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Page 1
Subtitled speech: the neural mechanisms of ticker-tape synaesthesia.
Hauw F, Béranger B, Cohen L. Hauw F, et al. Brain. 2024 Jul 5;147(7):2530-2541. doi: 10.1093/brain/awae114. Brain. 2024. PMID: 38620012 Free PMC article.
Furthermore, the regions over-activated in ticker-tape synaesthesia overlap with regions under-activated in dyslexia. Third, during the resting state (i.e. in the absence of current ticker-tape synaesthesia), synaesthetes showed increased functional connectivity …
Furthermore, the regions over-activated in ticker-tape synaesthesia overlap with regions under-activated in dyslexia. Third, during t …
"Mickey Mousing" in the Brain: Motion-Sound Synesthesia and the Subcortical Substrate of Audio-Visual Integration.
Laeng B, Flaaten CB, Walle KM, Hochkeppler A, Specht K. Laeng B, et al. Front Hum Neurosci. 2021 Feb 15;15:605166. doi: 10.3389/fnhum.2021.605166. eCollection 2021. Front Hum Neurosci. 2021. PMID: 33658913 Free PMC article.
In addition, functional magnetic resonance imaging data showed activity in motion-sensitive regions, as well as temporal and occipital areas, and the cerebellum. ...The present findings underline the importance of considering the role of subcortical systems a …
In addition, functional magnetic resonance imaging data showed activity in motion-sensitive regions, as well as tempora …
A case of co-occuring synesthesia, autism, prodigious talent and strong structural brain connectivity.
Riedel A, Maier S, Wenzler K, Feige B, Tebartz van Elst L, Bölte S, Neufeld J. Riedel A, et al. BMC Psychiatry. 2020 Jun 30;20(1):342. doi: 10.1186/s12888-020-02722-w. BMC Psychiatry. 2020. PMID: 32605557 Free PMC article.
We investigated the young man's structural brain connectivity in comparison to adults with or without ASD, applying global fiber tracking to diffusion-weighted Magnetic Resonance Imaging (MRI) data. ...Additionally, this case impressively illust …
We investigated the young man's structural brain connectivity in comparison to adults with or without ASD, applying global fiber trac …
Magnetic resonance imaging does not reveal structural alterations in the brain of grapheme-color synesthetes.
Dojat M, Pizzagalli F, Hupé JM. Dojat M, et al. PLoS One. 2018 Apr 4;13(4):e0194422. doi: 10.1371/journal.pone.0194422. eCollection 2018. PLoS One. 2018. PMID: 29617401 Free PMC article.
Several publications have reported structural changes in the brain of synesthetes compared to controls, either local differences or differences in connectivity. In the present study, we pursued this quest for structural brain differences that might support the subjective e …
Several publications have reported structural changes in the brain of synesthetes compared to controls, either local differences or differen …
Top-down signal transmission and global hyperconnectivity in auditory-visual synesthesia: Evidence from a functional EEG resting-state study.
Brauchli C, Elmer S, Rogenmoser L, Burkhard A, Jäncke L. Brauchli C, et al. Hum Brain Mapp. 2018 Jan;39(1):522-531. doi: 10.1002/hbm.23861. Epub 2017 Oct 31. Hum Brain Mapp. 2018. PMID: 29086468 Free PMC article.
Auditory-visual (AV) synesthesia is a rare phenomenon in which an auditory stimulus induces a "concurrent" color sensation. ...Furthermore, AV synesthetes were characterized by increased top-down signal transmission from the superior parietal lobe to the left color process …
Auditory-visual (AV) synesthesia is a rare phenomenon in which an auditory stimulus induces a "concurrent" color sensation. ...Furthe …
Neuroanatomy of pain-deficiency and cross-modal activation in calcium channel subunit (CACN) α2δ3 knockout mice.
Landmann J, Richter F, Oros-Peusquens AM, Shah NJ, Classen J, Neely GG, Richter A, Penninger JM, Bechmann I. Landmann J, et al. Brain Struct Funct. 2018 Jan;223(1):111-130. doi: 10.1007/s00429-017-1473-4. Epub 2017 Jul 21. Brain Struct Funct. 2018. PMID: 28733833
Compared to wild-type mice, axonal processes in somatosensory cortex were enhanced, and dendritic processes reduced, in CACNalpha2delta3 KO mice. Immunohistochemical and MRI analyses, investigating morphology, thalamocortical and intra-/intercortical trajectories, revealed …
Compared to wild-type mice, axonal processes in somatosensory cortex were enhanced, and dendritic processes reduced, in CACNalpha2delta3 KO …
Creating Colored Letters: Familial Markers of Grapheme-Color Synesthesia in Parietal Lobe Activation and Structure.
Colizoli O, Murre JMJ, Scholte HS, Rouw R. Colizoli O, et al. J Cogn Neurosci. 2017 Jul;29(7):1239-1252. doi: 10.1162/jocn_a_01105. Epub 2017 Feb 14. J Cogn Neurosci. 2017. PMID: 28195520
It is unknown why some people develop synesthesia and others do not. In the current study, we tested whether neural markers related to having synesthesia in the family were evident in brain function and structure. Relatives of synesthetes (who did not have any type …
It is unknown why some people develop synesthesia and others do not. In the current study, we tested whether neural markers related t …
Social responsiveness to inanimate entities: Altered white matter in a 'social synaesthesia'.
Simner J, Rehme MK, Carmichael DA, Bastin ME, Sprooten E, McIntosh AM, Lawrie SM, Zedler M. Simner J, et al. Neuropsychologia. 2016 Oct;91:282-289. doi: 10.1016/j.neuropsychologia.2016.08.020. Epub 2016 Aug 20. Neuropsychologia. 2016. PMID: 27553270 Free article.
Participants with this 'Ordinal Linguistic Personification' (Simner and Hubbard, 2006) which we describe here as a form of social synaesthesia, showed lower fractional anisotropy (FA) values in five clusters at whole-brain significance, compared with non-synaesthetes (in t …
Participants with this 'Ordinal Linguistic Personification' (Simner and Hubbard, 2006) which we describe here as a form of social synaest …
Hypothesis concerning embodied calendars: A case study of number form, color spreading, and taste-color synaesthesia.
Ramachandran VS, Chunharas C, Marcus Z. Ramachandran VS, et al. Med Hypotheses. 2016 Sep;94:58-62. doi: 10.1016/j.mehy.2016.06.021. Epub 2016 Jun 25. Med Hypotheses. 2016. PMID: 27515202
We postulate that the human calendar is mediated by connections between the angular gyrus and hippocampal place and time cells-via the inferior longitudinal fasciculus. Other aspects of EA's synaesthesia were also explored. The colors evoked by graphemes spread outs …
We postulate that the human calendar is mediated by connections between the angular gyrus and hippocampal place and time cells-via th …
A critical review of the neuroimaging literature on synesthesia.
Hupé JM, Dojat M. Hupé JM, et al. Front Hum Neurosci. 2015 Mar 31;9:103. doi: 10.3389/fnhum.2015.00103. eCollection 2015. Front Hum Neurosci. 2015. PMID: 25873873 Free PMC article. Review.
Here, we review all the studies (based mostly on functional and structural magnetic resonance imaging) that have searched for the neural correlates of this subjective experience, as well as structural differences related to synesthesia. ...Rather than …
Here, we review all the studies (based mostly on functional and structural magnetic resonance imaging) that have search …
Neural networks of colored sequence synesthesia.
Tomson SN, Narayan M, Allen GI, Eagleman DM. Tomson SN, et al. J Neurosci. 2013 Aug 28;33(35):14098-106. doi: 10.1523/JNEUROSCI.5131-12.2013. J Neurosci. 2013. PMID: 23986245 Free PMC article.
Previous studies have characterized synesthesia using resting-state connectivity or stimulus-driven analyses, but it remains unclear how network properties change as synesthetes move from one condition to another. ...We then explored functional connectivity o …
Previous studies have characterized synesthesia using resting-state connectivity or stimulus-driven analyses, but it remains u …
Pathways to seeing music: enhanced structural connectivity in colored-music synesthesia.
Zamm A, Schlaug G, Eagleman DM, Loui P. Zamm A, et al. Neuroimage. 2013 Jul 1;74:359-66. doi: 10.1016/j.neuroimage.2013.02.024. Epub 2013 Feb 21. Neuroimage. 2013. PMID: 23454047 Free PMC article.
In the current study we investigated the white matter correlates of colored-music synesthesia. As these synesthetes report seeing colors upon hearing musical sounds, we hypothesized that they might show unique patterns of connectivity between visual and auditory ass …
In the current study we investigated the white matter correlates of colored-music synesthesia. As these synesthetes report seeing col …
Inside a synesthete's head: a functional connectivity analysis with grapheme-color synesthetes.
Sinke C, Neufeld J, Emrich HM, Dillo W, Bleich S, Zedler M, Szycik GR. Sinke C, et al. Neuropsychologia. 2012 Dec;50(14):3363-9. doi: 10.1016/j.neuropsychologia.2012.09.015. Epub 2012 Sep 18. Neuropsychologia. 2012. PMID: 23000109
Grapheme-color synesthesia is a condition in which letters are perceived with an additional color dimension. To identify brain regions involved in this type of synesthesia and to analyze functional connectivity of these areas, 18 grapheme-color synesthetes an …
Grapheme-color synesthesia is a condition in which letters are perceived with an additional color dimension. To identify brain region …
A neural link between feeling and hearing.
Ro T, Ellmore TM, Beauchamp MS. Ro T, et al. Cereb Cortex. 2013 Jul;23(7):1724-30. doi: 10.1093/cercor/bhs166. Epub 2012 Jun 12. Cereb Cortex. 2013. PMID: 22693344 Free PMC article.
Here, we provide evidence that the neural substrates for audition and somatosensation are anatomically linked. Using diffusion tensor imaging with both deterministic and probabilistic tractography to measure white matter connectivity, we show that there are extensiv …
Here, we provide evidence that the neural substrates for audition and somatosensation are anatomically linked. Using diffusion tensor ima …
Intrinsic network connectivity reflects consistency of synesthetic experiences.
Dovern A, Fink GR, Fromme AC, Wohlschläger AM, Weiss PH, Riedl V. Dovern A, et al. J Neurosci. 2012 May 30;32(22):7614-21. doi: 10.1523/JNEUROSCI.5401-11.2012. J Neurosci. 2012. PMID: 22649240 Free PMC article.
Consistent with the notion that synesthesia results from hyperconnectivity, functional connectivity analysis (adopting independent component analysis and seed-based correlation analysis) of resting-state functional magnetic resonance imaging dat …
Consistent with the notion that synesthesia results from hyperconnectivity, functional connectivity analysis (adopting indepen …
Disinhibited feedback as a cause of synesthesia: evidence from a functional connectivity study on auditory-visual synesthetes.
Neufeld J, Sinke C, Zedler M, Dillo W, Emrich HM, Bleich S, Szycik GR. Neufeld J, et al. Neuropsychologia. 2012 Jun;50(7):1471-7. doi: 10.1016/j.neuropsychologia.2012.02.032. Epub 2012 Mar 6. Neuropsychologia. 2012. PMID: 22414594
In synesthesia, certain stimuli to one sensory modality lead to sensory perception in another unstimulated modality. ...This latter hypothesis is compatible with the disinhibited feedback model, which suggests unusual feedback from multimodal convergence areas as the cause …
In synesthesia, certain stimuli to one sensory modality lead to sensory perception in another unstimulated modality. ...This latter h …
Effective connectivity determines the nature of subjective experience in grapheme-color synesthesia.
van Leeuwen TM, den Ouden HE, Hagoort P. van Leeuwen TM, et al. J Neurosci. 2011 Jul 6;31(27):9879-84. doi: 10.1523/JNEUROSCI.0569-11.2011. J Neurosci. 2011. PMID: 21734279 Free PMC article.
In grapheme-color synesthesia, written letters induce color sensations, accompanied by activation of color area V4. ...Our findings reconcile the two most influential cross-activation accounts of synesthesia....
In grapheme-color synesthesia, written letters induce color sensations, accompanied by activation of color area V4. ...Our findings r …
Globally altered structural brain network topology in grapheme-color synesthesia.
Hänggi J, Wotruba D, Jäncke L. Hänggi J, et al. J Neurosci. 2011 Apr 13;31(15):5816-28. doi: 10.1523/JNEUROSCI.0964-10.2011. J Neurosci. 2011. PMID: 21490223 Free PMC article.
Recently published studies did not confirm such a hyperconnectivity, although morphometric alterations were found in occipitotemporal, parietal, and frontal regions of synesthetes. We used magnetic resonance imaging surface-based morphometry and graph-theoret …
Recently published studies did not confirm such a hyperconnectivity, although morphometric alterations were found in occipitotemporal, parie …
The neuroanatomy of grapheme-color synesthesia.
Jäncke L, Beeli G, Eulig C, Hänggi J. Jäncke L, et al. Eur J Neurosci. 2009 Mar;29(6):1287-93. doi: 10.1111/j.1460-9568.2009.06673.x. Eur J Neurosci. 2009. PMID: 19302164
In addition, we set out to analyze structural connectivity based on fractional anisotropy (FA) measurements in a subsample of 28 subjects (14 synesthetes and 14 control subjects). ...The observed altered brain anatomy in grapheme-color synesthetes might be the anatomical b …
In addition, we set out to analyze structural connectivity based on fractional anisotropy (FA) measurements in a subsample of 28 subj …
Is undiagnosed synaesthesia a confounding factor in the interpretation of MRI images?
Zayed N, Goodyear B, Smith M. Zayed N, et al. Annu Int Conf IEEE Eng Med Biol Soc. 2008;2008:5778-81. doi: 10.1109/IEMBS.2008.4650527. Annu Int Conf IEEE Eng Med Biol Soc. 2008. PMID: 19164030
Given the numerous anatomical and functional connections within the brain, it is possible that undiagnosed synaesthesia may influence the results of functional magnetic resonance imaging (fMRI) studies or even structural MRI. In this pape …
Given the numerous anatomical and functional connections within the brain, it is possible that undiagnosed synaesthesia may in …
Neural substrates of sound-touch synesthesia after a thalamic lesion.
Beauchamp MS, Ro T. Beauchamp MS, et al. J Neurosci. 2008 Dec 10;28(50):13696-702. doi: 10.1523/JNEUROSCI.3872-08.2008. J Neurosci. 2008. PMID: 19074042 Free PMC article.
Neural plasticity induced by stroke can mediate positive outcomes, such as recovery of function, but can also result in the formation of abnormal connections with negative consequences for perception and cognition. In three experiments using blood-oxygen level dependent (B …
Neural plasticity induced by stroke can mediate positive outcomes, such as recovery of function, but can also result in the formation of abn …
Grapheme-colour synaesthetes show increased grey matter volumes of parietal and fusiform cortex.
Weiss PH, Fink GR. Weiss PH, et al. Brain. 2009 Jan;132(Pt 1):65-70. doi: 10.1093/brain/awn304. Epub 2008 Nov 21. Brain. 2009. PMID: 19028762
In synaesthesia, stimulation of a sensory modality triggers abnormal additional perceptions. ...More specifically, we tested the hypothesis that in synaesthesia altered connectivity in temporo-occipital and parietal areas may be associated with grey matter (G …
In synaesthesia, stimulation of a sensory modality triggers abnormal additional perceptions. ...More specifically, we tested the hypo …
The multiple synaesthete E.S.: neuroanatomical basis of interval-taste and tone-colour synaesthesia.
Hänggi J, Beeli G, Oechslin MS, Jäncke L. Hänggi J, et al. Neuroimage. 2008 Nov 1;43(2):192-203. doi: 10.1016/j.neuroimage.2008.07.018. Epub 2008 Jul 22. Neuroimage. 2008. PMID: 18692578
One of the current theories of synaesthesia proposes that local crossactivation or disinhibition of feedback occurs because of increased connectivity between relevant brain areas. Based on diffusion tensor and T1-weighted magnetic resonance imaging …
One of the current theories of synaesthesia proposes that local crossactivation or disinhibition of feedback occurs because of increa …
Feeling sounds after a thalamic lesion.
Ro T, Farnè A, Johnson RM, Wedeen V, Chu Z, Wang ZJ, Hunter JV, Beauchamp MS. Ro T, et al. Ann Neurol. 2007 Nov;62(5):433-41. doi: 10.1002/ana.21219. Ann Neurol. 2007. PMID: 17893864
We show that the human VL also plays a prominent role in sensory processing. METHODS: Structural magnetic resonance imaging and diffusion tensor imaging were used to localize a small lesion restricted to the right VL in a patient with contralesional se …
We show that the human VL also plays a prominent role in sensory processing. METHODS: Structural magnetic resonance imaging …
Increased structural connectivity in grapheme-color synesthesia.
Rouw R, Scholte HS. Rouw R, et al. Nat Neurosci. 2007 Jun;10(6):792-7. doi: 10.1038/nn1906. Epub 2007 May 21. Nat Neurosci. 2007. PMID: 17515901
Diffusion tensor imaging allowed us to validate for the first time the hypothesis that hyperconnectivity causes the added sensations in synesthesia. ...In contrast, greater connectivity (as compared with non-synesthetes) in the superior parietal or frontal co …
Diffusion tensor imaging allowed us to validate for the first time the hypothesis that hyperconnectivity causes the added sensations …
Activation of striate cortex in the absence of visual stimulation: an fMRI study of synesthesia.
Aleman A, Rutten GJ, Sitskoorn MM, Dautzenberg G, Ramsey NF. Aleman A, et al. Neuroreport. 2001 Sep 17;12(13):2827-30. doi: 10.1097/00001756-200109170-00015. Neuroreport. 2001. PMID: 11588585
It has been suggested that internally generated visual perception involves the primary visual cortex V1. To test this hypothesis, a functional MRI study was conducted with a female subject with orthographic color-word synesthesia. ...This finding provides evidence f …
It has been suggested that internally generated visual perception involves the primary visual cortex V1. To test this hypothesis, a function …