Academic literature on the topic 'Body illusion, body localisation, body perception, tactile processing'

The bodily self is constructed from multisensory information. However, little is known of the relationship between multisensory development and the emerging sense of self. We investigated how multisensory processes underpin the developing sense of bodily self by measuring the strength of the ‘Rubber Hand Illusion’ in young children (4 to 9 years old) and adults. Stroking mode (synchronous vs asynchronous) was varied between subjects. Following this visuotactile stimulation, we measured processes of body localisation using intermanual pointing, and feelings of body ownership using questionnaire responses. Intermanual pointing showed that children were as sensitive as adults to visual-tactile synchrony cues for hand position. Similarly, explicit feelings of embodiment, measured by questionnaire items, were sensitive to visual-tactile integration independent of age. These converging results indicate a visual-tactile pathway to the bodily self which matures by at least 4 years of age. However, regardless of synchrony cues, children’s pointing was more captured by the fake hand than adults, indicating a second, later-maturing process based on visual-proprioceptive information. These findings demonstrate two dissociable processes underlying body representation in early life: an early-maturing visual tactile process controlling hand localisation and ownership, and a later-developing visual-proprioceptive process controlling localisation only. The findings further suggest that hand localisation and ownership may not always be so intimately bound together as adult data would suggest, and therefore call for a reassessment of the systems involved in adult own-body perception.

We constantly feel, see and move our body, and have no doubt that it is our own, distinct from the body of other people. At the same time, understanding other people’s feelings in social interactions depends on the ability to map onto one’s own body the observed experiences on the bodies of others. It has been shown that the more similar others are perceived to be to our self, the stronger this mapping is. While previous studies have focused on existing similarities or differences between self and other, we ask whether the experimental change of the self-other boundaries can lead to changes in somatosensory processing. It has been shown that the perception of tactile stimuli on the face is enhanced if participants concurrently observe a face being touched. This Visual Remapping of Touch (VRT; Ladavas and Serino, 2010) is enhanced the more similar others are perceived to be to the self, and is strongest when viewing one’s face (Serino et al., 2008, 2009). We used the enfacement illusion that relies on synchronous interpersonal multisensory stimulation (IMS; Sforza et al., 2010; Tsakiris, 2008) to manipulate self-other boundaries. Following synchronous, but not asynchronous IMS, the self-related enhancement of the VRT effect was extended to the other individual. These findings suggest that shared multi-sensory experiences represent one key way in which the boundaries and perceived similarity between self and others can be overcome, as evidenced by changes in somatosensory processing of shared tactile stimuli.

The rubber hand illusion (RHI) paradigm experimentally produces an illusion of rubber hand ownership and arm shift by simultaneously stroking a rubber hand in view and a participant’s visually occluded hand. It involves visual, tactile, and proprioceptive multisensory integration and activates multisensory areas in the brain, including the posterior parietal cortex (PPC). Multisensory inputs are transformed into outputs for motor control in association areas such as PPC. A behavioral study reported decreased motor performance after RHI. However, it remains unclear whether RHI modifies the interactions between sensory and motor systems and between PPC and the primary motor cortex (M1). We used transcranial magnetic stimulation (TMS) and examined the functional connections from the primary somatosensory and association cortices to M1 and from PPC to M1 during RHI. In experiment 1, short-latency afferent inhibition (SAI) and long-latency afferent inhibition (LAI) were measured before and immediately after a synchronous (RHI) or an asynchronous (control) condition. In experiment 2, PPC-M1 interaction was measured using two coils. We found that SAI and LAI were reduced in the synchronous condition compared with baseline, suggesting that RHI decreased somatosensory processing in the primary sensory and the association cortices projecting to M1. We also found that greater inhibitory PPC-M1 interaction was associated with stronger RHI assessed by questionnaire. Our findings suggest that RHI modulates both the early and late stages of processing of tactile afferent, which leads to altered M1 excitability by reducing the gain of somatosensory afferents to resolve conflicts among multisensory inputs. NEW & NOTEWORTHY Perception of one’s own body parts involves integrating different sensory information and is important for motor control. We found decreased effects of cutaneous stimulation on motor cortical excitability during rubber hand illusion (RHI), which may reflect decreased gain of tactile input to resolve multisensory conflicts. RHI strength correlated with the degree of inhibitory posterior parietal cortex-motor cortex interaction, indicating that parietal-motor connection is involved in resolving sensory conflicts and body ownership during RHI.

It has been claimed that individuals with schizophrenia have difficulty in self-recognition and, consequently, are unable to identify the sources of their sensory perceptions or thoughts, resulting in delusions, hallucinations, and unusual experiences of body ownership. The deficits also contribute to the enhanced rubber hand illusion (RHI; a body perception illusion, induced by synchronous visual and tactile stimulation). Evidence based on RHI paradigms is emerging that auditory information can make an impact on the sense of body ownership, which relies on the process of multisensory inputs and integration. Hence, we assumed that auditory verbal hallucinations (AVHs), as an abnormal auditory perception, could be linked with body ownership, and the RHI paradigm could be conducted in patients with AVHs to explore the underlying mechanisms. In this study, we investigated the performance of patients with/without AVHs in the RHI. We administered the RHI paradigm to 80 patients with schizophrenia (47 with AVHs and 33 without AVHs) and 36 healthy controls. We conducted the experiment under two conditions (synchronous and asynchronous) and evaluated the RHI effects by both objective and subjective measures. Both patient groups experienced the RHI more quickly and strongly than HCs. The RHI effects of patients with AVHs were significantly smaller than those of patients without AVHs. Another important finding was that patients with AVHs did not show a reduction in RHI under asynchronous conditions. These results emphasize the disturbances of the sense of body ownership in schizophrenia patients with/without AVHs and the associations with AVHs. Furthermore, it is suggested that patients with AVHs may have multisensory processing dysfunctions and internal timing deficits.

There is, in our sense of place, little cognisance of what lies underground. Yet our sense of place, instinctive, unconscious, primeval, has its own underground: the secret spaces which mirror our insides; the world beneath the skin. Our roots lie beneath the ground, with the minerals and the dead. (Hughes 83) The-Home-and-Away-Game Imagine the earth-grounded, “diagrammatological” trajectory of a footballer who as one member of a team is psyching himself up before the start of a game. The siren blasts its trumpet call. The footballer bursts out of the pavilion (where this psyching up has taken place) to engage in the opening bounce or kick of the game. And then: running, leaping, limping after injury, marking, sliding, kicking, and possibly even passing out from concussion. Finally, the elation accompanying the final siren, after which hugs, handshakes and raised fists conclude the actual match on the football oval. This exit from the pavilion, the course the player takes during the game itself, and return to the pavilion, forms a combination of stasis and movement, and a return to exhausted stasis again, that every player engages with regardless of the game code. Examined from a “diagrammatological” perspective, a perspective Rowan Wilken (following in the path of Gilles Deleuze and W. J. T. Mitchell) understands as “a generative process: a ‘metaphor’ or way of thinking — diagrammatic, diagrammatological thinking — which in turn, is linked to poetic thinking” (48), this footballer’s scenario arises out of an aerial perspective that depicts the actual spatial trajectory the player takes during the course of a game. It is a diagram that is digitally encoded via a sensor on the footballer’s body, and being an electronically encoded diagram it can also make available multiple sets of data such as speed, heartbeat, blood pressure, maybe even brain-wave patterns. From this limited point of view there is only one footballer’s playing trajectory to consider; various groupings within the team, the whole team itself, and the diagrammatological depiction of its games with various other teams might also be possible. This singular imagining though is itself an actuality: as a diagram it is encoded as a graphic image by a satellite hovering around the earth with a Global Positioning System (GPS) reading the sensor attached to the footballer which then digitally encodes this diagrammatological trajectory for appraisal later by the player, coach, team and management. In one respect, this practice is another example of a willing self-surveillance critical to explaining the reflexive subject and its attribute of continuous self-improvement. According to Docker, Official Magazine of the Fremantle Football Club, this is a technique the club uses as a part of game/play assessment, a system that can provide a “running map” for each player equipped with such a tracking device during a game. As the Fremantle Club’s Strength and Conditioning Coach Ben Tarbox says of this tactic, “We’re getting a physiological profile that has started to build a really good picture of how individual players react during a game” (21). With a little extra effort (and some sizeable computer processing grunt) this two dimensional linear graphic diagram of a footballer working the football ground could also form the raw material for a three-dimensional animation, maybe a virtual reality game, even a hologram. It could also be used to sideline a non-performing player. Now try another related but different imagining: what if this diagrammatological trajectory could be enlarged a little to include the possibility that this same player’s movements could be mapped out by the idea of home-and-away games; say over the course of a season, maybe even a whole career, for instance? No doubt, a wide range of differing diagrammatological perspectives might suggest themselves. My own particular refinement of this movement/stasis on the footballer’s part suggests my own distinctive comings and goings to and from my own specific piece of home country. And in this incessantly domestic/real world reciprocity, in this diurnally repetitive leaving and coming back to home country, might it be plausible to think of “Home as Capital of the Region”? If, as Walter Benjamin suggests in the prelude to his monumental Arcades Project, “Paris — the Capital of the Nineteenth Century,” could it be that both in and through my comings and goings to and from this selfsame home country, my own burgeoning sense of regionality is constituted in every minute-by-minutiae of lived experience? Could it be that this feeling about home is manifested in my every day-to-night manoeuvre of home-and-away-and-away-and-home-making, of every singular instance of exit, play/engage, and the return home? “Home, Capital of the Region” then examines the idea that my home is that part of the country which is the still-point of eternal return, the bedrock to which I retreat after the daily grind, and the point from which I start out and do it all again the next day. It employs, firstly, this ‘diagrammatological’ perspective to illustrate the point that this stasis/movement across country can make an electronic record of my own psychic self-surveillance and actualisation in-situ. And secondly, the architectural plan of the domestic home (examined through the perspective of critical regionalism) is used as a conduit to illustrate how I am physically embedded in country. Lastly, intermingling these digressive threads is chora, Plato’s notion of embodied place and itself an ancient regional rendering of this eternal return to the beginning, the place where the essential diversity of country decisively enters the soul. Chora: Core of Regionality Kevin Lynch writes that, “Our senses are local, while our experience is regional” (10), a combination that suggests this regional emphasis on home-and-away-making might be a useful frame of reference (simultaneously spatiotemporal, both a visceral and encoded communication) for me to include as a crucial vector in my own life-long learning package. Regionality (as, variously, a sub-generic categorisation and an extension/concentration of nationality, as well as a recently re-emerged friend/antagonist to a global understanding) infuses my world of home with a grounded footing in country, one that is a site of an Eternal Return to the Beginning in the micro-world of the everyday. This is a point John Sallis discusses at length in his analysis of Plato’s Timaeus and its founding notion of regionality: chora. More extended absences away from home-base are of course possible but one’s return to home on most days and for most nights is a given of post/modern, maybe even of ancient everyday experience. Even for the continually shifting nomad, nightfall in some part of the country brings the rest and recreation necessary for the next day’s wanderings. This fundamental question of an Eternal Return to the Beginning arises as a crucial element of the method in Plato’s Timaeus, a seemingly “unstructured” mythic/scientific dialogue about the origins and structure of both the psychically and the physically implaced world. In the Timaeus, “incoherence is especially obvious in the way the natural sequence in which a narrative would usually unfold is interrupted by regressions, corrections, repetitions, and abrupt new beginnings” (Gadamer 160). Right in the middle of the Timaeus, in between its sections on the “Work of Reason” and the “Work of Necessity”, sits chora, both an actual spatial and bodily site where my being intersects with my becoming, and where my lived life criss-crosses the various arts necessary to articulating a recorded version of that life. Every home is a grounded chora-logical timespace harness guiding its occupant’s thoughts, feelings and actions. My own regionally implaced chora (an example of which is the diagrammatological trajectory already outlined above as my various everyday comings and goings, of me acting in and projecting myself into context) could in part be understood as a graphical realisation of the extent of my movements and stationary rests in my own particular timespace trajectory. The shorthand for this process is ‘embedded’. Gregory Ulmer writes of chora that, “While chorography as a term is close to choreography, it duplicates a term that already exists in the discipline of geography, thus establishing a valuable resonance for a rhetoric of invention concerned with the history of ‘place’ in relation to memory” (Heuretics 39, original italics). Chorography is the geographic discipline for the systematic study and analysis of regions. Chora, home, country and regionality thus form an important multi-dimensional zone of interplay in memorialising the game of everyday life. In light of these observations I might even go so far as to suggest that this diagrammatological trajectory (being both digital and GPS originated) is part of the increasingly electrate condition that guides the production of knowledge in any global/regional context. This last point is a contextual connection usefully examined in Alan J. Scott’s Regions and the World Economy: The Coming Shape of Global Production, Competition, and Political Order and Michael Storper’s The Regional World: Territorial Development in a Global Economy. Their analyses explicitly suggest that the symbiosis between globalisation and regionalisation has been gathering pace since at least the end of World War Two and the Bretton Woods agreement. Our emerging understanding of electracy also happens to be Gregory Ulmer’s part-remedy for shifting the ground under the intense debates surrounding il/literacy in the current era (see, in particular, Internet Invention). And, for Tony Bennett, Michael Emmison and John Frow’s analysis of “Australian Everyday Cultures” (“Media Culture and the Home” 57–86), it is within the home that our un.conscious understanding of electronic media is at its most intense, a pattern that emerges in the longer term through receiving telegrams, compiling photo albums, listening to the radio, home- and video-movies, watching the evening news on television, and logging onto the computer in the home-office, media-room or home-studio. These various generalisations (along with this diagrammatological view of my comings and goings to and from the built space of home), all point indiscriminately to a productive confusion surrounding the sedentary and nomadic opposition/conjunction. If natural spaces are constituted in nouns like oceans, forests, plains, grasslands, steppes, deserts, rivers, tidal interstices, farmland etc. (and each categorisation here relies on the others for its existence and demarcation) then built space is often seen as constituting its human sedentary equivalent. For Deleuze and Guatteri (in A Thousand Plateaus, “1227: Treatise on Nomadology — The War Machine”) these natural spaces help instigate a nomadic movement across localities and regions. From a nomadology perspective, these smooth spaces unsettle a scientific, numerical calculation, sometimes even aesthetic demarcation and order. If they are marked at all, it is by heterogenous and differential forces, energised through constantly oscillating intensities. A Thousand Plateaus is careful though not to elevate these smooth nomadic spaces over the more sedentary spaces of culture and power (372–373). Nonetheless, as Edward S. Casey warns, “In their insistence on becoming and movement, however, the authors of A Thousand Plateaus overlook the placial potential of settled dwelling — of […] ‘built places’” (309, original italics). Sedentary, settled dwelling centred on home country may have a crust of easy legibility and order about it but it also formats a locally/regionally specific nomadic quality, a point underscored above in the diagrammatological perspective. The sedentary tendency also emerges once again in relation to home in the architectural drafting of the domestic domicile. The Real Estate Revolution When Captain Cook planted the British flag in the sand at Botany Bay in 1770 and declared the country it spiked as Crown Land and henceforth will come under the ownership of an English sovereign, it was also the moment when white Australia’s current fascination with real estate was conceived. In the wake of this spiking came the intense anxiety over Native Title that surfaced in late twentieth century Australia when claims of Indigenous land grabs would repossess suburban homes. While easily dismissed as hyperbole, a rhetorical gesture intended to arouse this very anxiety, its emergence is nonetheless an indication of the potential for political and psychic unsettling at the heart of the ownership and control of built place, or ‘settled dwelling’ in the Australian context. And here it would be wise to include not just the gridded, architectural quality of home-building and home-making, but also the home as the site of the family romance, another source of unsettling as much as a peaceful calming. Spreading out from the boundaries of the home are the built spaces of fences, bridges, roads, railways, airport terminals (along with their interconnecting pathways), which of course brings us back to the communications infrastructure which have so often followed alongside the development of transport infrastructure. These and other elements represent this conglomerate of built space, possibly the most significant transformation of natural space that humanity has brought about. For the purposes of this meditation though it is the more personal aspect of built space — my home and regional embeddedness, along with their connections into the global electrosphere — that constitutes the primary concern here. For a sedentary, striated space to settle into an unchallenged existence though requires a repression of the highest order, primarily because of the home’s proximity to everyday life, of the latter’s now fading ability to sometimes leave its presuppositions well enough alone. In settled, regionally experienced space, repressions are more difficult to abstract away, they are lived with on a daily basis, which also helps to explain the extra intensity brought to their sometimes-unsettling quality. Inversely, and encased in this globalised electro-spherical ambience, home cannot merely be a place where one dwells within avoiding those presuppositions, I take them with me when I travel and they come back with me from afar. This is a point obliquely reflected in Pico Iyer’s comment that “Australians have so flexible a sense of home, perhaps, that they can make themselves at home anywhere” (185). While our sense of home may well be, according to J. Douglas Porteous, “the territorial core” of our being, when other arrangements of space and knowledge shift it must inevitably do so as well. In these shifts of spatial affiliation (aided and abetted by regionalisation, globalisation and electronic knowledge), the built place of home can no longer be considered exclusively under the illusion of an autonomous sanctuary wholly guaranteed by capitalist property relations, one of the key factors in its attraction. These shifts in the cultural, economic and psychic relation of home to country are important to a sense of local and regional implacement. The “feeling” of autonomy and security involved in home occupation and/or ownership designates a component of this implacement, a point leading to Eric Leed’s comment that, “By the sixteenth century, literacy had become one of the definitive signs — along with the possession of property and a permanent residence — of an independent social status” (53). Globalising and regionalising forces make this feeling of autonomy and security dynamic, shifting the ground of home, work-place practices and citizenship allegiances in the process. Gathering these wide-ranging forces impacting on psychic and built space together is the emergence of critical regionalism as a branch of architectonics, considered here as a theory of domestic architecture. Critical Regionality Critical regionalism emerged out of the collective thinking of Liane Lefaivre and Alexander Tzonis (Tropical Architecture; Critical Regionalism), and as these authors themselves acknowledge, was itself deeply influenced by the work of Lewis Mumford during the first part of the twentieth century when he was arguing against the authority of the international style in architecture, a style epitomised by the Bauhaus movement. It is Kenneth Frampton’s essay, “Towards a Critical Regionalism: Six Points for an Architecture of Resistance” that deliberately takes this question of critical regionalism and makes it a part of a domestic architectonic project. In many ways the ideas critical regionalism espouses can themselves be a microcosm of this concomitantly emerging global/regional polis. With public examples of built-form the power of the centre is on display by virtue of a building’s enormous size and frequently high-cultural aesthetic power. This is a fact restated again and again from the ancient world’s agora to Australia’s own political bunker — its Houses of Parliament in Canberra. While Frampton discusses a range of aspects dealing with the universal/implaced axis across his discussion, it is points five and six that deserve attention from a domestically implaced perspective. Under the sub-heading, “Culture Versus Nature: Topography, Context, Climate, Light and Tectonic Form” is where he writes that, Here again, one touches in concrete terms this fundamental opposition between universal civilization and autochthonous culture. The bulldozing of an irregular topography into a flat site is clearly a technocratic gesture which aspires to a condition of absolute placelessness, whereas the terracing of the same site to receive the stepped form of a building is an engagement in the act of “cultivating” the site. (26, original italics) The “totally flat datum” that the universalising tendency sometimes presupposes is, within the critical regionalist perspective, an erroneous assumption. The “cultivation” of a site for the design of a building illustrates the point that built space emerges out of an interaction between parallel phenomena as they contrast and/or converge in a particular set of timespace co-ordinates. These are phenomena that could include (but are not limited to) geomorphic data like soil and rock formations, seismic activity, inclination and declension; climatic considerations in the form of wind patterns, temperature variations, rainfall patterns, available light and dark, humidity and the like; the building context in relation to the cardinal points of north, south, east, and west, along with their intermediary positions. There are also architectural considerations in the form of available building materials and personnel to consider. The social, psychological and cultural requirements of the building’s prospective in-dwellers are intermingled with all these phenomena. This is not so much a question of where to place the air conditioning system but the actuality of the way the building itself is placed on its site, or indeed if that site should be built on at all. A critical regionalist building practice, then, is autochthonous to the degree that a full consideration of this wide range of in-situ interactions is taken into consideration in the development of its design plan. And given this autochthonous quality of the critical regionalist project, it also suggests that the architectural design plan itself (especially when it utilised in conjunction with CAD and virtual reality simulations), might be the better model for designing electrate-centred projects rather than writing or even the script. The proliferation of ‘McMansions’ across many Australian suburbs during the 1990s (generally, oversized domestic buildings designed in the abstract with little or no thought to the above mentioned elements, on bulldozed sites, with powerful air-conditioning systems, and no verandas or roof eves to speak of) demonstrates the continuing influence of a universal, centralising dogma in the realm of built place. As summer temperatures start to climb into the 40°C range all these air-conditioners start to hum in unison, which in turn raises the susceptibility of the supporting infrastructure to collapse under the weight of an overbearing electrical load. The McMansion is a clear example of a built form that is envisioned more so in a drafting room, a space where the architect is remote-sensing the locational specificities. In this envisioning (driven more by a direct line-of-sight idiom dominant in “flat datum” and economic considerations rather than architectural or experiential ones), the tactile is subordinated, which is the subject of Frampton’s sixth point: It is symptomatic of the priority given to sight that we find it necessary to remind ourselves that the tactile is an important dimension in the perception of built form. One has in mind a whole range of complementary sensory perceptions which are registered by the labile body: the intensity of light, darkness, heat and cold; the feeling of humidity; the aroma of material; the almost palpable presence of masonry as the body senses it own confinement; the momentum of an induced gait and the relative inertia of the body as it traverses the floor; the echoing resonance of our own footfall. (28) The point here is clear: in its wider recognition of, and the foregrounding of my body’s full range of sensate capacities in relation to both natural and built space, the critical regionalist approach to built form spreads its meaning-making capacities across a broader range of knowledge modalities. This tactility is further elaborated in more thoroughly personal ways by Margaret Morse in her illuminating essay, “Home: Smell, Taste, Posture, Gleam”. Paradoxically, this synaesthetic, syncretic approach to bodily meaning-making in a built place, regional milieu intensely concentrates the site-centred locus of everyday life, while simultaneously, the electronic knowledge that increasingly underpins it expands both my body’s and its region’s knowledge-making possibilities into a global gestalt, sometimes even a cosmological one. It is a paradoxical transformation that makes us look anew at social, cultural and political givens, even objective and empirical understandings, especially as they are articulated through national frames of reference. Domestic built space then is a kind of micro-version of the multi-function polis where work, pleasure, family, rest, public display and privacy intermingle. So in both this reduction and expansion in the constitution of domestic home life, one that increasingly represents the location of the production of knowledge, built place represents a concentration of energy that forces us to re-imagine border-making, order, and the dynamic interplay of nomadic movement and sedentary return, a point that echoes Nicolas Rothwell’s comment that “every exile has in it a homecoming” (80). Albeit, this is a knowledge-making milieu with an expanded range of modalities incorporated and expressed through a wide range of bodily intensities not simply cognitive ones. Much of the ambiguous discontent manifested in McMansion style domiciles across many Western countries might be traced to the fact that their occupants have had little or no say in the way those domiciles have been designed and/or constructed. In Heidegger’s terms, they have not thought deeply enough about “dwelling” in that building, although with the advent of the media room the question of whether a “building” securely borders both “dwelling” and “thinking” is now open to question. As anxieties over border-making at all scales intensifies, the complexities and un/sureties of natural and built space take ever greater hold of the psyche, sometimes through the advance of a “high level of critical self-consciousness”, a process Frampton describes as a “double mediation” of world culture and local conditions (21). Nearly all commentators warn of a nostalgic, romantic or a sentimental regionalism, the sum total of which is aimed at privileging the local/regional and is sometimes utilised as a means of excluding the global or universal, sometimes even the national (Berry 67). Critical regionalism is itself a mediating factor between these dispositions, working its methods and practices through my own psyche into the local, the regional, the national and the global, rejecting and/or accepting elements of these domains, as my own specific context, in its multiplicity, demands it. If the politico-economic and cultural dimensions of this global/regional world have tended to undermine the process of border-making across a range of scales, we can see in domestic forms of built place the intense residue of both their continuing importance and an increased dependency on this electro-mediated world. This is especially apparent in those domiciles whose media rooms (with their satellite dishes, telephone lines, computers, television sets, games consuls, and music stereos) are connecting them to it in virtuality if not in reality. Indeed, the thought emerges (once again keeping in mind Eric Leed’s remark on the literate-configured sense of autonomy that is further enhanced by a separate physical address and residence) that the intense importance attached to domestically orientated built place by globally/regionally orientated peoples will figure as possibly the most viable means via which this sense of autonomy will transfer to electronic forms of knowledge. If, however, this here domestic habitué turns his gaze away from the screen that transports me into this global/regional milieu and I focus my attention on the physicality of the building in which I dwell, I once again stand in the presence of another beginning. This other beginning is framed diagrammatologically by the building’s architectural plans (usually conceived in either an in-situ, autochthonous, or a universal manner), and is a graphical conception that anchors my body in country long after the architects and builders have packed up their tools and left. This is so regardless of whether a home is built, bought, rented or squatted in. Ihab Hassan writes that, “Home is not where one is pushed into the light, but where one gathers it into oneself to become light” (417), an aphorism that might be rephrased as follows: “Home is not where one is pushed into the country, but where one gathers it into oneself to become country.” For the in-and-out-and-around-and-about domestic dweller of the twenty-first century, then, home is where both regional and global forms of country decisively enter the soul via the conduits of the virtuality of digital flows and the reality of architectural footings. 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People are generally quite good at adapting to changes in body shape and size because of the flexibility of the body representation. By means of bodily illusions, it is possible to experimentally induce updating of body representation and, thus, manipulate the sense of self. The main aim of this thesis is to investigate the sense of self through bodily illusions. Firstly, we investigated the relationship between the sense of ownership and self-localisation (Study 1). The results from this study are taken to suggest that the proprioceptive drift (i.e. a bias in the localisation of a given body part) is more likely triggered by and related to the visual capture of touch than it is a reliable measure of a shift in the sense of body ownership. In fact, our data show that the proprioceptive drift occurs not only in the absence of a shift in the sense of ownership, but even in the absence of a body-like object. Secondly, we investigated self-localisation of body parts by means of a novel illusion, the Disappearing Hand Trick. In particular, we explored the role of vision and proprioception (Study 2), as well as the role of attention and motor acts (Study 3), in locating one’s own hands when visual and proprioceptive information regarding the body are incongruent. Our data (Study 2) are in line with previous research, confirming a predominant role of vision over proprioception. In addition, they show that, after a certain amount of time, proprioception is weighted more heavily than vision. That is, our results demonstrate that the cortical proprioceptive representations can be updated even when there is no real need to do it (i.e. no movement is required). This might be seen as an evolutionarily convenient response to keep the body ready for a possible quick reaction. In Study 3, we ruled out the possibility that this effect was only driven by spatial attention being directed towards the side of the space where the hand was actually located. In fact, no difference in the localisation accuracy was found when the direction of spatial attention was manipulated. Finally, by asking the participants to reach across for their hidden right hand (Study 3), we confirmed that a motor act accelerates the reliance on proprioception, most likely by aligning the motor and perceptual coordinates in order to plan the movement. In the first three studies, a modification of the body representation was intentionally induced – namely, the purpose of the illusions was to change how the participants perceived their body. However, we wondered whether this same change might also occur at a more implicit level and how rapidly this may occur. We designed two different studies in which we tried to manipulate the participants’ perceived body size by providing incongruent information about the position of their limb (Study 4) or by showing the participants images of unrealistic bodies (Study 5). In Study 4 we showed that incongruent proprioceptive information coming from the same joint does not affect the perceived size of that body part, but does lead to a more accurate estimation of its position. On the other hand, the results of Study 5 would seem to suggest that body perception is more vulnerable to change in women than in men after exposure to same-sex ideal bodies. Taken together, these results suggest that, by manipulating the body representation, both explicitly, by means of a variety of bodily illusion, and even implicitly, by generating subtle incongruence between one’s own real body and how the body ‘should’ be, we were able to shed some light on the mechanisms behind the computation of body position and size, both of which are important elements for the definition of the self.