Some characteristics of tactile channels

Gescheider, George A.; Bolanowski, Stanley J.; Verrillo, Ronald T.

doi:10.1016/s0166-4328(03)00177-3

Cited by 81 publications

(75 citation statements)

References 23 publications

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“…The best fit equation provided the lowest MSE of 0.084 and the highest adjusted coefficient of determination 2 a R of 0.983 using only 12 coefficients. Compared to the other regression procedures used in this study, the equal sensation curves obtained by means of stepwise regression suggested small variations in the shape of the curves at low vibration amplitudes and more uniform shape at high vibration amplitudes, resembling the curves defined by previous researchers Gescheider et al, 2004). A possible explanation of the effectiveness for the stepwise regression procedure may be that only a small number of coefficients were included in the model.…”

Section: Discussionsupporting

confidence: 58%

Effects of gender differences on the subjective perceived intensity of steering wheel rotational vibration based on a multivariate regression model

Jeon

Ajovalasit

Giacomin

2009

International Journal of Industrial Ergonomics

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The aims of this study were to determine equal sensation curves for hand-arm steering wheel rotational vibration and to investigate the effect of gender on the subjective perceived intensity of steering wheel hand-arm vibration. Psychophysical response tests of 40 participants (20 males and 20 females) were performed using a steering wheel rotational vibration simulator using the category ratio Borg CR10 scale procedure for direct estimation of perceived intensity. The test stimuli were sinusoidal vibrations at 22 third octave band centre frequencies in the range from 3 to 400 Hz, with acceleration amplitudes in the range from 0.04 to 27 m/s 2 r.m.s.. Multivariate regression procedures were applied to the experimentally acquired data in order to establish a regression model expressing the Borg CR 10 perceived intensity values as a function of the two independent parameters of the frequency and amplitude of vibration. The equal sensation curves suggested a nonlinear dependency of the subjective perceived intensity on both frequency and amplitude. Females were found to provide higher Borg CR10 perceived intensity values than males (p<0.05), particularly at the higher intensity levels above approximately 1.0 m/s 2 r.m.s and at the higher frequencies above approximately 20 Hz.Relevance to industry: For the manufacturers of steering systems and of other automobile components this study provides vibration perception curves and identifies the possible importance of gender towards the perception of vibration which arrives at the steering wheel.

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Section: Discussionsupporting

confidence: 58%

Effects of gender differences on the subjective perceived intensity of steering wheel rotational vibration based on a multivariate regression model

Jeon

Ajovalasit

Giacomin

2009

International Journal of Industrial Ergonomics

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“…Because tactile feedback on spontaneous movements has been shown to be instrumental for fine tuning of receptive fields in NWR modules, we then tested the effect of adding on constant tactile noise over large skin areas by placing pups together with their mother in a vibrating cage for increasing time periods from P3 and on (vibration frequency ϳ200 Hz,) (Gescheider et al, 2004). The tactile input, unrelated to spontaneous movements, present in this situation was hypothesized to disturb adequate receptive field formation, leading to smeared receptive fields and inappropriate reflex responses.…”

Section: Reorganization Is Activity Dependentmentioning

confidence: 99%

Action-Based Body Maps in the Spinal Cord Emerge from a Transitory Floating Organization

Granmo¹,

Petersson²,

Schouenborg³

2008

J. Neurosci.

101

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During development primary afferents grow into and establish neuronal connections in the spinal cord, thereby forming the basis for how we perceive sensory information and control our movements. In the somatosensory system, myriads of primary afferents, conveying information from different body locations and sensory modalities, get organized in the dorsal horn of the spinal cord so that spinal multisensory circuits receive topographically ordered information. How this intricate pathfinding is brought about during development is, however, largely unknown. Here we show that a body representation closely related to motor patterns emerges from a transitory floating and plastic organization through profound activity-dependent rewiring, involving both sprouting and elimination of afferent connections, and provide evidence for cross-modality interactions in the alignment of the multisensory input. Thus, far from being inborn and stereotypic, the dorsal horn of the spinal cord now appears to be a highly adaptive brain-body interface.

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“…In analogy to the primate tactile system (Bolanowski et al, 1988), this finding is suggestive of the existence of two psychophysical channels of differing sensitivity ranges. In psychophysics, the term "channel" is used to designate subsystems that sample different regions of the energy spectrum to which the system is responsive (Gescheider et al, 2004). In the human tactile system, four such channels were identified for the glabrous skin (Bolanowski et al, 1988) and aligned to the four cutaneous mechanoreceptors and their associated nerve fibers (Mountcastle et al, 1967).…”

Section: Introductionmentioning

confidence: 99%

Two Psychophysical Channels of Whisker Deflection in Rats Align with Two Neuronal Classes of Primary Afferents

2006

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The rat whisker system has evolved into in an excellent model system for sensory processing from the periphery to cortical stages. However, to elucidate how sensory processing finally relates to percepts, methods to assess psychophysical performance pertaining to precise stimulus kinematics are needed. Here, we present a head-fixed, behaving rat preparation that allowed us to measure detectability of a single whisker deflection as a function of amplitude and peak velocity. We found that velocity thresholds for detection of smallamplitude stimuli (Ͻ3°) were considerably higher than for detection of large-amplitude stimuli (Ͼ3°). This finding suggests the existence of two psychophysical channels mediating detection of whisker deflection: one channel exhibiting high amplitude and low velocity thresholds (W1), and the other channel exhibiting high velocity and low amplitude thresholds (W2). The correspondence of W1 to slowly adapting (SA) and W2 to rapidly adapting (RA) neuronal classes in the trigeminal ganglion was revealed in acute neurophysiological experiments. Neurometric plots of SA and RA cells were closely aligned to psychophysical performance in the corresponding W1 and W2 parameter ranges. Interestingly, neurometric data of SA cells fit the behavior best if it was based on a short time window integrating action potentials during the initial phasic response, in contrast to integrating across the tonic portion of the response. This suggests that detection performance in both channels is based on the assessment of very few spikes in their corresponding groups of primary afferents.

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Some characteristics of tactile channels

Cited by 81 publications

References 23 publications

Effects of gender differences on the subjective perceived intensity of steering wheel rotational vibration based on a multivariate regression model

Effects of gender differences on the subjective perceived intensity of steering wheel rotational vibration based on a multivariate regression model

Action-Based Body Maps in the Spinal Cord Emerge from a Transitory Floating Organization

Two Psychophysical Channels of Whisker Deflection in Rats Align with Two Neuronal Classes of Primary Afferents

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