Analysis of Somatosensory Cortical Responses to Different Electrotactile Stimulations as a Method Towards an Objective Definition of Artificial Sensory Feedback Stimuli - An MEG Pilot Study

Jia Liu*, Harri Piitulainen, Ivan Vujaklija

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference article in proceedingsScientificvertaisarvioitu

Abstrakti

Sensory feedback is a critical component in many human-machine interfaces (e.g., bionic limbs) to provide missing sensations. Specifically, electrotactile stimulation is a popular feedback modality able to evoke configurable sensations by modulating pulse amplitude, duration, and frequency of the applied stimuli. However, these sensations coded by electrotactile parameters are thus far predominantly determined by subjective user reports, which leads to heterogeneous and unstable feedback delivery. Thus, a more objective understanding of the impact that different stimulation parameters induce in the brain, is needed. Analysis of cortical responses to electrotactile afference might be an effective method in this regard. In this study, we used magnetoencephalography (MEG) to investigate the somatosensory evoked fields (SEFs) and equivalent current dipoles (ECDs) locations in nine non-invasive electrotactile stimulation conditions (1.2T, 1.5T, 1.8T) × (1 ms, 10 ms, 100 ms) with fixed 1s interval. T is the subject specific sensory threshold of the left index finger. In all conditions, we observed SEFs peaking at 60 ms in the contralateral primary somatosensory cortex. While the amplitudes of the SEFs around 60 ms followed the increase in the stimulation pulse amplitude, the cortical activations were strongest when the stimulus pulse duration was set to 10 ms. These initial results indicate that the somatosensory cortical activations can provide information on the electrotactile parameters of pulse amplitude and duration, and the prosed methodology might be used for an objective interpretation of different artificial sensory feedback arrangements. Clinical Relevance-Analysis of cortical spatiotemporal representations to electrotactile stimulation can potentially be used for tailoring optimal sensory feedback delivery in patients with sensorimotor impairments.

AlkuperäiskieliEnglanti
Otsikko44th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2022
KustantajaIEEE
Sivut4813-4816
Sivumäärä4
ISBN (elektroninen)978-1-7281-2782-8
ISBN (painettu)978-1-7281-2783-5
DOI - pysyväislinkit
TilaJulkaistu - 2022
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaAnnual International Conference of the IEEE Engineering in Medicine and Biology Society - Glasgow, Iso-Britannia
Kesto: 11 heinäk. 202215 heinäk. 2022
Konferenssinumero: 44

Julkaisusarja

NimiAnnual International Conference of the IEEE Engineering in Medicine and Biology Society
Vuosikerta2022-July
ISSN (painettu)2375-7477
ISSN (elektroninen)2694-0604

Conference

ConferenceAnnual International Conference of the IEEE Engineering in Medicine and Biology Society
LyhennettäEMBC
Maa/AlueIso-Britannia
KaupunkiGlasgow
Ajanjakso11/07/202215/07/2022

Sormenjälki

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