Speech and language therapy for dysarthria due to non-progressive brain damage

Neuroanatomical regions associated with non-progressive dysarthria post-stroke: a systematic review

Background

Dysarthria is a common and persisting sequela to stroke. It can have a negative influence on psychological wellbeing, and quality of life. This systematic review aimed to describe and identify the neuroanatomical regions associated with non-progressive dysarthria following stroke.

Methods

A systematic search of PubMed, Ovid Medline, CINAHL, Cochrane, Scopus, and ScienceDirect was conducted to identify all relevant articles published in peer-reviewed journals up to December 2021. Following data extraction, the National Institutes of Health (NIH) quality assessment tools were used to evaluate the methodological quality of the included studies.

Results

Out of 2186 papers found in the literature related to dysarthria post-stroke, 24 met the inclusion criteria. Eligible articles assessed 1150 post-stroke subjects. Out of them, 420 subjects had dysarthria from isolated lesions. Regarding dysarthric subjects with ischemic strokes, 153 sustained supratentorial infarctions, while 267 had infratentorial infarctions. The majority had pontine infarctions (n = 142), followed by infarctions in the corona radiata (n = 104), and the cerebellum (n = 64).

Conclusion

This systematic review is the first step toward establishing a neuroanatomical model of dysarthria throughout the whole brain. Our findings have many implications for clinical practice and provide a framework for implementing guidelines for early detection and management of dysarthria post-stroke.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12883-022-02877-x.

Assessment of non-progressive dysarthria: practice and attitude of speech and language therapists in Lebanon

BACKGROUND

Non-progressive dysarthria is an acquired motor speech disorder resulting from neurological diseases such as stroke and traumatic brain injury. The evidence base for the assessment of non-progressive dysarthria remains limited with professional practices relying mainly on therapists' clinical experience. Limited information on the assessment practices of Lebanese speech and language therapists (SLTs) is available. Such information is crucial for the development of adequate therapy services for clients with non-progressive dysarthria. This study aims to explore the assessment practices and attitudes of Lebanese SLTs working with adults with non-progressive dysarthria and to investigate their adherence to the framework of the World Health Organization's International Classification of Functioning, Disability and Health (ICF).

METHODS

A cross-sectional study was conducted in Lebanon between March and May 2021. Data was collected through an online survey that included information on socio-demographic characteristics, practices, and attitudes of SLTs who assess adults with non-progressive dysarthria.

RESULTS

A total of 50 Lebanese SLTs responded to the survey. The majority of SLTs (78%) assessed clients with non-progressive dysarthria across all ICF domains. SLTs reported dissatisfaction with the available assessment tools (64%) and reliance on informal tools (84%). In addition, 68% of the SLTs suggested the crucial need for the development of Arabic formal assessments that can quantitatively evaluate dysarthria and determine severity. The survey also showed that the respondents demonstrated a preference for the use of impairment-based tools.

CONCLUSION

It can be concluded that the assessment practices of Lebanese SLTs, generally, follow the international trend and the recommended professional guidelines. Further research initiatives should be held to develop Arabic formal assessment tools for non-progressive dysarthria.

Characterizing language outcomes following childhood basal ganglia stroke

The basal ganglia are important for movement and executive function, but its contribution to language is less understood. This study explored language outcomes associated with childhood basal ganglia stroke. A detailed language coding scheme, which examined expressive and receptive language, verbal fluency, narrative discourse, pragmatic/applied language, and academics, was developed from qualitative and quantitative data acquired from neuropsychological testing and reports. Overall intellectual functioning and verbal comprehension was in the average range. Twelve participants had psychological diagnoses, including Learning Disorder. No one had a Language Disorder diagnosis. Among the 18 children who did not receive a diagnosis, many exhibited language issues in the mild to severe range according to our coding scheme. These children had higher-order language difficulties in verbal fluency, narrative, and pragmatic language rather than overt expressive difficulties noted in Diagnostic and Statistical Manual (DSM) diagnostic criteria. There was an association between infarct size and ESL/immersion education, math performance, and presence of a psychological diagnosis. Psychological diagnosis was also associated with literacy skills. The results highlight that language issues following basal ganglia stroke may not be fully captured by standardized neuropsychological tests and psychological diagnoses. Findings reinforce the need to integrate quantitative and qualitative findings when examining language functioning.

ReaDySpeech for people with dysarthria after stroke: protocol for a feasibility randomised controlled trial

BACKGROUND

Dysarthria, a disordered speech production resulting from neuro-muscular impairment, is a common symptom after stroke. It causes significant problems for patients' speech intelligibility, communication, psychological well-being, social engagement and stroke recovery. Rehabilitation for dysarthria is variable in quality, intensity and duration, which may be, in part, due to the lack of good quality evidence. An online therapy programme, ReaDySpeech, has the potential to improve quality, intensity and duration of speech rehabilitation and was considered in a proof-of-concept study to be acceptable to speech and language therapists and patients which warranted further evaluation. The present study aims to examine the feasibility of running a trial using the ReaDySpeech intervention.

METHODS/DESIGN

A feasibility, randomised controlled trial, will recruit a minimum of 36 people with post-stroke dysarthria who are more than 1 week post stroke. Participants will be externally randomised in a 2:1 ratio to receive either ReaDySpeech and usual care (24 participants) or usual care only (12 participants). This study is single blind with the researcher carrying out the baseline and outcome measures while blinded to treatment allocation. The primary objective is to assess the feasibility of conducting a larger Phase III trial. The specific objectives are to determine the following: recruitment rate and reasons for non-recruitment; loss of participants to follow-up; acceptability of randomisation; adherence to the intervention; delivery of ReaDySpeech and content; acceptability of outcome measures; success of blinding strategies; defining 'usual' care; and the implications of the intervention for the patient/family/carer.

DISCUSSION

This study will involve a regional, multi-centre, randomised controlled feasibility trial of a complex intervention in order to evaluate whether a Phase III randomised controlled trial is feasible.

TRIAL REGISTRATION

Current Controlled Trials, ISRCTN84996500.

Interventions for dysarthria due to stroke and other adult-acquired, non-progressive brain injury

BACKGROUND

Dysarthria is an acquired speech disorder following neurological injury that reduces intelligibility of speech due to weak, imprecise, slow and/or unco-ordinated muscle control. The impact of dysarthria goes beyond communication and affects psychosocial functioning. This is an update of a review previously published in 2005. The scope has been broadened to include additional interventions, and the title amended accordingly.

OBJECTIVES

To assess the effects of interventions to improve dysarthric speech following stroke and other non-progressive adult-acquired brain injury such as trauma, infection, tumour and surgery.

SEARCH METHODS

We searched the Cochrane Stroke Group Trials Register (May 2016), CENTRAL (Cochrane Library 2016, Issue 4), MEDLINE, Embase, and CINAHL on 6 May 2016. We also searched Linguistics and Language Behavioral Abstracts (LLBA) (1976 to November 2016) and PsycINFO (1800 to September 2016). To identify further published, unpublished and ongoing trials, we searched major trials registers: WHO ICTRP, the ISRCTN registry, and ClinicalTrials.gov. We also handsearched the reference lists of relevant articles and contacted academic institutions and other researchers regarding other published, unpublished or ongoing trials. We did not impose any language restrictions.

SELECTION CRITERIA

We selected randomised controlled trials (RCTs) comparing dysarthria interventions with 1) no intervention, 2) another intervention for dysarthria (this intervention may differ in methodology, timing of delivery, duration, frequency or theory), or 3) an attention control.

DATA COLLECTION AND ANALYSIS

Three review authors selected trials for inclusion, extracted data, and assessed risk of bias. We attempted to contact study authors for clarification and missing data as required. We calculated standardised mean difference (SMD) and 95% confidence interval (CI), using a random-effects model, and performed sensitivity analyses to assess the influence of methodological quality. We planned to conduct subgroup analyses for underlying clinical conditions.

MAIN RESULTS

We included five small trials that randomised a total of 234 participants. Two studies were assessed as low risk of bias; none of the included studies were adequately powered. Two studies used an attention control and three studies compared to an alternative intervention, which in all cases was one intervention versus usual care intervention. The searches we carried out did not find any trials comparing an intervention with no intervention. The searches did not find any trials of an intervention that compared variations in timing, dose, or intensity of treatment using the same intervention. Four studies included only people with stroke; one included mostly people with stroke, but also those with brain injury. Three studies delivered interventions in the first few months after stroke; two recruited people with chronic dysarthria. Three studies evaluated behavioural interventions, one investigated acupuncture and another transcranial magnetic stimulation. One study included people with dysarthria within a broader trial of people with impaired communication.Our primary analysis of a persisting (three to nine months post-intervention) effect at the activity level of measurement found no evidence in favour of dysarthria intervention compared with any control (SMD 0.18, 95% CI -0.18 to 0.55; 3 trials, 116 participants, GRADE: low quality, I² = 0%). Findings from sensitivity analysis of studies at low risk of bias were similar, with a slightly wider confidence interval and low heterogeneity (SMD 0.21, 95% CI -0.30 to 0.73, I² = 32%; 2 trials, 92 participants, GRADE: low quality). Subgroup analysis results for stroke were similar to the primary analysis because few non-stroke participants had been recruited to trials (SMD 0.16, 95% CI -0.23 to 0.54, I² = 0%; 3 trials, 106 participants, GRADE: low quality).Similar results emerged from most of the secondary analyses. There was no evidence of a persisting effect at the impairment (SMD 0.07, 95% CI -0.91 to 1.06, I² = 70%; 2 trials, 56 participants, GRADE: very low quality) or participation level (SMD -0.11, 95% CI -0.56 to 0.33, I² = 0%; 2 trials, 79 participants, GRADE: low quality) but substantial heterogeneity on the former. Analyses of immediate post-intervention outcomes provided no evidence of any short-term benefit on activity (SMD 0.29, 95% CI -0.07 to 0.66, I² = 0%; 3 trials, 117 participants, GRADE: very low quality); or participation (SMD -0.24, 95% CI -0.94 to 0.45; 1 study, 32 participants) levels of measurement.There was a statistically significant effect favouring intervention at the immediate, impairment level of measurement (SMD 0.47, 95% CI 0.02 to 0.92, P = 0.04, I² = 0%; 4 trials, 99 participants, GRADE: very low quality) but only one of these four trials had a low risk of bias.

AUTHORS' CONCLUSIONS

We found no definitive, adequately powered RCTs of interventions for people with dysarthria. We found limited evidence to suggest there may be an immediate beneficial effect on impairment level measures; more, higher quality research is needed to confirm this finding.Although we evaluated five studies, the benefits and risks of interventions remain unknown and the emerging evidence justifies the need for adequately powered clinical trials into this condition.People with dysarthria after stroke or brain injury should continue to receive rehabilitation according to clinical guidelines.

Towards A Clinical Tool For Automatic Intelligibility Assessment

An important, yet under-explored, problem in speech processing is the automatic assessment of intelligibility for pathological speech. In practice, intelligibility assessment is often done through subjective tests administered by speech pathologists; however research has shown that these tests are inconsistent, costly, and exhibit poor reliability. Although some automatic methods for intelligibility assessment for telecommunications exist, research specific to pathological speech has been limited. Here, we propose an algorithm that captures important multi-scale perceptual cues shown to correlate well with intelligibility. Nonlinear classifiers are trained at each time scale and a final intelligibility decision is made using ensemble learning methods from machine learning. Preliminary results indicate a marked improvement in intelligibility assessment over published baseline results.

A systematic review of nursing rehabilitation of stroke patients with aphasia

AIM AND OBJECTIVES

To explore the evidence on rehabilitation of stroke patients with aphasia in relation to nursing care, focusing on the following themes: (1) the identification of aphasia, (2) the effectiveness of speech-language interventions.

BACKGROUND

Patients with poststroke aphasia have higher mortality rates and worse functional outcome than patients without aphasia. Nurses are well aware of aphasia and the associated problems for patients with stroke because they have daily contact with them. The challenge is to provide evidence-based care directed at the aphasia. Although rehabilitation stroke guidelines are available, they do not address the caregiving of nurses to patients with aphasia.

DESIGN

Systematic review.

METHOD

Published studies were reviewed, focusing on identification and treatment of aphasic patients after stroke in terms of the consequences for nursing care. Also, data concerning effective speech-language interventions were extrapolated into nursing practice with respect to the classification of nursing interventions.

RESULTS

Intensive speech-language therapy, which was initiated in the acute stage post stroke, showed the best rehabilitation outcomes. Trained persons other than speech-language therapists provided effective speech-language interventions. Speech-language therapy included several types of intervention that met nursing intervention classifications.

CONCLUSION

The contribution of nursing to the rehabilitation of patients with aphasia is relevant. The use of screening instruments by nurses can increase early detection of aphasia, a precondition for initiating timely speech-language therapy. Collaboration between speech-language therapists and nurses is of the utmost importance for increasing the intensity and functionality of speech-language exercises, which may enhance the quality of treatment.

RELEVANCE TO CLINICAL PRACTICE

The findings of this study can be used to develop nursing rehabilitation guidelines for stroke patients with aphasia. Further research is necessary to explore the feasibility of using such guidelines in clinical nursing practice and to examine the experiences of patients with nursing interventions directed at aphasia.

Therapy-based rehabilitation services for stroke patients at home

BACKGROUND

Stroke Unit care is now accepted as an effective service model for hospital care, but the effectiveness of outpatient care is less certain. This review focuses on therapy-based rehabilitation services targeted at stroke patients living at home.

OBJECTIVES

To assess the effects of therapy-based rehabilitation services targeted towards stroke patient resident in the community within one year of stroke onset/ discharge from hospital following stroke.

SEARCH STRATEGY

We searched the Cochrane Stroke Group Trials Register (last searched November 2001). In addition we searched the following electronic databases: the Cochrane Controlled Trials Register (Cochrane Library Issue 4, 2001), MEDLINE (1996 - Nov 2001), EMBASE (1980 - Nov 2001), CINAHL (1983 - Nov 2001), PsycINFO (1967 - Nov 2001), AMED (1985 - Nov 2001), Wilson Social Sciences Abstracts (1984-Nov 2001), Science Citation Index and Social Sciences Citation Index (1981-Nov 2001). Other strategies to ensure identification of all potentially relevant trials included scanning reference lists of relevant articles and original papers, personal communication and hand searching journals.

SELECTION CRITERIA

All unconfounded, truly randomised controlled trials of stroke patients resident in the community receiving a therapy service intervention, which was compared to conventional or no care. Therapy services were those provided by physiotherapy, occupational therapy, or multidisciplinary staff working with patients primarily to improve task-orientated behaviour (e.g. walking, dressing) and hence increase activity and participation.

DATA COLLECTION AND ANALYSIS

Two reviewers independently selected trials and extracted data on a number of prespecified outcomes. The primary outcomes were the proportion of patients who had deteriorated or were dependent in personal activities of daily living and performance in personal activities of daily living at the end of follow-up.

MAIN RESULTS

We identified a heterogeneous group of 14 trials including 1617 patients. Therapy-based rehabilitation services reduced the odds of a poor outcome (Peto odds ratio 0.72 (95% CI 0.57 to 0.92; P = 0.009) and increased personal activity of daily living scores (standardised mean difference 0.14 (95% CI 0.02 to 0.25; P = 0.02). For every 100 stroke patients resident in the community receiving therapy-based rehabilitation services, 7 (95% CI 2 to 11) patients would be spared a poor outcome, assuming 37.5% would have had a poor outcome with no treatment.

REVIEWER'S CONCLUSIONS

Therapy-based rehabilitation services targeted towards stroke patients living at home appear to improve independence in personal activities of daily living. However, the evidence is derived from a review of heterogeneous interventions and therefore further exploration of the interventions is justifiable.