Multisensory modulation of experimentally evoked perceptual distortion of the face

Dagsdóttir, Lilja K.; Bellan, Valeria; Skyt, Ina; Vase, Lene; Castrillón, Eduardo; Svensson, Peter

doi:10.1111/joor.12581

Cited by 8 publications

(15 citation statements)

References 44 publications

(55 reference statements)

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“…With international consensus, sleep bruxism was defined as masticatory muscle activity during sleep that is characterized as rhythmic (phasic) or non-rhythmic (tonic) and is not a movement disorder or a sleep disorder in otherwise healthy individuals [ 2 ]. In the past, occlusal imbalance was considered as the primary etiological factor for bruxism; thus, dentists used to indicate occlusal adjustment [ 3 ] or occlusal stabilization splints [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Intensity of Sleep Bruxism in Arterial Hypertension

Martynowicz

Dymczyk

Dominiak

et al. 2018

JCM

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Sleep bruxism (SB) is a masticatory muscle activity during sleep that is characterized as rhythmic (phasic) or non-rhythmic (tonic). The recent hypothesis on the etiology of SB supports the role of the central and autonomic nervous systems. Therefore, in this study, we aimed to assess the intensity of SB in patients with arterial hypertension. A total of 70 adults participated in this study: 35 patients with hypertension (study group) and 35 normotensive subjects (control group). Data were recorded using home portable cardiorespiratory polygraphy. The bruxism episode index (BEI) in the study group was found to be significantly higher compared to the control group (3.4 ± 3.25 vs. 2.35 ± 2.29, p = 0.04). Hypertension, higher body mass index (BMI), lower values of mean oxygen saturation (SpO2), and a higher percentage of SpO2 < 90% constituted independent risk factors for increased BEI. These results suggest the need for special oral care in hypertensive patients, patients with higher BMI, lower values of SpO2 and a higher percentage of SpO2 < 90%.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Intensity of Sleep Bruxism in Arterial Hypertension

Martynowicz

Dymczyk

Dominiak

et al. 2018

JCM

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“…swollenness/ increase or reduction/decrease) in the participant's midface corresponding to the infraorbital nerve region involving the upper lip compared with the unaffected contralateral side [11]. A verbal numerical rating scale (VNRS) ranging from À100% through 0% to þ100%, where 0% ¼ "no size change", À100% ¼ "half the size" and þ100% ¼ "double the size" compared to the non-affected contralateral side of the face was used to rate the PD of the affected face area [11,13]. Further, to confirm the location of PD, the participants were asked to mark/map the area affected by PD on an outlined face drawing (Fig.…”

Section: Experimentally Evoked Perceptual Distortionmentioning

confidence: 99%

“…It is a key feature in showing and detecting emotions [10] and facilitating normal social and sensory interactions. Furthermore, dynamic integration of multisensory inputs is crucial for our perception and identification of our own face [11]. Thus, PD is considered as a multisensory phenomenon [11].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, dynamic integration of multisensory inputs is crucial for our perception and identification of our own face [11]. Thus, PD is considered as a multisensory phenomenon [11]. Orofacial pain patients often report that the painful facial area is "swollen" or "feels differently" [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…It is postulated that cortical reorganization of the primary somatosensory cortex (SI) is an associated factor [4,15,16]. The robustness of PD of the face have been illustrated experimentally by Dagsd ottir et al, by transiently blocking nerve transduction using local anesthetics (LA) in the orofacial region [11,13,14].…”

Section: Introductionmentioning

confidence: 99%

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Effect of repetitive transcranial magnetic stimulation on altered perception of One’s own face

et al. 2020

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Background: Chronic orofacial pain (COP) patients often perceive the painful face area as "swollen" without clinical signs; such self-reported illusions of the face are termed perceptual distortion (PD). The pathophysiological mechanisms underlying PD remain elusive. Objective: To test the neuromodulatory effect of repetitive transcranial magnetic stimulation (rTMS) on PD in healthy individuals, to gain insight into the cortical mechanisms underlying PD. Methods: PD was induced experimentally by injections of local anesthetic (LA) around the infraorbital nerve and measured as perceived size changes of the affected area. Participants were randomly allocated to inhibitory rTMS (n ¼ 26) or sham rTMS (n ¼ 26) group. The participants rated PD at baseline, 6 min after LA, immediately, 20 and 40 min after rTMS. The rTMS (inhibitory and sham) was applied to face (lip) representation area of primary somatosensory cortex (SI) as an intervention at 10 min after the LA, when the magnitude of PD is large. As inhibitory rTMS, continuous theta-burst stimulation paradigm (50 Hz) for 40s was employed to inhibit cortical activity. Results: We demonstrated a significant decrease in the magnitude of PD immediately and 20 min after the application of inhibitory rTMS compared with sham rTMS (P < 0.006). In two control experiments, we also showed that peripheral muscle stimulation and stimulation of a cortical region other than the lip representation area had no effect on the magnitude of the PD. Conclusions: Inhibitory rTMS applied to a somatotopical-relevant cortical region modulates PD of the face in healthy individuals and could potentially have therapeutic implications for COP patients.

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Brain Mechanisms of Oral Sensory Functions

2021

Dental Neuroimaging

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Multisensory modulation of experimentally evoked perceptual distortion of the face

Abstract: SummaryBackground: Chronic oro-facial pain patients often perceive the painful face area as

Cited by 8 publications

References 44 publications

Evaluation of Intensity of Sleep Bruxism in Arterial Hypertension

Evaluation of Intensity of Sleep Bruxism in Arterial Hypertension

Effect of repetitive transcranial magnetic stimulation on altered perception of One’s own face

Brain Mechanisms of Oral Sensory Functions

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