Characterization of sex-based differences in the mechanical properties of human finger glabrous tissue using a fiberoptic sensor

Lalit Venkatesan, Steven M Barlow

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

TAC-Cell is a custom-built somatosensory stimulator that delivers pneumatic cutaneous tactile inputs to virtually any skin target on the body and by virtue of its non-ferrous materials is compatible with functional magnetic resonance imaging (fMRI) and magnetoencephalography (MEG) brain scanners. In this study, we describe the method to measure apparent skin displacement induced by TAC-Cell stimulation of the glabrous surface of the distal phalanx of the index finger. Specifically, we studied the effect of four servo controller input voltages (0.4 V-1.0 V) on resultant skin displacement among eighteen, neurotypical adult male and female participants. A fiberoptic displacement sensor, commonly used in industrial applications, was coupled to the TAC-Cell to measure the glabrous skin's kinematic response to different stimulus amplitudes. Skin displacement was significantly dependent on stimulus amplitudes and sex (p<0.0001). Power spectrum and kinematic analysis of skin displacement showed that the pneumatic TAC-Cell stimulus consists of a spectrally rich, high velocity signal. In related work, we have shown that this dynamic pneumocutaneous stimulus is highly effective in evoking a cortical brain response for neurodiagnostic applications and somatosensory pathway analysis in health and disease.

Original languageEnglish (US)
Pages (from-to)2257-2262
Number of pages6
JournalJournal of Biomechanics
Volume47
Issue number10
DOIs
StatePublished - Jul 18 2014

Fingerprint

Sex Characteristics
Fingers
Skin
Tissue
Mechanical properties
Sensors
Pneumatics
Brain
Biomechanical Phenomena
Kinematics
Magnetoencephalography
Finger Phalanges
Power spectrum
Touch
Industrial applications
Health
Spectrum Analysis
Magnetic Resonance Imaging
Controllers
Electric potential

Keywords

  • Glabrous skin
  • Human
  • Pneumatic
  • Somatosensory
  • Stimulation
  • Tactile

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation

Cite this

Characterization of sex-based differences in the mechanical properties of human finger glabrous tissue using a fiberoptic sensor. / Venkatesan, Lalit; Barlow, Steven M.

In: Journal of Biomechanics, Vol. 47, No. 10, 18.07.2014, p. 2257-2262.

Research output: Contribution to journalArticle

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