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Mirror-Touch Synesthesia

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Mirror-Touch Synesthesia is a neurological condition in which individuals experience tactile sensations on their own bodies when observing others being touched. This phenomenon is linked to heightened empathy and is thought to arise from atypical neural connections between sensory and emotional processing areas in the brain.
lightbulbAbout this topic
Mirror-Touch Synesthesia is a neurological condition in which individuals experience tactile sensations on their own bodies when observing others being touched. This phenomenon is linked to heightened empathy and is thought to arise from atypical neural connections between sensory and emotional processing areas in the brain.

Key research themes

1. How does the brain process and embody social-affective touch, and what roles do mirror mechanisms and C-tactile afferents play in vicarious tactile perception?

This research area investigates the neurophysiological and neurocognitive mechanisms underlying the perception of touch both when felt directly and vicariously (observed touch), emphasizing the social and affective dimensions mediated by specialized afferents (C-tactile fibers) and mirror neuron system components. Understanding these processes illuminates how humans connect affectively, how tactile mirroring occurs in mirror-touch synesthesia, and the role of multisensory integration in social cognition.

Key finding: This work establishes that slow-conducted unmyelinated C-tactile (CT) fibers encode affiliative, pleasant touch via a central 'social brain' network centered on the posterior insular cortex; critically, CT-related touch... Read more
Key finding: This comprehensive review integrates behavioral and neuroimaging findings showing that vicarious tactile perception (mirror touch) engages a mirror-touch system involving primary and secondary somatosensory cortices and... Read more
Key finding: This empirical study found that mirror-touch synesthesia (MTS) occurs across cultures and is quantitatively elevated in a Chinese sample relative to Western samples, with vicarious tactile experiences largely specific to... Read more
Key finding: Using stereo-EEG recordings, this study empirically demonstrates that the secondary somatosensory cortex (SII) activates bilaterally with matching temporal dynamics during both execution and observation of complex hand... Read more

2. What multisensory and sensorimotor factors influence the perception and embodiment of touch in mirror illusions and tool use, and how do these phenomena inform our understanding of tactile body representation?

This theme encompasses research exploring how visual, proprioceptive, and tactile signals integrate to create illusions of touch and tool embodiment, revealing how top-down and multisensory processes modulate body representation and tactile perception. Investigations use mirror illusions and visual-tactile conflicts to study body ownership and the recalibration of tactile sensation, providing insights relevant for explaining vicarious touch experiences and mechanisms of mirror-touch synesthesia.

Key finding: This study reports the “phantom touch illusion” (PTI), where participants in immersive virtual reality experienced illusory tingling sensations when touching their virtual hand with a virtual object despite no physical... Read more
Key finding: Employing a mirror visual illusion that isolated visual feedback from proprioceptive and kinesthetic inputs, this study revealed that illusory visual tool use—without active movement—elicited recalibration of tactile... Read more
Key finding: This investigation demonstrates that the kinesthetic mirror illusion—typically induced by visual feedback of a moving limb reflected in a mirror—persists even when the mirrored arm is no longer visible, implicating bilateral... Read more
Key finding: Through inducing illusory hand rotations by tactile stimulation (scrolling textured disks) combined with proprioceptive muscle vibration, this study showed that tactile cues can independently elicit hand movement illusions... Read more

3. To what extent do bilateral and multisensory representations in the somatosensory cortex support tactile perception and mirror-touch experiences?

This research theme focuses on the spatial and temporal dynamics of tactile processing in the brain, particularly how unilateral and bilateral tactile afferents are represented and integrated in primary (SI) and secondary (SII) somatosensory cortices. These studies explore how these cortical areas encode both direct and observed touch, their mirror-like responses, and how such neural substrates facilitate the embodied mirroring characteristic of mirror-touch synesthesia.

Key finding: Challenging classical views that primary somatosensory cortex (SI) processes exclusively contralateral touch, this review summarises neurophysiological and imaging evidence showing that SI exhibits bilateral tactile... Read more
Key finding: Utilizing stereotactic EEG recordings in humans, this study found that secondary somatosensory cortex (SII) exhibits bilateral gamma-band activation with identical temporal profiles during both action execution and... Read more
Key finding: This electrocorticography study delineates the spatial and temporal dynamics of the human mirror neuron system (hMNS), revealing distinct neuronal populations in sensorimotor, frontal, and parietal cortices that respond... Read more
Key finding: By projecting complex mid-air tactile motion stimuli onto the palm using ultrasound, this study shows that whole-hand tactile motion perception exhibits directional biases analogous to the visual oblique effect, revealing... Read more

All papers in Mirror-Touch Synesthesia

Tendo como objeto de investigação científica a sinestesiologia -termo criado para definir, neste trabalho de pesquisa, o estudo da sinestesia, sob um enfoque semiótico e pragmático -e como principal suporte teórico a semiótica peirceana,... more
Tendo como objeto de investigacao cientifica a sinestesiologia - termo criado para definir, neste trabalho de pesquisa, o estudo da sinestesia, sob um enfoque semiotico e pragmatico - e como principal suporte teorico a semiotica... more
The role of empathy and perspective-taking in preventing aggressive behaviors has been highlighted in several theoretical models. In this study, we used immersive virtual reality to induce a full body ownership illusion that allows... more
Resumo Duchamp descreve o inframince2 como “o mais ínfimo dos intervalos, ou a mínima das diferenças” (DUCHAMP apud PERLOFF, 2002, p. 101). Tomando o trabalho e a proposição de Duchamp no sentido de que o inframince não pode ser descrito... more
In this study we present an experiment investigating the reconfiguration process elicited by the task switching paradigm in synesthesia. We study the time course of the operations involved in the activation of photisms. In the... more
In this study we present an experiment investigating the reconfiguration process elicited by the task switching paradigm in synesthesia. We study the time course of the operations involved in the activation of photisms. In the... more
Touch is our most interpersonal sense, and so it stands to reason that we represent not only our own bodily experiences, but also those felt by others. This review will summarise brain and behavioural research on vicarious tactile... more
Mentalizing is a fundamental process underpinning human social interaction. Claims of the existence of ‘implicit mentalizing’ represent a fundamental shift in our understanding of this important skill, suggesting that preverbal infants... more
This a translation I made of a Massumi's paper for Galáxia (PUCSP) Resumo: Os neurônios-espelho são neurônios especializados, capazes de ecoar no corpo de alguém movimentos percebidos no corpo de outra pessoa, através de algo que se... more
In this study we present an experiment investigating the reconfiguration process elicited by the task switching paradigm in synesthesia. We study the time course of the operations involved in the activation of photisms. In the... more
Individuals with mirror touch synaesthesia (MTS) experience touch on their own body when observing others being touched. A recent account proposes that such rare experiences could be linked to impairment in self-other representations.... more
Individuals with mirror touch synaesthesia (MTS) experience touch on their own body when observing others being touched. A recent account proposes that such rare experiences could be linked to impairment in self-other representations.... more
by Mj Dcs
In this study we present an experiment investigating the reconfiguration process elicited by the task switching paradigm in synaesthesia. We study the time course of the operations involved in the activation of photisms. In the... more
Through cross-modal architectural portraits we investigate how the fabric of the city can change from a hollow, disembodied shell to one that defies stereotyping, as it constantly morphs and modulates to the inner pulse of the city’s... more
In this study we present an experiment investigating the reconfiguration process elicited by the task switching paradigm in synesthesia. We study the time course of the operations involved in the activation of photisms. In the... more
In this study we present an experiment investigating the reconfiguration process elicited by the task switching paradigm in synesthesia. We study the time course of the operations involved in the activation of photisms. In the... more
This paper aims to consider the impact of progress in the neurosciences, in particular the discovery of mirror neurons, on the study of morality. It analyzes the current attempts at naturalizing moral principles based on this discovery,... more
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