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Functional Magnetic Resonance Imaging of the Human Motor Cortex
Published in Alexa Riehle, Eilon Vaadia, Motor Cortex in Voluntary Movements, 2004
Andreas Kleinschmidt, Ivan Toni
So far, one of the few studies using on-line EMG recordings during fMRI of motor imagery was that of Hanakawa et al.,116 and they did not find significant M1 activation. However, they used an interesting analytical approach. Instead of qualitatively mapping activation under different conditions with a somewhat arbitrary threshold, the authors addressed the quantitative relation of activation effects under imagery and execution of movement. They determined areas with movement-predominant activity, imagery-predominant activity, and activity common to both movement and imagery modes of performance (movement-and-imagery activity). The movement-predominant activity included the primary sensory and motor areas, the parietal operculum, and the anterior cerebellum, which had little imagery-related activity (-0.1~0.1%), and the caudal premotor areas and Brodmann area 5, which
‘Eppur si move’: The Association Between Electrophysiological and Psychophysical Signatures of Perceived Movement Illusions
Published in Journal of Motor Behavior, 2018
Michela Balconi, Davide Crivelli, Marco Bove
By focusing on psychophysical features of motor illusion experiences, we observed that stronger illusions are overall consistently perceived and estimated as longer lasting and that a greater sensitivity to illusory perceptions (i.e., more frequent perceptions) was associated to more vivid and longer illusions on average. The correlations we observed between different psychophysical measures, besides underlining the internal consistency of the aware experiences we induced and investigated, are in line with our hypotheses and previous literature on phenomenological features of movement illusions (see Naito et al., 1999). More generally, as underlined by Metzinger (2003), human self-consciousness and conscious experiences are characterized by at least three primary and necessary basic aspects: feeling of ownership (and often agency), first-person perspective, and—of particular relevance for this discussion—unity. Unified and integrated perceptions and representations, thus, constitute our aware experience of reality and the actual entrance of a perceptual experience in the consciousness domain depends on subjective thresholds, defined as individual propensity to consciously detect and process them. Consistently, and for the first time to our knowledge, we report that such relevant aspect of the illusory experience (i.e., individual frequency of illusory perceptions) proved to be specifically associated to the degree of estimated cortical activity of contralateral superior-medial parietal areas (BA5, BA7, BA31). In particular, psychophysical and neurofunctional data were inversely correlated (i.e., contralateral parietal structures tended to activate less as the frequency of motor illusions increased).
Development of the Body-Relatedness Observation Scale: A feasibility study
Published in Physiotherapy Theory and Practice, 2022
Hanneke Kalisvaart, Saskia van Broeckhuysen-Kloth, Jooske T. van Busschbach, Rinie Geenen
Inter-rater reliability (Table 1) was excellent for four observation scores (ICC > 0.75 or Kappa > 0.80), substantial for two scores (0.60 < ICC < 0.75 or 0.60 < Kappa < 0.80), and fair for two scores (0.40 < ICC < 0.60 or 0.20 < Kappa < 0.40). Six items had poor reliability (ICC < 0.40 or Kappa < 0.20) and were not used in further analysis. Four of them concerned perceiving the body (BP2 to BP5) and two concerned adapted behavior (BA4 and BA5).
Preliminary study on lyrics intelligibility at different pitches in Chinese vocal music
Published in Acta Oto-Laryngologica, 2020
Ge Qu, Yuan-yuan Sun, Bao-qiang Han, Ping Yu, Jian-kun Liu, Shi-ming Yang
Singing samples with five pitches, C4, F4, bB4, bE5, and bA5, respectively, were produced by the eight singers. The singers were required to perform eight testing sentences at the speed of 90 beats per minute at each pitch. Each testing sentence included four testing syllables, and each singer sang 32 syllables. A total of 1280 samples were obtained (5 pitches × 32 syllables × 8 singers = 1280).