Using Digital Image Correlation to Quantify Skin Deformation With Von Frey Monofilaments.

ABSTRACT: Thin von Frey monofilaments are a clinical tool used worldwide to assess touch deficits. One's ability to perceive touch with low-force monofilaments (0.008 - 0.07 g) establishes an absolute threshold and thereby the extent of impairment. While individual monofilaments bend at defined forces, there are no empirical measurements of the skin surface's response. In this work, we measure skin surface deformation at light-touch perceptual limits, by adopting an imaging approach using 3D digital image correlation (DIC). Generating point cloud data from three cameras surveilling the index finger pad, we reassemble and stitch together multiple 3D surfaces. Then, in response to each monofilament's indentation over time, we quantify strain across the skin surface, radial deformation emanating from t

SUBMITTER: Kao AR 

PROVIDER: S-EPMC9006180 | biostudies-literature | 2022 Jan-Mar

REPOSITORIES: biostudies-literature