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Facilitatory Effect of Intermittent Repetitive Transcranial Magnetic Stimulation on Perceptual Distortion of the Face. / Kothari, Simple F.; Blicher, Jakob; Dagsdóttir, Lilja Kristin et al.
I: Journal of Pain, Bind 23, Nr. 6, 06.2022, s. 1051-1059.Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review
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TY - JOUR
T1 - Facilitatory Effect of Intermittent Repetitive Transcranial Magnetic Stimulation on Perceptual Distortion of the Face
AU - Kothari, Simple F.
AU - Blicher, Jakob
AU - Dagsdóttir, Lilja Kristin
AU - Kothari, Mohit
AU - Kumar, Abhishek
AU - Sengupta, Kaushik
AU - Buchholtz, Poul Erik
AU - Ashkanian, Mahmoud
AU - Svensson, Peter
PY - 2022/6
Y1 - 2022/6
N2 - Orofacial pain patients often report that the painful facial area is “swollen” without clinical signs - known as perceptual distortion (PD). The neuromodulatory effect of facilitatory repetitive transcranial magnetic stimulation (rTMS) on PD in healthy individuals was investigated, to provide further support that the primary somatosensory cortex (SI) is involved in facial PD. Participants were allocated to active (n=26) or sham (n=26) rTMS group in this case-control study. PD was induced experimentally by injecting local anesthesia (LA) in the right infraorbital region. PD was measured at baseline, 6 min after LA, immediately, 20 and 40 min after rTMS. Intermittent theta-burst stimulation (iTBS) as active rTMS and sham rTMS was applied to the face representation area of SI at 10 min after LA. The magnitude of PD was compared between the groups. The magnitude of PD significantly increased immediately after iTBS compared with sham rTMS (P=0.009). The PD was significantly higher immediately after iTBS compared to 6 min after LA (P=0.004) in the active rTMS group, but not in the sham rTMS group (P=0.054). iTBS applied to a somatotopic-relevant cortical region appears to facilitate facial PD further supporting the involvement of SI in the processing of one´s own face and PD.
AB - Orofacial pain patients often report that the painful facial area is “swollen” without clinical signs - known as perceptual distortion (PD). The neuromodulatory effect of facilitatory repetitive transcranial magnetic stimulation (rTMS) on PD in healthy individuals was investigated, to provide further support that the primary somatosensory cortex (SI) is involved in facial PD. Participants were allocated to active (n=26) or sham (n=26) rTMS group in this case-control study. PD was induced experimentally by injecting local anesthesia (LA) in the right infraorbital region. PD was measured at baseline, 6 min after LA, immediately, 20 and 40 min after rTMS. Intermittent theta-burst stimulation (iTBS) as active rTMS and sham rTMS was applied to the face representation area of SI at 10 min after LA. The magnitude of PD was compared between the groups. The magnitude of PD significantly increased immediately after iTBS compared with sham rTMS (P=0.009). The PD was significantly higher immediately after iTBS compared to 6 min after LA (P=0.004) in the active rTMS group, but not in the sham rTMS group (P=0.054). iTBS applied to a somatotopic-relevant cortical region appears to facilitate facial PD further supporting the involvement of SI in the processing of one´s own face and PD.
U2 - 10.1016/j.jpain.2021.12.013
DO - 10.1016/j.jpain.2021.12.013
M3 - Journal article
C2 - 35041936
VL - 23
SP - 1051
EP - 1059
JO - Journal of Pain
JF - Journal of Pain
SN - 1526-5900
IS - 6
ER -