H.Henrik Ehrsson

H.Henrik Ehrsson
Karolinska Institutet | KI · Department of Neuroscience

MD, PhD

About

203
Publications
49,687
Reads
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16,069
Citations
Citations since 2016
95 Research Items
9513 Citations
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201620172018201920202021202205001,0001,500
201620172018201920202021202205001,0001,500

Publications

Publications (203)
Article
Full-text available
Previous studies have shown that illusory ownership over a mannequin’s body can be induced through synchronous visuo-tactile stimulation as well as through synchronous visuo-vestibular stimulation. The current study aimed to elucidate how three-way combinations of correlated visual, tactile and vestibular signals contribute to the senses of body ow...
Poster
The sense of owning one’s body arises from the integration of multiple sensory signals. Is this sense prioritised by awareness in that it enters awareness as soon as it is sensorily processed? To induce and manipulate body ownership, researchers typically use the rubber hand illusion (RHI), which involves stroking a person’s hand (hidden behind a s...
Article
Touch is perceived most pleasant when delivered at velocities known to optimally activate the C-Tactile afferent system. At the group level, pleasantness ratings of touch delivered at velocities in the range between 0.3 and 30 cm/s follows an inverted-U shape curve, with maximum pleasantness between 1 and 10 cm/s. However, the prevalence, reliabili...
Preprint
Full-text available
In the rubber hand illusion, touches are applied to a fake hand at the same time as touches are applied to a participant’s real hand that is hidden in a congruent position. Synchronous (but not asynchronous) tactile stimulation of the two hands may induce the sensation that the fake hand is the participant’s own. As such, the illusion is commonly u...
Preprint
Full-text available
Enhanced tactile acuity in blindness is among the most widely reported results of neuroplasticity following prolonged visual deprivation. However, tactile submodalities other than discriminative touch are profoundly understudied in blind individuals. Here, we examined the influence of blindness on two tactile submodalities, affective and discrimina...
Article
Full-text available
Many studies have investigated the contributions of vision, touch, and proprioception to body ownership, i.e., the multisensory perception of limbs and body parts as our own. However, the computational processes and principles that determine subjectively experienced body ownership remain unclear. To address this issue, we developed a detection-like...
Preprint
Full-text available
Bodily illusions have fascinated humankind for centuries, and researchers have studied them to learn about the perceptual and neural processes that underpin multisensory channels of bodily awareness. The influential rubber hand illusion (RHI) has been used to study changes in the sense of body ownership: how a limb is perceived to belong to one's b...
Article
In the past 2 decades, interoception has received increasing attention in the fields of psychology and cognitive science, as well as neuroscience and physiology. A plethora of studies adopted the perception of cardiac signals as a proxy for interoception. However, recent findings have cast doubt on the methodological and intrinsic validity of the t...
Preprint
Body ownership and the sense of agency are two central aspects of bodily self-consciousness. While multiple neuroimaging studies have investigated the neural correlates of body ownership and agency in isolation, few have investigated their relationship during voluntary movement when such experiences naturally combine. By eliciting the moving rubber...
Article
Full-text available
Thermosensation has been redefined as an interoceptive modality that provides information about the homeostatic state of the body. However, the contribution of thermosensory signals to the sense of body ownership remains unclear. Across two rubber hand illusion (RHI) experiments (N = 73), we manipulated the visuo-thermal congruency between the felt...
Article
Full-text available
Some recent papers by P. Lush and colleagues have argued that the rubber hand illusion (RHI), where participants can feel a rubber hand as their own under appropriate multisensory stimulation, may be caused mainly by hypnotic suggestibility and expectations (demand characteristics). These papers rely primarily on a study with 353 participants who t...
Poster
The sense of ownership of one’s body arises from the integration of multiple sensory signals. Researchers typically employ bodily illusions like the rubber hand illusion (RHI) to study body ownership. The RHI involves stroking a person’s hand (hidden behind a screen) alongside a visible fake rubber hand placed in front of them; this induces the fee...
Article
Interoception includes signals from inner organs and thin afferents in the skin, providing information about the body’s physiological state. However, the functional relationships between interoceptive submodalities are unclear, and thermosensation as skin-based interoception has rarely been considered. We used five tasks to examine the relationship...
Preprint
Full-text available
Touch is perceived most pleasant when delivered at velocities known to optimally activate C Tactile afferents. At the group level, pleasantness ratings of touch delivered at velocities in the range 0.3-30 cm/s follows an inverted-U shape curve, with maximum pleasantness between 1 and 10 cm/s. However, the prevalence, reliability, and stability of t...
Preprint
Full-text available
In the past two decades, interoception has received increasing attention in the fields of psychology and cognitive science, as well as neuroscience and physiology. A plethora of studies adopted the perception of cardiac signals as a proxy for interoception. However, recent findings have cast doubt to the methodological and intrinsic validity of the...
Article
Full-text available
In recent decades, research on somatosensory perception has led to two important observations. First, self-generated touches that are predicted by voluntary movements become attenuated compared to externally generated touches of the same intensity (attenuation). Second, externally generated touches feel weaker and are more difficult to detect durin...
Preprint
Full-text available
In the present study, we investigated the effect of short-term visual deprivation on discriminative touch, cardiac interoception, and thermosensation by asking 64 healthy volunteers to perform four behavioral tasks. The experimental group contained 32 subjects who were blindfolded and kept in complete darkness for 110 minutes, while the control gro...
Article
Full-text available
The rubber hand illusion is a perceptual illusion in which participants experience an inanimate rubber hand as their own when they observe this model hand being stroked in synchrony with strokes applied to the person’s real hand, which is hidden. Earlier studies have focused on the factors that determine the elicitation of this illusion, the relati...
Article
Full-text available
In the present study, we investigated the effect of short-term visual deprivation on discriminative touch, cardiac interoception, and thermosensation by asking 64 healthy volunteers to perform four behavioral tasks. The experimental group contained 32 subjects who were blindfolded and kept in complete darkness for 110 minutes, while the control gro...
Article
Full-text available
Sigmund Freud famously noted some memories are recalled with a perspective of “an observer from outside the scene”. According to Freud—and most memory researchers today—the third-person perspective occurs due to reconstructive processes at recall. An alternative possibility is that the third-person perspective have been adopted when the actual even...
Article
Full-text available
Body ownership refers to the distinct sensation that our observed body belongs to us, which is believed to stem from multisensory integration. This is commonly shown through the rubber hand illusion (RHI), which induces a sense of ownership over a false limb. Whilst the RHI may interfere with object-directed action and alter motor cortical activity...
Article
Full-text available
The discovery of mirror neurons in the macaque brain in the 1990s triggered investigations on putative human mirror neurons and their potential functionality. The leading proposed function has been action understanding: accordingly, we understand the actions of others by ‘simulating’ them in our own motor system through a direct matching of the vis...
Article
We aimed at investigating the contribution of sensory predictions triggered by the sight of an object moving towards the body for the sense of body ownership. We used a recently developed psychophysical discrimination task to assess body ownership in the rubber hand illusion. In this task, the participants had to choose which of the two right rubbe...
Preprint
The rubber hand illusion is a perceptual illusion in which participants experience an inanimate rubber hand as their own when they observe this model hand being stroked in synchrony with strokes applied to the person’s real hand, which is hidden. Earlier studies have focused on the factors that determine the elicitation of this illusion, the relati...
Preprint
Many studies have investigated the contributions of vision, touch, and proprioception to body ownership, i.e., the multisensory perception of limbs and body parts as our own. However, the computational processes and principles that determine subjectively experienced body ownership remain unclear. To address this issue, we developed a detection-like...
Preprint
Full-text available
Interoception, i.e., the perception of the physiological status of the body, includes signals originating both from inside the body and from its surface, the skin. Here, we focused on the perception of temperature, a crucial modality for the maintenance of homeostasis. We used a classic thermal detection task and developed a new thermal matching ta...
Article
Full-text available
The rubber hand illusion (RHI) is one of the most commonly used paradigms to examine the sense of body ownership. Touches are synchronously applied to the real hand, hidden from view, and a false hand in an anatomically congruent position. During the illusion one may perceive that the feeling of touch arises from the false hand (referral of touch),...
Preprint
Full-text available
The discovery of mirror neurons in the macaque brain in the 1990s triggered investigations on putative human mirror neurons and their potential functionality. The leading proposed function has been action understanding: accordingly, we understand the actions of others by simulating them in our own motor system through a direct matching of the visua...
Article
Full-text available
The full-body ownership illusion exploits multisensory perception to induce a feeling of ownership of an entire artificial body. Although previous research has shown that synchronous visuotactile stimulation of a single body part is sufficient for illusory ownership of the whole body, the effect of combining multisensory stimulation across multiple...
Article
Full-text available
Previous research has shown that it is possible to use multisensory stimulation to induce the perceptual illusion of owning supernumerary limbs, such as two right arms. However, it remains unclear whether the coherent feeling of owning a full-body may be duplicated in the same manner and whether such a dual full-body illusion could be used to split...
Article
Full-text available
During self-induced pain, a copy of the motor information from the body's own movement may help predict the painful sensation and cause down-regulation of pain. This phenomenon, called sensory attenuation, enables the distinction between self-produced stimuli versus stimuli produced by others. Sensory attenuation has been shown to occur also during...
Preprint
Full-text available
In recent decades, research on somatosensory perception has led to two important observations. First, self-generated touches that are predicted by voluntary movements become attenuated compared to externally generated touches of the same intensity (attenuation). Second, externally generated touches feel weaker and are more difficult to detect durin...
Preprint
Full-text available
In recent decades, research on somatosensory perception has led to two important observations. First, self-generated touches that are predicted by voluntary movements become attenuated compared to externally generated touches of the same intensity (attenuation). Second, externally generated touches feel weaker and are more difficult to detect durin...
Article
Full-text available
Gender identity is a collection of thoughts and feelings about one’s own gender, which may or may not correspond to the sex assigned at birth. How this sense is linked to the perception of one’s own masculine or feminine body remains unclear. Here, in a series of three behavioral experiments conducted on a large group of control volunteers (N = 140...
Article
Full-text available
The experience of one’s body as one’s own is referred to as the sense of body ownership. This central part of human conscious experience determines the boundary between the self and the external environment, a crucial distinction in perception, action, and cognition. Although body ownership is known to involve the integration of signals from multip...
Article
Full-text available
How does our body affect the way we think about our personality? We addressed this question by eliciting the perceptual illusion that pairs of friends swapped bodies with each other. We found that during the illusion, the participants rated their own personality characteristics more similarly to the way they previously rated their friend's personal...
Preprint
The experience of one's body as one's own is referred to as the sense of body ownership. This central part of human conscious experience determines the boundary between the self and the external environment, a crucial distinction in perception, action, and cognition. Although body ownership is known to involve the integration of signals from multip...
Preprint
Full-text available
The full-body ownership illusion exploits multisensory perception to induce a feeling of ownership for an entire artificial body. Whilst previous research has shown that the synchronous visuotactile stimulation of a single body part is sufficient for illusory ownership over the whole body, the effect of combining multisensory stimulation across mul...
Article
Full-text available
Since the early 1970s, numerous behavioral studies have shown that self-generated touch feels less intense than the same touch applied externally. Computational motor control theories have suggested that cerebellar internal models predict the somatosensory consequences of our movements and that these predictions attenuate the perception of the actu...
Preprint
Full-text available
Body ownership refers to the distinct sensation that our observed body belongs to us, which is believed to stem from multisensory integration. The rubber hand illusion (RHI) provides the most well-known evidence for this proposal: synchronous (but not asynchronous) stroking of a fake hand and a participant’s real hidden hand can induce a sense of o...
Article
Full-text available
Self-generated touch feels less intense than external touch of the same intensity. According to theory, this is because the brain predicts and attenuates the somatosensory consequences of our movements using a copy of the motor command, i.e., the efference copy. However, whether the efference copy is necessary for this somatosensory attenuation is...
Preprint
Full-text available
Gender identity is the inner sense of being male, female, both, or neither. How this sense is linked to the perception of one's own masculine or feminine body remains unclear. Here, in a series of three behavioral experiments conducted on a large group of healthy volunteers (N=140), we show that a perceptual illusion of having the opposite-sex body...
Chapter
Body ownership refers to the perceptual experience of a body or body part as one’s own. Integration of signals from different sensory modalities is considered to play a central role in the emergence of this fundamental experience. This chapter reviews behavioral and neuroimaging studies that have investigated the multisensory processes and neural m...
Article
Full-text available
Self-generated touch feels less intense and less ticklish than identical externally generated touch. This somatosensory attenuation occurs because the brain predicts the tactile consequences of our self-generated movements. To produce attenuation, the tactile predictions need to be time-locked to the movement, but how the brain maintains this tempo...
Preprint
Since the early 1970s, numerous behavioral studies have shown that self-generated touch feels less intense than the same touch applied externally. Computational motor control theories have suggested that cerebellar internal models predict the somatosensory consequences of our movements and that these predictions attenuate the perception of the actu...
Preprint
Full-text available
A self-generated touch feels less intense than an external touch of the exact same intensity. According to a prevalent computational theory of motor control, this attenuation occurs because the brain uses internal forward models to predict the somatosensory consequences of our movements using a copy of the motor command, i.e., the efference copy. T...
Article
Full-text available
When we perform a movement we generally have a clear distinction between which parts of the world constitute our body and which parts do not. However, how the sense of ownership over our body supports movement is not yet fully understood. We aimed to see whether a sense of ownership over the hand supports the performance of rapid hand movements. In...
Preprint
Full-text available
Self-generated touch feels less intense and less ticklish than identical externally generated touch. This somatosensory attenuation occurs because the brain predicts the tactile consequences of our self-generated movements. To produce attenuation, the tactile predictions need to be time-locked to the movement, but how the brain maintains this tempo...
Article
Full-text available
Can the mere expectation of a sensory event being about to occur on an artificial limb be sufficient to elicit an illusory sense of ownership over said limb? This issue is currently under debate and studies using two different paradigms have presented conflicting results. Here, we employed the two relevant paradigms, namely, the magnetic touch illu...
Data
Raw data. Questionnaire, threat-evoked SCR, and continuous skin conductance and subjective ratings data. (XLSX)
Data
Questionnaire results for the original rubber hand and magnetic touch illusions. See Table 1 for statements. The error bars denote the SEM. (PDF)
Data
Motion tracking results for the knife threat event. The sensor was attached to the experimenter’s hand that held the knife and made a ‘cutting’ motion by sliding the knife over the rubber hand. The rubber hand’s surface is indicated with black-colored data points. In the right panel, a series of five sequential images illustrating the entire threat...
Preprint
When we perform a movement we generally have a clear distinction between which parts of the world constitute our body, and which parts do not. However, how the sense of ownership over our body supports movement generation is not yet fully understood. We aimed to see whether a sense of ownership over the hand supports the performance of rapid hand m...
Article
Vestibular signals allow us to maintain balance and orient ourselves in space. However, the possible contribution of the vestibular sense to the perception of the body as one’s own (body ownership) remains poorly understood. The aim of the present study was to investigate how vestibular information contributes to the experience of body ownership us...
Article
Full-text available
Over the past decade, numerous neuroimaging studies based on hemodynamic markers of brain activity have examined the feeling of body ownership using perceptual body-illusions in humans. However, the direct electrophysiological correlates of body ownership at the cortical level remain unexplored. To address this, we studied the rubber hand illusion...
Article
Full-text available
Self-orientation perception is a necessary ability for everyday life that heavily depends on visual and vestibular information. To perceive the orientation of oneself with respect to the external environment would seem to first require that one has a clear sense of one’s own body (‘sense of body ownership’). However, the experimental evidence for t...
Article
Full-text available
The perception of one’s own body depends on the dynamic integration of signals from different sensory modalities. Earlier studies have shown that visual, tactile, and proprioceptive information contributes to this process. However, little is known about the role of auditory cues in the multisensory integration of bodily signals. To address this iss...
Article
Full-text available
Dissatisfaction with one’s body is a widespread issue in modern society and has been linked to vulnerability for developing eating disorders. Recent studies have demonstrated a direct relationship between body perception and body satisfaction by manipulating perceived body size using multisensory body illusions. However, how these body size illusio...
Data
Additional correlations. Spearman’s Rho and Pearson correlations for additional variables in experiment two: Sync vs Async = change in IAT d score for synchronous minus asynchronous trails (across body sizes). (DOCX)
Data
Illusion questionnaire. Medians (IQR) of Illusion Questionnaire items for experiments one and two. (DOCX)
Data
Implicit association task. Words used for the Implicit Association Task in experiment two. (DOCX)
Data
Spreadsheet for main results. Spreadsheets of main results for experiments one and two. (XLSX)
Data
Eating disorder examination questionnaire scores. Global and subscale medians (IQR) for the eating disorder examination questionnaire in experiments one and two. (DOCX)
Data
Additional correlations Exp 1. Spearman’s Rho correlations for additional variables in experiment one. (DOCX)
Data
Supplementary results. Additional results for questionnaire items in experiments one and two. (DOCX)