Neural coding of tactile texture: Comparison of spatial and temporal mechanisms for roughness perception

C. E. Connor, K. O. Johnson

Research output: Contribution to journalArticlepeer-review

Abstract

A previous study showed that roughness perception may depend on either temporal or spatial variations in firing rate among cutaneous mechanoreceptive afferents. The present study was designed to distinguish between these hypotheses. Plastic surfaces embossed with patterns of dots designed to produce predictable alterations in temporal and spatial firing rate variation were used as stimuli in psychophysical and neurophysiological experiments. Subjective roughness magnitudes obtained from psychophysical experiments fitted the predictions of the spatial but not the temporal hypothesis. In the neurophysiological experiments, the stimuli were scanned across the receptive fields of cutaneous mechanoreceptive afferents. Firing rate variation in the neural responses was measured using a range of temporal and spatial filters. Temporal variation was not correlated with roughness magnitude. Spatial variation, on a scale of 1-2 mm (one to two receptor spacings), was closely correlated with roughness.

Original languageEnglish (US)
Pages (from-to)3414-3426
Number of pages13
JournalJournal of Neuroscience
Volume12
Issue number9
DOIs
StatePublished - 1992

ASJC Scopus subject areas

  • Neuroscience(all)

Fingerprint Dive into the research topics of 'Neural coding of tactile texture: Comparison of spatial and temporal mechanisms for roughness perception'. Together they form a unique fingerprint.

Cite this