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Titolo:
Temporal cues contribute to tactile perception of roughness
Autore:
Cascio, CJ; Sathian, K;
Indirizzi:
Emory Univ, Sch Med, Dept Neurol, Atlanta, GA 30322 USA Emory Univ Atlanta GA USA 30322 h Med, Dept Neurol, Atlanta, GA 30322 USA
Titolo Testata:
JOURNAL OF NEUROSCIENCE
fascicolo: 14, volume: 21, anno: 2001,
pagine: 5289 - 5296
SICI:
0270-6474(20010715)21:14<5289:TCCTTP>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRIMARY SOMATOSENSORY CORTEX; AFFERENT FIBER RESPONSES; MONKEYS MACACA-MULATTA; ACTIVE TOUCH; TEXTURE-PERCEPTION; NEURAL CODES; PERCEIVED ROUGHNESS; SINUSOIDAL MOVEMENT; NEURONAL-ACTIVITY; PASSIVE TOUCH;
Keywords:
human; perception; somatosensory; touch; finger; texture; gratings; roughness; temporal frequency; psychophysics; discrimination; magnitude estimation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
48
Recensione:
Indirizzi per estratti:
Indirizzo: Sathian, K Emory Univ, Sch Med, Dept Neurol, WMRB-6000, Atlanta, GA 30322 USA Emory Univ WMRB-6000 Atlanta GA USA 30322 Atlanta, GA 30322 USA
Citazione:
C.J. Cascio e K. Sathian, "Temporal cues contribute to tactile perception of roughness", J NEUROSC, 21(14), 2001, pp. 5289-5296

Abstract

Optimal perception of surface roughness requires lateral movement between skin and surface, suggesting the importance of temporal cues. The roughnessof periodic gratings is affected by changing either inter-element spacing (groove width, G) or element width (ridge width, R). Peripheral neural responses to gratings depend quantitatively on a spatial variable, G, and a temporal variable, grating temporal frequency (F-t), with changes in R acting indirectly through concomitant changes in F-t. We investigated, psychophysically, the contribution of temporal cues to human tactile perception of roughness, using gratings varying in either R or G. Gratings were scanned across the immobile fingerpad with controlled movement speed (S) and contact force. in one experiment, we found that roughness magnitude estimates depended on both G and F-t. In a second experiment, discrimination of the roughness of gratings varying in either R or G was affected by manipulating F-t. Overall, the effect of G on roughness judgments was much stronger than that of F-t, probably explaining why many previous studies using surfaces that varied only in inter-element spacing led to the conclusion that temporal factors play no role in roughness perception. However, the perceived roughness of R-varying gratings was determined by F-t and not spatial variables. Roughness judgments were influenced by G and F-t in a manner entirely consistent with predicted afferent response rates. Thus perceived roughness, like peripheral afferent responses, depends in part on temporal variables.

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Documento generato il 05/04/20 alle ore 06:53:26