Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
Painful stimulation and transient blocking of nerve transduction due to local anesthesia evoke perceptual distortions of the face in healthy volunteers. / Skyt, Ina ; Dagsdóttir, Lilja; Vase, Lene; Baad-Hansen, Lene; Castrillon, Eduardo; Roepstorff, Andreas; Jensen, Troels Staehelin; Svensson, Peter.
In: Journal of Pain, Vol. 16, No. 4, 2015, p. 335-345.Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
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TY - JOUR
T1 - Painful stimulation and transient blocking of nerve transduction due to local anesthesia evoke perceptual distortions of the face in healthy volunteers
AU - Skyt, Ina
AU - Dagsdóttir, Lilja
AU - Vase, Lene
AU - Baad-Hansen, Lene
AU - Castrillon, Eduardo
AU - Roepstorff, Andreas
AU - Jensen, Troels Staehelin
AU - Svensson, Peter
N1 - Copyright © 2015 American Pain Society. Published by Elsevier Inc. All rights reserved.
PY - 2015
Y1 - 2015
N2 - Anecdotally, orofacial pain patients sometimes report that the painful face area feels 'swollen'. Because there are no clinical signs of swelling, such illusions may represent perceptual distortions. In this study, we examine whether nociceptive stimulation can lead to perceptual distortion of the face in a way similar to that of local anesthesia. Sixteen healthy participants received injections of 0.4 mL hypertonic saline to induce short-term nociceptive stimulation, 0.4 mL Mepivacain (local anesthetics) to transiently block nerve transduction and 0.4 mL isotonic saline as a control condition. Injections were performed in both the infraorbital and the mental nerve region. Perceptual distortions were conceptualized as perceived changes in magnitude of the injected areas and the lips, and it was measured using 1) a verbal subjective rating scale and 2) a warping procedure. Prior to the study, participants filled in several psychological questionnaires. This study shows that both nociceptive stimulation (p<0.05) and transient blocking of nerve transduction (p<0.05) can lead to perceptual distortion of the face. A test-retest experiment including nine new healthy subjects supported the results. Perceptual distortions were positively correlated with the psychological variable dissociation in several conditions (p<0.05). Perceptual distortions may therefore be influenced by somatosensory changes and psychological mechanisms.PERSPECTIVE: Knowledge of the factors that influence the perception of the face is important to understand the possible implications of perceptual distortions in orofacial pain disorders (and possibly other chronic pain states). Such information may ultimately open up for new treatment strategies for persistent orofacial pain.
AB - Anecdotally, orofacial pain patients sometimes report that the painful face area feels 'swollen'. Because there are no clinical signs of swelling, such illusions may represent perceptual distortions. In this study, we examine whether nociceptive stimulation can lead to perceptual distortion of the face in a way similar to that of local anesthesia. Sixteen healthy participants received injections of 0.4 mL hypertonic saline to induce short-term nociceptive stimulation, 0.4 mL Mepivacain (local anesthetics) to transiently block nerve transduction and 0.4 mL isotonic saline as a control condition. Injections were performed in both the infraorbital and the mental nerve region. Perceptual distortions were conceptualized as perceived changes in magnitude of the injected areas and the lips, and it was measured using 1) a verbal subjective rating scale and 2) a warping procedure. Prior to the study, participants filled in several psychological questionnaires. This study shows that both nociceptive stimulation (p<0.05) and transient blocking of nerve transduction (p<0.05) can lead to perceptual distortion of the face. A test-retest experiment including nine new healthy subjects supported the results. Perceptual distortions were positively correlated with the psychological variable dissociation in several conditions (p<0.05). Perceptual distortions may therefore be influenced by somatosensory changes and psychological mechanisms.PERSPECTIVE: Knowledge of the factors that influence the perception of the face is important to understand the possible implications of perceptual distortions in orofacial pain disorders (and possibly other chronic pain states). Such information may ultimately open up for new treatment strategies for persistent orofacial pain.
U2 - 10.1016/j.jpain.2015.01.006
DO - 10.1016/j.jpain.2015.01.006
M3 - Journal article
C2 - 25640293
VL - 16
SP - 335
EP - 345
JO - Journal of Pain
JF - Journal of Pain
SN - 1526-5900
IS - 4
ER -