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Vibrotactile perception in finger pulps and in the sole of the foot in healthy subjects among children or adolescents.

Dahlin LB, Güner N, Elding Larsson H, Speidel T - PLoS ONE (2015)

Bottom Line: Thresholds at 64 and 125 Hz were generally higher at heel compared to metatarsal heads.VPTs in fingers and in feet are different as related to frequency in healthy girls and boys.Multi Frequency Tactilometry is a future valuable method to detect neuropathy in children and adolescents.

View Article: PubMed Central - PubMed

Affiliation: Department of Translational Medicine-Hand Surgery, Lund University, Skåne University Hospital, Malmö, Sweden.

ABSTRACT

Aims: To evaluate vibrotactile perception at different frequencies in fingers and in foot in healthy girls and boys.

Methods: Vibration perception thresholds (VPTs) were measured in 283 healthy (8-20 years), consecutively included, girls (n=146) and boys (n=137); i.e., 269 children after excluding those with diseases or disorders possibly affecting the nervous system. Thresholds were measured in finger pulps of index and little fingers (seven frequencies; 8-500 Hz) and at first and fifth metatarsal head and at heel in the sole of the foot (six frequencies; 8-250 Hz;) using Multi Frequency Tactilometry.

Results: VPTs, divided in six groups by age and gender (i.e., 8-10 years, 11-15 years and 16-20 years), at all three sites in the sole increased with higher frequencies, but without gender differences. Thresholds at 64 and 125 Hz were generally higher at heel compared to metatarsal heads. VPTs in finger pulps of index and little fingers, with no finger differences, had a different pattern with increasing thresholds with frequency, but with lower thresholds at 64 and 125 Hz. Thresholds at lower frequencies were higher in finger pulps, while at higher frequencies VPTs were lower in finger pulps than in the sole of the foot; thus, vibration perception in the sole was better than perception in finger pulps at lower frequencies and opposite at higher frequencies. VPTs were higher among adolescents than in younger children in the foot, while thresholds were lower in the finger pulps among adolescents, particularly in index finger. Thresholds in finger pulps of index and little fingers, particularly at higher frequencies, correlated with each other, which the three sites in the sole also did.

Conclusions: VPTs in fingers and in feet are different as related to frequency in healthy girls and boys. Multi Frequency Tactilometry is a future valuable method to detect neuropathy in children and adolescents.

No MeSH data available.


Related in: MedlinePlus

Photo showing the experimental set-up.The subject is sitting with the arm/hand and leg/foot, respectively in a relaxed position (A). The investigated skin area (index or little finger, head or the first or fifth metatarsal bone or heel) is placed on a vibrating probe (insert). The subject regulates the intensity of the vibration by pressure a button on a remote control (arrow) in his/her contralateral hand (B). The result is a tactilogram (see Fig. 2). The probe for the foot is shown in (C) and the green light (D) indicates that the pressure is appropriate on the investigated area. The person on the photo is not one of the subjects in the study.
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pone.0119753.g001: Photo showing the experimental set-up.The subject is sitting with the arm/hand and leg/foot, respectively in a relaxed position (A). The investigated skin area (index or little finger, head or the first or fifth metatarsal bone or heel) is placed on a vibrating probe (insert). The subject regulates the intensity of the vibration by pressure a button on a remote control (arrow) in his/her contralateral hand (B). The result is a tactilogram (see Fig. 2). The probe for the foot is shown in (C) and the green light (D) indicates that the pressure is appropriate on the investigated area. The person on the photo is not one of the subjects in the study.

Mentions: Vibration perception thresholds (VPTs) were measured in the right hand at the pulp of the index and little fingers with a standard VibroSense Meter device. The set up for measuring VPTs on finger pulps was done according to ISO 13091–1, Method A; i.e. without a surround and a contact force of 0.15 ± 0.09 Newton (corresponding to a static skin indent of about 1.5 mm) between the probe and the finger pulp. The probe diameter was 4 mm. The skin contact force was continuously monitored by the operator to make sure that the contact force was within required limits according to ISO 13091–1. During the examination the subject was seated comfortable in a chair (Fig. 1). The examined finger was placed on the vibrating probe, which was covered with a shield to prevent the subject to have a visual contact with the probe. Each examination round started with a test recording at 16 Hz in only one finger; thus, the subject could be acquainted with the procedure. The examination sequence was the index finger followed by the little finger. We only tested VPTs unilaterally since previous studies have not indicated any difference between the right and left side.


Vibrotactile perception in finger pulps and in the sole of the foot in healthy subjects among children or adolescents.

Dahlin LB, Güner N, Elding Larsson H, Speidel T - PLoS ONE (2015)

Photo showing the experimental set-up.The subject is sitting with the arm/hand and leg/foot, respectively in a relaxed position (A). The investigated skin area (index or little finger, head or the first or fifth metatarsal bone or heel) is placed on a vibrating probe (insert). The subject regulates the intensity of the vibration by pressure a button on a remote control (arrow) in his/her contralateral hand (B). The result is a tactilogram (see Fig. 2). The probe for the foot is shown in (C) and the green light (D) indicates that the pressure is appropriate on the investigated area. The person on the photo is not one of the subjects in the study.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4383580&req=5

pone.0119753.g001: Photo showing the experimental set-up.The subject is sitting with the arm/hand and leg/foot, respectively in a relaxed position (A). The investigated skin area (index or little finger, head or the first or fifth metatarsal bone or heel) is placed on a vibrating probe (insert). The subject regulates the intensity of the vibration by pressure a button on a remote control (arrow) in his/her contralateral hand (B). The result is a tactilogram (see Fig. 2). The probe for the foot is shown in (C) and the green light (D) indicates that the pressure is appropriate on the investigated area. The person on the photo is not one of the subjects in the study.
Mentions: Vibration perception thresholds (VPTs) were measured in the right hand at the pulp of the index and little fingers with a standard VibroSense Meter device. The set up for measuring VPTs on finger pulps was done according to ISO 13091–1, Method A; i.e. without a surround and a contact force of 0.15 ± 0.09 Newton (corresponding to a static skin indent of about 1.5 mm) between the probe and the finger pulp. The probe diameter was 4 mm. The skin contact force was continuously monitored by the operator to make sure that the contact force was within required limits according to ISO 13091–1. During the examination the subject was seated comfortable in a chair (Fig. 1). The examined finger was placed on the vibrating probe, which was covered with a shield to prevent the subject to have a visual contact with the probe. Each examination round started with a test recording at 16 Hz in only one finger; thus, the subject could be acquainted with the procedure. The examination sequence was the index finger followed by the little finger. We only tested VPTs unilaterally since previous studies have not indicated any difference between the right and left side.

Bottom Line: Thresholds at 64 and 125 Hz were generally higher at heel compared to metatarsal heads.VPTs in fingers and in feet are different as related to frequency in healthy girls and boys.Multi Frequency Tactilometry is a future valuable method to detect neuropathy in children and adolescents.

View Article: PubMed Central - PubMed

Affiliation: Department of Translational Medicine-Hand Surgery, Lund University, Skåne University Hospital, Malmö, Sweden.

ABSTRACT

Aims: To evaluate vibrotactile perception at different frequencies in fingers and in foot in healthy girls and boys.

Methods: Vibration perception thresholds (VPTs) were measured in 283 healthy (8-20 years), consecutively included, girls (n=146) and boys (n=137); i.e., 269 children after excluding those with diseases or disorders possibly affecting the nervous system. Thresholds were measured in finger pulps of index and little fingers (seven frequencies; 8-500 Hz) and at first and fifth metatarsal head and at heel in the sole of the foot (six frequencies; 8-250 Hz;) using Multi Frequency Tactilometry.

Results: VPTs, divided in six groups by age and gender (i.e., 8-10 years, 11-15 years and 16-20 years), at all three sites in the sole increased with higher frequencies, but without gender differences. Thresholds at 64 and 125 Hz were generally higher at heel compared to metatarsal heads. VPTs in finger pulps of index and little fingers, with no finger differences, had a different pattern with increasing thresholds with frequency, but with lower thresholds at 64 and 125 Hz. Thresholds at lower frequencies were higher in finger pulps, while at higher frequencies VPTs were lower in finger pulps than in the sole of the foot; thus, vibration perception in the sole was better than perception in finger pulps at lower frequencies and opposite at higher frequencies. VPTs were higher among adolescents than in younger children in the foot, while thresholds were lower in the finger pulps among adolescents, particularly in index finger. Thresholds in finger pulps of index and little fingers, particularly at higher frequencies, correlated with each other, which the three sites in the sole also did.

Conclusions: VPTs in fingers and in feet are different as related to frequency in healthy girls and boys. Multi Frequency Tactilometry is a future valuable method to detect neuropathy in children and adolescents.

No MeSH data available.


Related in: MedlinePlus