Transcranial Direct Current Stimulation (tDCS) and Language/Speech: Can Patients Benefit from a Combined Therapeutic Approach?

Vandenborre, Dorien; Wilssens, Ineke; Dun, Kim van; Manto, Mario

doi:10.1007/978-3-030-35687-3_6

Cited by 4 publications

(2 citation statements)

References 196 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In line with tDCS studies in other domains, tDCS studies in PPA have adopted a variety of protocols, leaving some methodological questions about the use of tDCS unanswered. Many different parameters are known to determine the behavioral effects of tDCS, including electrode size and positioning, dosage, polarity, intensity, frequency, and duration (Thair et al, 2017;Vandenborre et al, 2020). Evaluating interactions between these parameters and sorting out their individual effects on behavior outcome, is a complex endeavor.…”

Section: Tdcs In Ppamentioning

confidence: 99%

A Systematic Review of Transcranial Direct Current Stimulation in Primary Progressive Aphasia: Methodological Considerations

Coemans

Struys

Vandenborre³

et al. 2021

Front. Aging Neurosci.

Self Cite

View full text Add to dashboard Cite

A variety of tDCS approaches has been used to investigate the potential of tDCS to improve language outcomes, or slow down the decay of language competences caused by Primary Progressive Aphasia (PPA). The employed stimulation protocols and study designs in PPA are generally speaking similar to those deployed in post-stroke aphasic populations. These two etiologies of aphasia however differ substantially in their pathophysiology, and for both conditions the optimal stimulation paradigm still needs to be established. A systematic review was done and after applying inclusion and exclusion criteria, 15 articles were analyzed focusing on differences and similarities across studies especially focusing on PPA patient characteristics (age, PPA variant, language background), tDCS stimulation protocols (intensity, frequency, combined therapy, electrode configuration) and study design as recent reviews and group outcomes for individual studies suggest tDCS is an effective tool to improve language outcomes, while methodological approach and patient characteristics are mentioned as moderators that may influence treatment effects. We found that studies of tDCS in PPA have clinical and methodological and heterogeneity regarding patient populations, stimulation protocols and study design. While positive group results are usually found irrespective of these differences, the magnitude, duration and generalization of these outcomes differ when comparing stimulation locations, and when results are stratified according to the clinical variant of PPA. We interpret the results of included studies in light of patient characteristics and methodological decisions. Further, we highlight the role neuroimaging can play in study protocols and interpreting results and make recommendations for future work.

show abstract

Section: Tdcs In Ppamentioning

confidence: 99%

A Systematic Review of Transcranial Direct Current Stimulation in Primary Progressive Aphasia: Methodological Considerations

Coemans

Struys

Vandenborre³

et al. 2021

Front. Aging Neurosci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In comparison to TMS and other types of non-invasive brain stimulation, tDCS is relatively popular due to its safety profile, portability, and cost-effectiveness [ 11 ]. Also, tDCS is a user-friendly technique that offers painless cortical excitability without significant side effects [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Transcranial direct current stimulation over the primary motor cortex improves speech production in post-stroke dysarthric speakers: A randomized pilot study

Wong

Baig²,

Chan³

et al. 2022

PLoS ONE

View full text Add to dashboard Cite

Purpose The current study investigated the therapeutic potential of transcranial direct current stimulation (tDCS) on speech intelligibility, speech-related physiological and vocal functions among post-stroke dysarthric patients. Method Nine chronic post-stroke dysarthric patients were randomly assigned to the stimulation or sham group. The stimulation group received 2mA of anodal tDCS over the left inferior primary motor cortex for 15 minutes, while the sham group received 30s of stimulation under the same settings. All the participants received 10 daily 15 minutes of individualized speech therapy targeting their dominant phonological process or phonemes with the greatest difficulty. The outcome measures included (1) perceptual analysis of single words, passage reading and diadochokinetic rate, (2) acoustic analysis of a sustained vowel, and (3) kinematic analysis of rapid syllable repetitions and syllable production in sentence, conducted before and after the treatment. Results The results revealed that both the stimulation and sham groups had improved perceptual speech intelligibility at the word level, reduced short rushes of speech during passage reading, improved rate during alternating motion rate, AMR-kha1, and improved articulatory kinematics in AMR-tha1 and syllables /tha1/ and /kha1/ production in sentence. Compared to the sham group, the stimulation group showed significant improvement in articulatory kinematics in AMR-kha1 and syllable /kha1/ production in sentence. The findings also showed that anodal stimulation led to reduced shimmer value in sustained vowel /a/ phonation, positive changes in articulatory kinematics in AMR-tha1 and syllables /pha1/ and /kha1/ production in sentence at the post treatment measure. In addition to positive effects on articulatory control, reduced perturbation of voice amplitude documented in the stimulation group post treatment suggests possible tDCS effects on the vocal function. Conclusions The current study documented the beneficial effects of anodal tDCS over the primary motor cortex on speech production and suggested that combined tDCS and speech therapy may promote recovery from post-stroke dysarthria.

show abstract

Transcranial direct current stimulation on speech intelligibility and acoustic analysis in Parkinson’s disease: a pilot study

Rossini Peters,

Cielo,

Pagliarin

2024

Journal of Clinical Practice in Speech-Language Pathology

View full text Add to dashboard Cite

Transcranial Direct Current Stimulation (tDCS) and Language/Speech: Can Patients Benefit from a Combined Therapeutic Approach?

Cited by 4 publications

References 196 publications

A Systematic Review of Transcranial Direct Current Stimulation in Primary Progressive Aphasia: Methodological Considerations

A Systematic Review of Transcranial Direct Current Stimulation in Primary Progressive Aphasia: Methodological Considerations

Transcranial direct current stimulation over the primary motor cortex improves speech production in post-stroke dysarthric speakers: A randomized pilot study

Transcranial direct current stimulation on speech intelligibility and acoustic analysis in Parkinson’s disease: a pilot study

Contact Info

Product

Resources

About