دورية أكاديمية
Relationship between vibrotactile detection threshold in the Pacinian channel and complex mechanical modulus of the human glabrous skin.
| العنوان: | Relationship between vibrotactile detection threshold in the Pacinian channel and complex mechanical modulus of the human glabrous skin. |
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| المؤلفون: | Yildiz MZ; Institute of Biomedical Engineering, Boğaziçi University, Çengelköy, İstanbul, Turkey., Güçlü B |
| المصدر: | Somatosensory & motor research [Somatosens Mot Res] 2013; Vol. 30 (1), pp. 37-47. Date of Electronic Publication: 2013 Jan 16. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: Informa Healthcare Country of Publication: England NLM ID: 8904127 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1369-1651 (Electronic) Linking ISSN: 08990220 NLM ISO Abbreviation: Somatosens Mot Res Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: London : Informa Healthcare Original Publication: New York : Guilford Press, c1988- |
| مواضيع طبية MeSH: | Electric Impedance* , Skin Physiological Phenomena*, Pacinian Corpuscles/*physiology , Sensory Thresholds/*physiology , Skin/*innervation , Touch/*physiology, Adult ; Analysis of Variance ; Female ; Fingers/physiology ; Humans ; Male ; Vibration |
| مستخلص: | The goal of this study was to investigate the relationship between the psychophysical vibrotactile thresholds of the Pacinian (P) channel and the mechanical properties of the skin at the fingertip. Seven healthy adult subjects (age: 23-30) participated in the study. The mechanical stimuli were 250-Hz sinusoidal bursts and applied with cylindrical contactor probes of radii 1, 2, and 3.5 mm on three locations at the fingertip. The duration of each burst was 0.5 s (rise and fall time: 50 ms). The subjects performed a two-interval forced-choice task while the stimulus levels changed for tracking the threshold at 75% probability of detection. There were significant main effects of contactor radius and location (two-way ANOVA, values of p < 0.001). The thresholds decreased as the contactor radius increased (i.e., spatial summation effect) at all locations. The thresholds were lowest near the whorl at the fingertip. Additionally, we measured the mechanical impedance (specifically, the storage and loss moduli) at the contact locations. The storage moduli did not change with the contactor location, but the loss moduli were lowest near the whorl. While the loss moduli decreased, the storage moduli increased (e.g., more springiness) as the contactor radius increased. There was moderate and barely significant correlation between the absolute thresholds and the storage moduli (r = 0.650, p = 0.058). However, the correlation between the absolute thresholds and the loss moduli was high and very significant (r = 0.951, p < 0.001). The results suggest that skin mechanics may be important for locally shaping psychophysical detection thresholds, which would otherwise be expected to be constant due to uniform Pacinian innervention density at the fingertip. |
| تواريخ الأحداث: | Date Created: 20130118 Date Completed: 20130729 Latest Revision: 20130212 |
| رمز التحديث: | 20240829 |
| DOI: | 10.3109/08990220.2012.754754 |
| PMID: | 23323828 |
| قاعدة البيانات: | MEDLINE |
PDF full text from Publisher | تدمد: | 1369-1651 |
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| DOI: | 10.3109/08990220.2012.754754 |