AI Article Synopsis
- The four information-processing channels of glabrous skin (P and NP channels) have distinct tuning characteristics influenced by sensory receptors and afferent nerve fibers.
- An updated model includes broader frequency measurements for the P and NP I channels using forward-masking and adaptation tuning curve methods.
- Key differences between the P and NP channels include the P channel's unique abilities for temporal and spatial summation, greater age-related sensitivity decline in the P channel, and limited interactions between channels when stimuli are processed.
Article Abstract
The four information-processing channels of glabrous skin have distinct tuning characteristics which appear to be determined in the periphery at the level of sensory receptors and their afferent nerve fibers. The four-channel model [J Acoust Soc Am 84 (1988) 1680] has been updated to include measurement over a wider frequency range of tuning of the P and NP I channels, psychophysically determined by forward-masking and adaptation tuning curve methods. In addition to differences in their tuning, the P and NP channels differ in the following ways: (1) the P channel, but not NP channels, has been found to be capable of temporal summation, which operates by neural integration; (2) the capacity for spatial summation is also an exclusive property of the P channel; (3) sensitivity declines with age at a greater rate in the P channel than in the NP channels; (4) the masking or adaptation of a channel has no effect on the sensitivity of the other channels, although the channels interact in the summation of the perceived magnitudes of stimuli presented to separate channels.
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| http://dx.doi.org/10.1016/s0166-4328(03)00177-3 | DOI Listing |
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