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Reductions in finger blood flow induced by 125-Hz vibration: Effect of area of contact with vibration

Reductions in finger blood flow induced by 125-Hz vibration: Effect of area of contact with vibration
Reductions in finger blood flow induced by 125-Hz vibration: Effect of area of contact with vibration

To investigate whether the Pacinian channel is involved in vibration-induced reductions of finger blood flow (FBF), vibrotactile thresholds and vasoconstriction have been studied with 125-Hz vibration and two contact areas: 3- or 6-mm-diameter vibrating probes with 2-mm gaps to fixed surrounds. Fifteen subjects provided thresholds for perceiving vibration at the thenar eminence of the right hand with both contact areas. With both contact areas, FBF was then measured in the middle fingers of both hands during five successive 5-min periods: (i) no force and no vibration, (ii) force and no vibration, (iii) force with vibration 15 dB above threshold, (iv) force and no vibration, and (v) no force and no vibration. Thresholds were in the ranges of 0.16-0.66 ms-2 r.m.s. (6-mm probe) and 0.32-1.62 ms-2 r.m.s. (3-mm probe). With the magnitude of vibration 15 dB above each individual's threshold with the 3-mm probe, the median reduction in FBF with the 6-mm probe (to 70 and 77 % of pre-exposure FBF on the exposed right hand and the unexposed left hand, respectively) was greater than with the 3-mm probe (79 and 85 %). There were similar reductions in FBF when vibration was presented by the two contactors at the same sensation level (i.e. 15 dB above threshold with each probe). The findings are consistent with reductions in FBF arising from excitation of the Pacinian channel: increasing the area excited by vibration increases Pacinian activation and provokes stronger perception of vibration and greater vasoconstriction.

Finger blood flow, Hand-arm vibration syndrome, Hand-transmitted vibration, Vibration-induced white finger, Vibrotactile perception thresholds
0301-5548
1017-1026
Ye, Ying
5cfc9fff-c24f-4e7c-8a97-c78436d79966
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Ye, Ying
5cfc9fff-c24f-4e7c-8a97-c78436d79966
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8

Ye, Ying and Griffin, Michael J. (2013) Reductions in finger blood flow induced by 125-Hz vibration: Effect of area of contact with vibration. European Journal of Applied Physiology and Occupational Physiology, 113 (4), 1017-1026. (doi:10.1007/s00421-012-2518-2).

Record type: Article

Abstract

To investigate whether the Pacinian channel is involved in vibration-induced reductions of finger blood flow (FBF), vibrotactile thresholds and vasoconstriction have been studied with 125-Hz vibration and two contact areas: 3- or 6-mm-diameter vibrating probes with 2-mm gaps to fixed surrounds. Fifteen subjects provided thresholds for perceiving vibration at the thenar eminence of the right hand with both contact areas. With both contact areas, FBF was then measured in the middle fingers of both hands during five successive 5-min periods: (i) no force and no vibration, (ii) force and no vibration, (iii) force with vibration 15 dB above threshold, (iv) force and no vibration, and (v) no force and no vibration. Thresholds were in the ranges of 0.16-0.66 ms-2 r.m.s. (6-mm probe) and 0.32-1.62 ms-2 r.m.s. (3-mm probe). With the magnitude of vibration 15 dB above each individual's threshold with the 3-mm probe, the median reduction in FBF with the 6-mm probe (to 70 and 77 % of pre-exposure FBF on the exposed right hand and the unexposed left hand, respectively) was greater than with the 3-mm probe (79 and 85 %). There were similar reductions in FBF when vibration was presented by the two contactors at the same sensation level (i.e. 15 dB above threshold with each probe). The findings are consistent with reductions in FBF arising from excitation of the Pacinian channel: increasing the area excited by vibration increases Pacinian activation and provokes stronger perception of vibration and greater vasoconstriction.

Text
14721 YY-MJG 2013 Author accepted manuscript - Accepted Manuscript
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More information

e-pub ahead of print date: 12 October 2012
Published date: April 2013
Keywords: Finger blood flow, Hand-arm vibration syndrome, Hand-transmitted vibration, Vibration-induced white finger, Vibrotactile perception thresholds
Organisations: University of Southampton, Human Sciences Group

Identifiers

Local EPrints ID: 406270
URI: https://eprints.soton.ac.uk/id/eprint/406270
ISSN: 0301-5548
PURE UUID: b366a286-6e69-4b28-9240-fb26091e6519
ORCID for Michael J. Griffin: ORCID iD orcid.org/0000-0003-0743-9502

Catalogue record

Date deposited: 10 Mar 2017 10:43
Last modified: 20 Jul 2019 01:27

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