beta 3, and gamma bands, but not to hypnotizability. TDA instead revealed global hypnotizability‐related differences in the strengths of the correlations among recording sites during RH . Significant changes were observed in lows on the left parieto‐occipital side and in highs in right frontoparietal region. Significant differences between the two groups were found in the occipital region, where changes were larger in lows than in highs . Conclusions This study reports finding of the EEG correlates of changes in the head posture for the first time, indicating that hypnotizability is related to the head posture representation/processing on large‐scale networks and that spectral and topological data analyses provide complementary results.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 90%

Spectral and topological analyses of the cortical representation of the head position: Does hypnotizability matter?

et al. 2019

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“…A recent study directly comparing language laterality between blind and sighted individuals showed reduced laterality throughout frontotemporal language areas as well as in occipital cortices recruited for language processing in early blind individuals (Lane et al, 2017). Finally, in the spatial domain, the right hemisphere seems to be dominant in spatial metric tasks in the blind as well (Cattaneo, Fantino, Tinti, Silvanto, & Vecchi, 2010; Cattaneo, Fantino, Silvanto, Tinti, & Vecchi, 2011; Cattaneo Fantino, Tinti, et al, 2011; Sampaio, Gouarir, & Mvondo, 1995), although there is evidence that blindness affects the degree of lateralization in spatial imagery tasks (Bonino et al, 2015) and functional motor-spatial asymmetries (Nava et al, 2013). …”

Section: Discussionmentioning

confidence: 99%

Emotion processing in early blind and sighted individuals.

Gamond

Vecchi²,

Ferrari

et al. 2017

Neuropsychology

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Objective Emotion processing is known to be mediated by a complex network of cortical and subcortical regions with evidence of specialized hemispheric lateralization within the brain. In light of prior evidence indicating that lateralization of cognitive functions (such as language) may depend on normal visual development, we investigated whether the lack of prior visual experience would have an impact on the development of specialized hemispheric lateralization in emotional processing. Method We addressed this issue by comparing performance in early blind and sighted controls on a dichotic listening task requiring the detection of specific emotional vocalizations (i.e., suggestive of happiness or sadness) presented independently to either ear. Results Consistent with previous studies, we found that sighted individuals showed enhanced detection of positive vocalizations when presented in the right ear (i.e., processed within the left hemisphere) and negative vocalizations when presented in the left ear (i.e., right hemisphere). It is interesting to note that although blind individuals were as accurate as sighted controls in detecting the valance of the vocalization, performance was not consistent with any pattern of specialized hemispheric lateralization. Conclusions Overall, these results suggest that although the lack of prior visual experience may not lead to impaired emotion processing performance, the underlying neurophysiological substrate (i.e., degree of special hemispheric lateralization) may depend on normal visual development.

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“…A contribution of the occipital region may be due to cross-modal sensory activation [Heimler et al, 2015] which has been observed in several experi-mental protocols such as sighted adults who recruit the ventral visual cortex during tactile Braille reading [Bola et al, 2016] and, for the auditory modality, congenitally deaf subjects showing activation of the auditory cortex during tactile stimulation [Levänen et al, 1998, Poirier et al, 2005. Nonetheless, since the occipital increases in beta and gamma were bilateral and symmetric, we hypothesize that they could be due also to a supra-modal representation of the sensory context, independent from the specific sensory modality [Bonino et al, 2015, Papale et al, 2016. The other process that is the sensory-motor representation of the rotated head could have its correlates in the asymmetric increases in beta2, beta3 and gamma power in the medio-anterior region [Turella et al, 2016, van Ede et al, 2014.…”

Section: Discussionmentioning

confidence: 76%

Spectral and topological analysis of the cortical representation of the head position: does hypnotizability matter?

Ibáñez‐Marcelo

Campioni

Manzoni

et al. 2018

Preprint

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The aim of the study was to assess the EEG correlates of head positions, which have never been studied in humans, in participants with different psychophysiological characteristics, as encoded by their hypnotizability scores. This choice is motivated by earlier studies suggesting different processing of the vestibular/neck proprioceptive information in subjects with high (highs) and low (lows) hypnotizability scores maintaining their head rotated toward one side (RH). We analysed EEG signals recorded in 20 highs and 19 lows in basal conditions (head forward) and during RH, using spectral analysis, which captures changes localized to specific recording sites, and Topological Data Analysis (TDA), which instead describes largescale differences in processing and representing sensorimotor information. Spectral analysis revealed significant differences related to the head position for alpha1, beta2, beta3, gamma bands, but not to hypnotizability. TDA instead revealed global hypnotizability-related differences in the strengths of the correlations among recording sites during RH. Significant changes were observed in lows on the left parieto-occipital side and in highs in right fronto-parietal region. Significant differences between the two groups were found in the occipital region, where changes were larger in lows than in highs. The study reports findings of the EEG correlates of the head posture for the first time, indicates that hypnotizability modulates its representation/processing on large-scale and that spectral and topological data analysis provide complementary results.

show abstract

Spatial imagery relies on a sensory independent, though sensory sensitive, functional organization within the parietal cortex: A fMRI study of angle discrimination in sighted and congenitally blind individuals

Cited by 26 publications

References 54 publications

Spectral and topological analyses of the cortical representation of the head position: Does hypnotizability matter?

Spectral and topological analyses of the cortical representation of the head position: Does hypnotizability matter?

Emotion processing in early blind and sighted individuals.

Spectral and topological analysis of the cortical representation of the head position: does hypnotizability matter?

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