The objective of this project is to understand how human subjects perceive tactile patterns. The project will focus on the processing of spatiotemporal patterns and the interactions that occur between spatial patterns presented to the same and to separate locations. The results from the psychophysical measures will be related to neurophysiological studies of peripheral and central responses to tactile stimuli. Several types of displays will generate the tactile patterns. One of these is the dense array that consists of 400, independently controlled tactors. This display will be used to generate and test subjects' sensitivity to drilling, sinusoidal spatiotemporal patterns of various wavelengths and frequency. The array will also be used to activate selectively different populations of mechanoreceptors. The effect of such variables as contactor penetration, velocity, and site of stimulation on spatial and intensive sensitivity will also be measured. Using the dense array as well as arrays from the Optacon, a reading aid for the blind, temporal interactions such as masking, response competition, and temporal integration will be examined. The project will also be concerned with the effect of pattern movement on interactions between tactile stimuli and between tactile and visual stimuli. One of the aims of the project is to compare results obtained with tactile stimuli to studies conducted with visual and auditory stimuli. The results from these projects will be relevant to the development of cutaneous communication systems for the deaf, blind, and deaf-blind. The results will also be relevant to the effects that intermediate surfaces such as surgical gloves have on tactile sensitivity and to the measurement and understanding of neurological problems.
| Craig, James C; Rhodes, Roger P; Busey, Thomas A et al. (2010) Aging and tactile temporal order. Atten Percept Psychophys 72:226-35 |
| Pei, Yu-Cheng; Hsiao, Steven S; Craig, James C et al. (2010) Shape invariant coding of motion direction in somatosensory cortex. PLoS Biol 8:e1000305 |
| Pei, Yu-Cheng; Denchev, Peter V; Hsiao, Steven S et al. (2009) Convergence of submodality-specific input onto neurons in primary somatosensory cortex. J Neurophysiol 102:1843-53 |
| Yoshioka, Takashi; Zhou, Julia (2009) Factors Involved in Tactile Texture Perception through Probes. Adv Robot 23:747-766 |
| Bensmaia, S J; Hsiao, S S; Denchev, P V et al. (2008) The tactile perception of stimulus orientation. Somatosens Mot Res 25:49-59 |
| Pei, Y C; Hsiao, S S; Bensmaia, S J (2008) The tactile integration of local motion cues is analogous to its visual counterpart. Proc Natl Acad Sci U S A 105:8130-5 |
| Bensmaia, Sliman J; Denchev, Peter V; Dammann 3rd, J Francis et al. (2008) The representation of stimulus orientation in the early stages of somatosensory processing. J Neurosci 28:776-86 |
| Craig, James C; Rhodes, Roger P; Gibson, Gregory O et al. (2008) Discriminating smooth from grooved surfaces: effects of random variations in skin penetration. Exp Brain Res 188:331-40 |
| Muniak, Michael A; Ray, Supratim; Hsiao, Steven S et al. (2007) The neural coding of stimulus intensity: linking the population response of mechanoreceptive afferents with psychophysical behavior. J Neurosci 27:11687-99 |
| Gibson, Gregory O; Craig, James C (2006) The effect of force and conformance on tactile intensive and spatial sensitivity. Exp Brain Res 170:172-81 |
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