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- W2017891044 abstract "The perception and discrimination of texture is an important part of cutaneous tactile function, and requires the use of both spatial and temporal information. Earlier studies that have used a variety of stimulators to measure tactile responses to temporal and spatial variations will be reviewed. A stimulus that has been successfully employed in the study of visual pattern perception, but has not been available for tactile research, is the spatio-temporal sinusoid, where the amplitude of the stimulus varies sinusoidally along one spatial dimension and in time. A new, 88-element linear stimulator array, constructed to produce tangible spatio-temporal sinusoids, is described. Each element in the array is a plate of a piezoelectric ceramic. The elements are assembled on 0.38-mm centers for a total array length of 33.4 mm. Therefore, the spatial wavelengths that can be produced by the array range from 0.76–33.4 mm. The temporal bandwidth of the array is 0.8–1000 Hz, and the maximum stimulus amplitude is 8 μ zero to peak. The array was used to measure detection thresholds at live temporal frequencies (1, 4, 16, 64, and 256 Hz) and five spatial wavelengths (1.81, 3.62, 7.23, 14.5, and infinite mm). The detection thresholds reveal two receptor populations, presumably the NP I and P systems described by Verrillo and colleagues. The NP I system is more sensitive than the P system at short wavelengths and at low temporal frequencies, and less sensitive than the P system at high frequencies and long wavelengths. These results are consistent with earlier psychophysical and physiological experiments." @default.
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- W2017891044 date "1986-12-01" @default.
- W2017891044 modified "2023-10-18" @default.
- W2017891044 title "Measurement of tactile spatio‐temporal sensitivity" @default.
- W2017891044 doi "https://doi.org/10.1121/1.2023788" @default.
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