Independent responses of Pacinian and non-Pacinian systems with hand-transmitted vibration detected from masked thresholds
Independent responses of Pacinian and non-Pacinian systems with hand-transmitted vibration detected from masked thresholds
This study was designed to identify psychophysical channels responsible for the detection of hand-transmitted vibration. Perception thresholds for vibration (16, 31.5, 63 and 125 Hz sinusoidal for 600 ms) at the distal phalanx of the middle finger and the whole hand were determined with and without simultaneous masking stimuli (1/3 octave bandwidth Gaussian random vibration centered on either 16 Hz or 125 Hz for 3000 ms, varying in magnitude 0 to 30 dB above threshold). At all frequencies from 16 to 125 Hz, absolute thresholds for the hand were significantly lower than those for the finger. Changes in threshold as a function of masker level were used to estimate the thresholds of three psychophysical channels (i.e. P, NP I, and NP II channels). Increased vibrotactile sensitivity of the hand compared to the finger seems to be not entirely due to increased spatial summation via the Pacinian system (P channel); non-Pacinian system (NP I and NP II channels) also contributed to perception. Differing transmission of vibration between the hand and the finger may have also influenced the thresholds.
69-84
Morioka, Miyuki
8eb26aca-8773-4e45-8737-61c2438d30d9
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
2005
Morioka, Miyuki
8eb26aca-8773-4e45-8737-61c2438d30d9
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Morioka, Miyuki and Griffin, Michael J.
(2005)
Independent responses of Pacinian and non-Pacinian systems with hand-transmitted vibration detected from masked thresholds.
Somatosensory & Motor Research, 22 (1-2), .
(doi:10.1080/08990220500084644).
Abstract
This study was designed to identify psychophysical channels responsible for the detection of hand-transmitted vibration. Perception thresholds for vibration (16, 31.5, 63 and 125 Hz sinusoidal for 600 ms) at the distal phalanx of the middle finger and the whole hand were determined with and without simultaneous masking stimuli (1/3 octave bandwidth Gaussian random vibration centered on either 16 Hz or 125 Hz for 3000 ms, varying in magnitude 0 to 30 dB above threshold). At all frequencies from 16 to 125 Hz, absolute thresholds for the hand were significantly lower than those for the finger. Changes in threshold as a function of masker level were used to estimate the thresholds of three psychophysical channels (i.e. P, NP I, and NP II channels). Increased vibrotactile sensitivity of the hand compared to the finger seems to be not entirely due to increased spatial summation via the Pacinian system (P channel); non-Pacinian system (NP I and NP II channels) also contributed to perception. Differing transmission of vibration between the hand and the finger may have also influenced the thresholds.
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MoriokaGriffin_TAW346 AUTHOR ACCEPTED MANUSCRIPT
- Accepted Manuscript
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Published date: 2005
Organisations:
Human Sciences Group
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Local EPrints ID: 28071
URI: http://eprints.soton.ac.uk/id/eprint/28071
ISSN: 0899-0220
PURE UUID: e98f24ac-197d-482e-accc-e8229713e9ae
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Date deposited: 28 Apr 2006
Last modified: 15 Mar 2024 07:23
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Author:
Miyuki Morioka
Author:
Michael J. Griffin
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