Relation between vibrotactile perception thresholds and reductions in finger blood flow induced by vibration of the hand at frequencies in the range 8–250 Hz

Yao, Yuqi; Griffin, Michael J.

doi:10.1007/s00421-014-2885-y

Cited by 10 publications

(17 citation statements)

References 30 publications

(49 reference statements)

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“…The findings are consistent with Ekenvall et al ( 1989 ) who found no relation between vascular symptoms and the outcome of sensory testing. Whereas the chronic changes giving rise to finger blanching are not clearly associated with thresholds, acute reductions in finger blood flow caused by vibration are associated with thresholds for the perception of vibration (Ye and Griffin 2011 , 2014 , 2016b ). The contradiction implies that the acute and chronic changes have different mechanisms, with the vascular impairment in vibration-exposed persons being associated with either a different form of neurological damage or some form of local structural damage causing the vascular phenomenon known as vibration-induced white finger.…”

Section: Discussionmentioning

confidence: 99%

Assessment of thermotactile and vibrotactile thresholds for detecting sensorineural components of the hand–arm vibration syndrome (HAVS)

Yao

Griffin

2017

Int Arch Occup Environ Health

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BackgroundThermotactile thresholds and vibrotactile thresholds are measured to assist the diagnosis of the sensorineural component of the hand–arm vibration syndrome (HAVS).ObjectivesThis study investigates whether thermotactile and vibrotactile thresholds distinguish between fingers with and without numbness and tingling.MethodsIn 60 males reporting symptoms of the hand–arm vibration syndrome, thermotactile thresholds for detecting hot and cold temperatures and vibrotactile thresholds at 31.5 and 125 Hz were measured on the index and little fingers of both hands.ResultsIn fingers reported to suffer numbness or tingling, hot thresholds increased, cold thresholds decreased, and vibrotactile thresholds at both 31.5 and 125 Hz increased. With sensorineural symptoms on all three phalanges (i.e. numbness or tingling scores of 6), both thermotactile thresholds and both vibrotactile thresholds had sensitivities greater than 80% and specificities around 90%, with areas under the receiver operating characteristic curves around 0.9. There were correlations between all four thresholds, but cold thresholds had greater sensitivity and greater specificity on fingers with numbness or tingling on only the distal phalanx (i.e. numbness or tingling scores of 1) suggesting cold thresholds provide better indications of early sensorineural disorder.ConclusionsThermotactile thresholds and vibrotactile thresholds can provide useful indications of sensorineural function in patients reporting symptoms of the sensorineural component of HAVS.

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Section: Discussionmentioning

confidence: 99%

Assessment of thermotactile and vibrotactile thresholds for detecting sensorineural components of the hand–arm vibration syndrome (HAVS)

Yao

Griffin

2017

Int Arch Occup Environ Health

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“…Therefore, the profiles detected by the profilometer must be filtered according to the human discriminative capacity for vibrotactile frequencies. According to Hollins et al [19] the scanning velocity of the fingers is on average 90 mms -1 and to Ye et al [20], the vibration is perceptible by fingers through vasoconstriction with a frequency greater than 63 Hz. Meanwhile, the discriminative capacity of human fingers equals the ratio of the scanning velocity and the frequency [21].…”

Section: Filter and Sample Lengthmentioning

confidence: 99%

Cost, sustainability and surface roughness quality – A comprehensive analysis of products made with personal 3D printers

Linke

Voet

et al. 2017

CIRP Journal of Manufacturing Science and Technology

106

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Additive Manufacturing (AM), generally also referred to as 3D printing, has gone through vast development in the past 20 years which still continues. In particular, the market segment of personal 3D printers has achieved an average annually growth rate of approximately 170% from 2008 to 2013. The purpose of this research is to identify the best AM process applied in personal printers in terms of cost, sustainability, surface roughness, and human perception, as these aspects are essential for this new thriving market segment's future. In addition, the research investigates which objective roughness parameters are suitable for qualifying subjective perceptions. The primary AM processes, Fused Deposition Modeling, Stereolithography and Polyjet printing are in the focus of this research. Manufacturing costs as well as environmental impact are calculated, five independent roughness parameters (Ra, Rz, Rq, Rsk, and Rku) are measured and the subjective perception of samples is assessed through sensorial analysis. In conclusion, samples manufactured with Polyjet printing have the best subjective quality, but the highest costs and environmental impact. Biplots of roughness parameters versus sensorial ranking indicates a significant correlation between maximum peak-to-valley height Rz and tactile and visual perception, while the kurtosis of the topography height distribution Rku correlated best to the hedonic rank.

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“…This is also consistent with the Pacinian channel being involved in changes in finger blood flow during exposure to vibration. Over the frequency range from 8 to 250 Hz reductions in finger blood flow at higher frequencies (63,125 and 250 Hz) are associated with individual thresholds for perceiving these frequencies, but at the lower frequencies (8, 16 and 31.5 Hz), there was no relation between thresholds and vasoconstriction (Ye and Griffin 2014). The difference in vascular response to the higher and lower frequencies may arise from the different mechanoreceptors activated when determining thresholds at high and low frequencies.…”

Section: Introductionmentioning

confidence: 96%

“…The mechanisms responsible for the vasoconstriction arising from acute and chronic exposures to hand-transmitted vibration are not understood. Vibration may cause changes in finger blood flow through a central sympathetic reflex (Gemne 1994;Bovenzi et al, 2006, Ye and Griffin 2011, 2013, 2014. Any such a reflex requires a stimulus, such as the excitation by vibration of mechanoreceptors in the hand (Ye and Griffin 2011, 2013, 2014.…”

Section: Introductionmentioning

confidence: 99%

“…The NPIII channel may have a lower threshold than other channels in the frequency range 0.4 to 4 Hz (Greenspan and Bolanowski 1996). By selecting the frequency and the magnitude of vibration and the contact conditions between the source of vibration and the skin, different mechanoreceptors can be activated (Morioka and Griffin 2005;Ye and Griffin 2011, 2013, 2014.…”

Section: Introductionmentioning

confidence: 99%

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Reductions in finger blood flow induced by 125-Hz vibration: effect of location of contact with vibration

Yao

Griffin

2015

Int Arch Occup Environ Health

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Relation between vibrotactile perception thresholds and reductions in finger blood flow induced by vibration of the hand at frequencies in the range 8–250 Hz

Cited by 10 publications

References 30 publications

Assessment of thermotactile and vibrotactile thresholds for detecting sensorineural components of the hand–arm vibration syndrome (HAVS)

Assessment of thermotactile and vibrotactile thresholds for detecting sensorineural components of the hand–arm vibration syndrome (HAVS)

Cost, sustainability and surface roughness quality – A comprehensive analysis of products made with personal 3D printers

Reductions in finger blood flow induced by 125-Hz vibration: effect of location of contact with vibration

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