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Combining neurofeedback with source estimation: Evaluation of an sLORETA neurofeedback protocol for chronic tinnitus treatment.
Restorative Neurology and Neuroscience ( IF 1.9 ) Pub Date : 2020-07-14 , DOI: 10.3233/rnn-200992
Dominik Güntensperger 1 , Tobias Kleinjung 2 , Patrick Neff 1, 3, 4 , Christian Thüring 2 , Martin Meyer 1, 5, 6
Affiliation  

Abstract

Background:

Alpha/delta neurofeedback has been shown to be a potential treatment option for chronic subjective tinnitus. Traditional neurofeedback approaches working with a handful of surface electrodes have been criticized, however, due to their low spatial specificity.

Objective:

The purpose of this study was to evaluate an innovative tomographic neurofeedback protocol that combines neural activity measured across the whole scalp with sLORETA source estimation.

Methods:

Forty-eight tinnitus patients participated in 15 neurofeedback training sessions as well as extensive pre, post, and follow-up testing. Patients were randomly assigned to either a tomographic (TONF) or a traditional electrode-based neurofeedback (NTNF) group. Main outcome measures of this study were defined as tinnitus-related distress measured with the Tinnitus Handicap Inventory (THI) and Tinnitus Questionnaire (TQ), tinnitus loudness, and resting-state EEG activity in trained frequency bands.

Results:

For both groups a significant reduction of tinnitus-related distress and tinnitus loudness was found. While distress changes remained persistent irrespective of group, loudness levels returned to baseline in the follow-up period. No significant between-group differences between the 2 neurofeedback applications (TONF vs. NTNF) were found, which suggests a similar contribution to symptom improvement. The trained alpha/delta ratio increased significantly over the course of the training and remained stable in the follow-up period. This effect was found irrespective of group on both surface and source levels with no meaningful differences between the 2 groups.

Conclusions:

Our study shows that a tomographic alpha/delta protocol should be considered a promising addition to tinnitus treatment but that more individually specific neurofeedback protocols should be developed.



中文翻译:

将神经反馈与源估计相结合:评估用于慢性耳鸣的sLORETA神经反馈方案。

摘要

背景:

阿尔法/三角神经反馈已被证明是慢性主观耳鸣的潜在治疗选择。然而,由于它们的低空间特异性,已经批评了使用少数表面电极的传统神经反馈方法。

目的:

这项研究的目的是评估一种创新的断层扫描神经反馈方案,该方案将整个头皮上测得的神经活动与sLORETA来源估计结合起来。

方法:

48名耳鸣患者参加了15次神经反馈训练课程,以及广泛的术前,术后和随访测试。将患者随机分配到断层扫描(TONF)或传统的基于电极的神经反馈(NTNF)组。这项研究的主要结局指标被定义为通过耳鸣残障量表(THI)和耳鸣问卷(TQ)测量的耳鸣相关困扰,耳鸣响度和训练频段内的静息状态EEG活动。

结果:

对于两组,都发现与耳鸣有关的困扰和耳鸣响度明显降低。尽管无论组别如何,遇险变化都持续存在,但在随访期间响度水平恢复到基线。在两种神经反馈应用(TONF与NTNF)之间未发现组间显着差异,这表明对症状改善的相似贡献。在训练过程中,训练后的alpha /δ比值显着增加,并在后续期间保持稳定。无论表面和来源水平如何,都发现了这种效果,两组之间没有有意义的差异。

结论:

我们的研究表明,层析α/δ方案应被认为是耳鸣治疗的有前途的补充,但应开发更个别的特定神经反馈方案。

更新日期:2020-07-16
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