Therapeutic relationships in speech-language pathology: A scoping review of empirical studies.

PURPOSE: This scoping review provides an overview of empirical studies investigating therapeutic relationships between speech-language pathologists (SLPs), clients, and caregivers across all ages and clinical areas, and identifies areas of future research. METHOD: The Joanna Briggs Institute's (JBI) scoping review method was employed. Systematic searches were conducted across seven databases and four grey literature databases. Research published in English and German until 3 August 2020 was included. Data were extracted for the primary aim, terminology and theoretical foundations, research design, and focus. Central findings concerning the input-, process-, outcome-, and output-level of speech-language pathology were categorised. RESULT: Of 5479 articles, 44 articles were included in the analysis. Psychotherapy was the leading discipline for the theoretical foundation and measurement of relationship quality. Most findings focused on therapeutic attitudes, qualities, and relational actions to build the basis of a positive therapeutic relationship. A small number of studies indicated connections between clinical outcomes and the quality of the relationships. CONCLUSION: Future research needs to address precision of terminology, expansion of qualitative and quantitative research methods, development and psychometric examination of measuring instruments specific to SLPs and the development and evaluation of concepts to support professional relationship building in speech-language pathology training and everyday work.

Effects of cerebellar transcranial direct current stimulation (tDCS) on motor skill learning in swallowing.

OBJECTIVE: This study evaluated the effects of cerebellar tDCS on motor learning for swallowing. METHODS: In a double-blind RCT, 39 healthy adults received either sham, anodal tDCS, or cathodal tDCS in two sessions on two consecutive days. Following 20 min cerebellar tDCS (2 mA) or sham, they underwent swallowing skill training that targeted control of timing and magnitude of submental muscle activation during swallowing. Linear mixed models were used to identify the effects of stimulation on timing and magnitude accuracy as measured by the change in task performance for each training session, and for skill retention on days 3 and 10 post-intervention. RESULTS: Only the sham group had a reduced temporal error from baseline to all following timepoints. When compared to error changes in the sham group, changes from baseline in temporal errors were higher at all timepoints post-intervention for the anodal group, and higher at both retention assessments for the cathodal group. Amplitude errors were smaller for all conditions at all timepoints post-intervention compared to baseline. CONCLUSIONS: Cerebellar tDCS was found to inhibit temporal aspects of motor skill learning in swallowing. For the tDCS parameters used in this study, there is no support for use of tDCS to facilitate swallowing rehabilitation. Trial Registry Number (https://www.anzctr.org.au/): ACTRN12615000451505.IMPLICATIONS FOR REHABILITATIONCerebellar tDCS, in combination with motor skill training, has been demonstrated to increase motor skill learning in healthy individuals and neurologically impaired patients.In this study, cerebellar tDCS applied prior to swallowing skill training adversely affected timing measures of submental muscle activation during swallowing.In contrast to published outcomes in the corticospinal literature, both anodal and cathodal tDCS resulted in a relative inhibitory effect on motor skill learning in swallowing when compared to the sham condition.Swallowing skill training without tDCS produced increased accuracy in outcomes.

Effect of Volitional Effort on Submental Surface Electromyographic Activity During Healthy Swallowing.

The effortful swallowing technique aims to compensate for or rehabilitate impaired swallowing by using maximal volitional effort to behaviorally modify aspects of swallowing physiology. Given that swallowing is a submaximal task, swallowing at submaximal levels has recently been suggested as a more task-specific therapeutic technique. The aim of this study was to investigate differences in muscle activity during minimum, regular, and maximum effort swallowing of different boluses and across different ages, with the goal of characterizing the task specificity of minimum effort and maximum effort swallowing. Forty-three healthy adults (22 female) representing four age groups (20-39, 40-59, 60-79, and 80 + years) participated in the study. They were verbally cued to swallow saliva and 5 mL water boluses using participant-determined minimum, regular, and maximum levels of effort, in randomized order. sEMG peak amplitude and duration of each swallow were measured. Linear mixed effects analyses demonstrated that compared to regular effort swallowing, maximum effort swallowing resulted in increased sEMG amplitude (p < .001) and prolonged duration (p < .001), while minimum effort swallowing resulted in decreased amplitude (p < .001) but no significant difference in duration (p = .06). These effects occurred regardless of age or bolus type. Differences in sEMG activity were smaller between regular and minimum effort swallowing than regular and maximum effort swallowing. Both increasing and decreasing volitional efforts during swallowing translate to significant modulation of muscle activity. However, regular swallowing is more similar to minimal effort swallowing. Results reinforce the concept of swallowing as a submaximal task, and provide insight into the development of sEMG biofeedback techniques for rehabilitation.

Therapeutic relationships in speech-language pathology: a scoping review protocol.

OBJECTIVE: The purpose of this scoping review is to provide an overview of empirical research regarding the therapeutic relationship between speech-language pathologists and their clients of all ages and clinical areas. INTRODUCTION: The influence of a positive relationship between professionals and clients on the process and outcome of interventions is well documented for many health professions. However, research in speech-language pathology predominantly focuses on the outcome of specific treatment methods and techniques. The number of empirical research studies on the therapeutic relationship within this research area is increasing. At present, existing research has not been summarized and compared. INCLUSION CRITERIA: The review will include all empirical research that addresses the therapeutic relationship between speech-language pathologists and their clients of all ages and clinical areas. Since speech-language pathologists often collaborate intensively with caregivers of their clients, such as parents or partners, these groups will also be included. METHODS: Systematic searches will be conducted across seven research databases (ASHAWire, CINAHL, ERIC, Fachportal Pädagogik, LIVIVO, MEDLINE [PubMed], and PsycINFO) and four unpublished/gray literature databases (evidenssst, ndldt, OpenGrey, and SSOAR). Data will be extracted by two independent reviewers for author(s), year of publication, country of origin, research questions, participants, terminology and theoretical foundations, research design, and focus. Central findings concerning the therapeutic relationship on the input-, process-, outcome, and output-level of speech-language interventions will be analyzed. Results will be presented as a narrative summary.

The capacity for volitional control of pharyngeal swallowing in healthy adults.

INTRODUCTION: Previous research has documented that pressure and duration of brainstem-generated pharyngeal swallowing can be cortically modulated. But there is a commonly held belief that the sequence of pharyngeal pressure remains constant. However, Huckabee et al. [19] reported a patient cohort who demonstrated reduced latency of peak pressure in the proximal and distal pharynx, disproportionate and sometimes inversely correlated with overall swallowing duration, suggesting independent timing of underlying muscle contraction within the overall pharyngeal response. This study examined if healthy adults can volitionally produce altered latency of pharyngeal closure in isolation following intensive training, thereby evaluating the capacity for pharyngeal adaptation in a healthy system. METHOD: Six healthy participants were seen for intensive training, consisting of daily one-hour sessions over two weeks (10 days) using pharyngeal manometry as a visual biofeedback modality. The participants were instructed to produce simultaneous pressure in the pharyngeal sensors when swallowing. The temporal separation of peak proximal and distal pharyngeal pressure was measured with discrete-sensor pharyngeal manometry at baseline, during training with biofeedback, and following training without biofeedback. RESULTS: Following intensive training, participants were able to reduce temporal separation of peak pressure between the proximal and distal pharyngeal sensors from a baseline median of 188 ms (IQR=231 ms) to 68 ms (IQR=92 ms; p=0.002). In contrast, there was no significant change in overall swallowing duration during training (p=0.41). However, change in pharyngeal pressure latency was moderately correlated with both change in swallowing duration (r=0.444) and amplitude (r=0.571) during training, and there was a reduction in swallowing duration post-training (p=0.03). CONCLUSION: Given intensive manometric biofeedback training, participants substantially reduced temporal separation of peak proximal and distal pharyngeal pressure when volitionally swallowing. However, correlation with overall pressure and duration measures suggest the adaptation was one of modulating the cumulative pharyngeal response rather than altering discrete components of timing of pharyngeal pressure in isolation. This is inconsistent with the pattern of behaviour documented by Huckabee et al. [19] in the patient population. Further research on modulatory control over targeted aspects of the pharyngeal swallow is needed, and may provide avenues for rehabilitative treatment of patients with dysphagia.