Brain–machine interfaces combining visual, auditory, and tactile feedback have been previously used to generate embodiment experiences during spinal cord injury rehabilitation. It is not known if adding temperature to these modalities can result in discomfort with embodiment experiences. Here, comfort levels with the embodiment experiences were investigated in an intervention that required a chronic pain SCI patient to generate lower limb motor imagery commands in an immersive environment combining visual, auditory, tactile, and thermal feedback. Assessments were made pre-/ post-, throughout (...) the intervention, and at 7 weeks follow up. Overall, high levels of embodiment in the adapted three-domain scale of embodiment were found throughout the sessions. No significant adverse effects of VR were reported. Although sessions induced only a modest reduction in pain levels, an overall reduction occurred in all pain scales at follow up. A high degree of comfort in the comfort scale for the thermal-tactile sleeve, in both the thermal and tactile feedback components of the sleeve was reported. This study supports the feasibility of combining multimodal stimulation involving visual, auditory, tactile, and thermal feedback to generate embodiment experiences in neurorehabilitation programs. (shrink)

Objects which a human agent controls by efferent activities can be perceived by the agent as belonging to his or her body. This suggests that what an agent counts as “body” is plastic, depending on what she or he controls. Yet there are possible limitations for such momentary plasticity. One of these limitations is that sensations stemming from the body and sensations stemming from objects outside the body are not integrated if they do not sufficiently “match”. What “matches” and what (...) does not is conceivably determined by long–term experience with the perceptual changes that body movements typically produce. Children have accumulated less sensorimotor experience than adults have. Consequently, they express higher flexibility to integrate body-internal and body-external signals, independent of their “match” as suggested by rubber hand illusion studies. However, children’s motor performance in tool use is more affected by mismatching body-internal and body-external action effects than that of adults, possibly because of less developed means to overcome such mismatches. We review research on perception-action interactions, multisensory integration, and developmental psychology to build bridges between these research fields. By doing so, we account for the flexibility of the sense of body ownership for actively controlled events and its development through ontogeny. This gives us the opportunity to validate the suggested mechanisms for generating ownership by investigating their effects in still developing and incomplete stages in children. We suggest testable predictions for future studies investigating both body ownership and motor skills throughout the lifespan. (shrink)

This paper looks to phenomenology and enactive cognition in order to shed light on the self and sense of self of patients with locked-in syndrome. It critically discusses the concept of the minimal self, both in its phenomenological and ontological dimension. Ontologically speaking, the self is considered to be equal to a person’s sensorimotor embodiment. This bodily self also grounds the minimal sense of self as being a distinct experiential subject. The view from the minimal bodily self presupposes that sociality (...) comes after the self, or that in other words, the essence of self remains independent of our social interactions and relations. In this paper, I rely on the idea of enactive autonomy and Heidegger’s and Merleau-Ponty’s views of human existence as primordially social, to argue for the contrary. The self is fundamentally relational and this is also reflected at the level of the subjective experience of being a self. I indicate how a strong relational view of selfhood can serve as a preliminary heuristic to make sense of the situation of the patient with LIS and conclude with some practical implications concerning patient autonomy, our ethical responsibility toward the patient, and the possibilities for improving the life of patients with LIS. (shrink)