Seminariet äger rum onsdag den 19 oktober 2016, kl 14-15 i konferensrummet 357, Frescati Hagväg 14, plan 3.

Abstract

The feeling that the body is part of the self (body ownership) and the experience that the body is located somewhere in space (self-location) have been highlighted as two key aspects of bodily self-consciousness. Building on evidence from neurophysiological studies in monkeys and neuropsychological work in humans, it has been hypothesized that the brain distinguishes the body from external objects via the integration of signals across sensory modalities performed by neuronal populations in premotor and posterior parietal regions. To provide experimental evidence for these predictions and to examine the relatively unexplored relationship between body ownership and self-location, we conducted a series of studies using perceptual body illusions to manipulate specific aspects of bodily self-consciousness. A multimodal approach consisting of behavioral, fMRI and ECoG measurements as well as electrical brain stimulation in human participants was used. First, we show that correlated multisensory stimulation can lead to dynamic changes in the internal body representation, including the perception of supernumerary or even invisible limbs. Second, we used a multisensory ’full-body’ illusion to manipulate perceived self-location and utilized fMRI and multivoxel pattern analysis to study the neural interplay between the senses of body ownership and self-location. Finally, we show that direct stimulation of the somatosensory cortex can be used to elicit a multisensory illusion of owning a prosthetic limb. Clarifying the neural processes that underlie body ownership and self-location will increase our understanding of how the brain constructs the coherent experience of our body in space, which could have important applications in the fields of virtual reality and neuroprosthetics.

Avdelningen för perception och psykofysik ansvarar för dagens seminarium.

Om Allmänna seminarieserien

Institutionens forskningsavdelningar samarbetar i Allmänna seminarieserien, där nationella och internationella forskare inbjuds att tala om aktuella forskningsämnen. Seminarierna äger rum onsdagar kl 14-15 i rum 357 om annat ej anges. Extraseminarier kan förekomma på andra dagar och tider, bl a halvtidsseminarier i forskarutbildningen.

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