Utility of square-wave gratings to assess perioral spatial acuity

Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons
J PatelD G Kelly

Abstract

The usefulness of square-wave gratings to assess perioral spatial resolution acuity was evaluated. A psychophysical tracking procedure was used to estimate the threshold groove width for discriminating orientation (horizontal or vertical) of square-wave gratings pressed into the skin. Ten positionally matched sites on the two sides of the face of 36 right-handed, healthy young adults were studied. Commercially available gratings provided alternating ridge- and-groove stimuli with element widths from 0.35 to 3.0 mm. Thirty-three of the 36 subjects could discriminate orientation at all six sites on the vermilion (threshold width averaged 1.06 mm for grooves and for ridges). Thresholds were lower on the mid-portion of the lower vermilion than on the mid-portion of the upper vermilion (P < .05). Moreover, thresholds were lower on the right side of the vermilion than on the left side (P < .02). In contrast to the vermilion, only 25 and 30 subjects could discriminate orientation on the left and right hairy upper lip, respectively; and two or fewer subjects, at each of 12 sites on the chin and cheeks. Clinical use of small square-wave gratings with ridge and groove widths of 3 mm or smaller is limited to the vermilion. Moreover, basel...Continue Reading

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Citations

Nov 25, 2005·Experimental Brain Research·Gregory O Gibson, James C Craig
Apr 30, 2008·Experimental Brain Research·James C CraigSliman J Bensmaia
Mar 13, 1999·Annual Review of Psychology·J C Craig, G B Rollman
Jan 8, 2008·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·Greg K EssickCarroll-Ann Trotman
Jan 7, 2006·Perception & Psychophysics·Gregory O Gibson, James C Craig
Apr 3, 2001·Perception & Psychophysics·J C Craig, K B Lyle
Dec 20, 2002·Perception & Psychophysics·Gregory O Gibson, James C Craig
Jan 19, 2011·Journal of Oral Rehabilitation·P SvenssonUNKNOWN Special Interest Group of Oro-facial Pain
Mar 26, 2003·International Journal of Oral and Maxillofacial Surgery·T Teerijoki-OksaH Forssell
Feb 18, 2012·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Gabrielle Todd
Nov 11, 1999·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·G K EssickD G Kelly
Mar 15, 2005·Somatosensory & Motor Research·Greg EssickFrancis McGlone

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