By Angelika Peer, Christos D. Giachritsis
Immersive Multimodal Interactive Presence presents complex interdisciplinary methods that attach psychophysical and behavioral haptics study with advances in haptic expertise and haptic rendering.
It offers a precis of the implications accomplished within the IMMERSENCE ecu venture and contains chosen chapters through foreign researchers. prepared into components: I. Psychophysical and Behavioral foundation and II. know-how and Rendering, it's a superb instance of interdisciplinary learn directed in the direction of the development of multimodal immersive digital environments with specific concentrate on haptic interplay.
The twelve chapters of the e-book are grouped round 3 diversified situations representing types of interactions in digital environments: Person-Object (PO), Person-Object-Person (POP) and Person-Person (PP) interplay. fresh result of psychophysical and behavioral stories are mentioned besides new technological advancements for haptic monitors and novel haptic rendering techniques.
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Sample text
This main conclusion is supported by the fact that voluntary movements on different limbs do not affect the tactile discrimination performance. P. Vitello et al. movement does not only affect the detection threshold but also the discrimination threshold. Another finding that supports the involvement of a motor command in tactile suppression is that tactile sensitivity decreases before the arm movement and that the electromyografic signal was detected before the muscle contraction. This indicates the presence of the motor command prior to the muscle activity which is known to induce a gating effect of the afferent pathway leading to reduced tactile information in the CNS and, thus, to a poorer representation of tactile stimuli and to poorer discrimination abilities.
Effects of related sensory inputs on motor performances in man studied through changes in perceived heaviness. Am. J. Physiol. 272(3), 653 (1977) 7. : Sensations of heaviness. Brain 100(2), 345 (1977) 8. : Mass-discrimination in weightlessness and readaptation to Earth’s gravity. Exp. Brain Res. 64(2), 358–366 (1986) 9. : The power of touch: Weighting up the value of touch (2007) 10. : Design of a multiple contact point haptic interface. In: Eurohaptics, Birmingham, UK, pp. 146–148 (2001) 11.
23] gained evidence that tac- 2 Active Movement Reduces the Tactile Discrimination Performance 31 tile afferent input to spinal cord interneurons is blocked during active wrist movement in awake monkeys. They claim that a presynaptic inhibition is effectively produced by descending motor commands. Their findings are congruent with our results showing that a descending motor command, which is present only in the “active” condition, is supposed to be responsible for a significant drop in tactile discrimination performance prior to the movement onset (Fig.