Associations among depression, demographic variables, and language impairments in chronic post-stroke aphasia

Depression and quality of life in patients with Broca's and subcortical stroke-related aphasia: A comparative study

AIM

Aphasia, primarily recognized as a language disorder following stroke, often is presented with concurrent emotional and social difficulties, including depression. This study investigated whether the type of aphasia-Broca's or subcortical-may be related to the prevalence of depression and overall quality of life (QOL) in affected individuals.

METHODS

The present study involved 46 individuals with chronic aphasia resulting from left hemisphere strokes. Participants were divided into two groups: those with Broca's aphasia and those with subcortical aphasia. Several assessment tools were utilized, including the Persian versions of Mini-Mental State Examination (MMSE), Western Aphasia Battery (P-WAB-1), the Beck Depression Inventory-II (BDI-II), and the Stroke and Aphasia Quality of Life Scale-39 (SAQOL-39).

RESULTS

The results indicated that the average severity of aphasia was significantly lower in the Broca's aphasia group (36.48 ± 8.05) compared to the subcortical aphasia group (62.83 ± 19.88). However, both groups demonstrated similar depression severity scores and their quality of life was largely comparable to each other.

CONCLUSION

This study underscores that living with aphasia, regardless of type, involves emotional and social challenges that may be extended beyond language difficulties, emphasizing the need to address these issues to improve the well-being of stroke survivors.

Drivers of Depression in Chronic Post-Stroke Aphasia

Background

Approximately one third of stroke survivors develop post-stroke depression, which reduces quality of life. Previous studies have often focused on early phases of recovery and excluded people with significant aphasia. Here, we examine relationships of depression symptoms to demographic factors, and different types of stroke-related disability and impairment in adults with chronic left-hemisphere stroke and a history of aphasia.

Methods

92 chronic left-hemisphere stroke survivors with a history of aphasia and 70 controls participated in this cross-sectional study. The Beck Depression Inventory-II (BDI-II) measured depression symptoms. The Stroke Impact Scale 3.0 (SIS) assessed stroke-related disability in Cognitive, Physical, and Social Participation domains, as well as self-perceived Recovery. The Western Aphasia Battery Aphasia Quotient and the NIH Stroke Scale total motor score measured language and motor impairment. Spearman correlations examined bivariate relationships between variables. Ordinal regression models examined group differences in BDI-II scores (Model 1), and disability and impairment factors that predicted BDI-II scores (Model 2), accounting for demographic factors and antidepressant medication status.

Results

BDI-II scores were on average 3.4 points higher in stroke survivors than controls. Model 1 confirmed that this difference was significant, and found that age was inversely related to BDI-II scores. Bivariate correlations demonstrated that higher BDI-II scores were related to lower SIS Cognitive, Social Participation, and Recovery scores. Model 2 found that these three measures independently predicted BDI-II scores.

Conclusions

The factors related to depression may differ depending on the nature of the stroke, the types of deficits experienced, and the phase of recovery. In the chronic phase of left hemisphere stroke with aphasia, cognitive and communication disabilities, social participation, and self-perceived recovery are the primary correlates of depression symptoms. These findings highlight the importance of assessing for depression even long after left hemisphere stroke, and suggest potential targets for psychotherapy to improve depression.

Increased risk of depression and associated symptoms in poststroke aphasia

Poststroke aphasia hinders patients' emotional processing and social adaptation. This study estimated the risks of depression and related symptoms in patients developing or not developing aphasia after various types of stroke. Using data from the US Collaborative Network within the TriNetX Diamond Network, we conducted a retrospective cohort study of adults experiencing their first stroke between 2013 and 2022. Diagnoses were confirmed using corresponding International Classification of Diseases, Tenth Revision, Clinical Modification codes. Patients were stratified by poststroke aphasia status and stroke type, with propensity score matching performed to control for confounders. The primary outcome was depression within one year post-stroke; secondary outcomes included anxiety, fatigue, agitation, emotional impact, and insomnia. Each matched group comprised 12,333 patients. The risk of depression was significantly higher in patients with poststroke aphasia (hazard ratio: 1.728; 95% CI 1.464-2.038; p < 0.001), especially those with post-hemorrhagic-stroke aphasia (hazard ratio: 2.321; 95% CI 1.814-2.970; p < 0.001). Patients with poststroke aphasia also had higher risks of fatigue, agitation, and emotional impact. Anxiety and insomnia risks were higher in those with post-hemorrhagic-stroke aphasia. Poststroke aphasia, particularly post-hemorrhagic-stroke aphasia, may increase the risks of depression and associated symptoms, indicating the need for comprehensive psychiatric assessments.

Clinical characteristics of post-stroke basal ganglia aphasia and the study of language-related white matter tracts based on diffusion spectrum imaging

BACKGROUND

Stroke often damages the basal ganglia, leading to atypical and transient aphasia, indicating that post-stroke basal ganglia aphasia (PSBGA) may be related to different anatomical structural damage and functional remodeling rehabilitation mechanisms. The basal ganglia contain dense white matter tracts (WMTs). Hence, damage to the functional tract may be an essential anatomical structural basis for the development of PSBGA.

METHODS

We first analyzed the clinical characteristics of PSBGA in 28 patients and 15 healthy controls (HCs) using the Western Aphasia Battery and neuropsychological test batteries. Moreover, we investigated white matter injury during the acute stage using diffusion magnetic resonance imaging scans for differential tractography. Finally, we used multiple regression models in correlation tractography to analyze the relationship between various language functions and quantitative anisotropy (QA) of WMTs.

RESULTS

Compared with HCs, patients with PSBGA showed lower scores for fluency, comprehension (auditory word recognition and sequential commands), naming (object naming and word fluency), reading comprehension of sentences, Mini-Mental State Examination, and Montreal Cognitive Assessment, along with increased scores in Hamilton Anxiety Scale-17 and Hamilton Depression Scale-17 within 7 days after stroke onset (P < 0.05). Differential tractography revealed that patients with PSBGA had damaged fibers, including in the body fibers of the corpus callosum, left cingulum bundles, left parietal aslant tracts, bilateral superior longitudinal fasciculus II, bilateral thalamic radiation tracts, left fornix, corpus callosum tapetum, and forceps major, compared with HCs (FDR < 0.02). Correlation tractography highlighted that better comprehension was correlated with a higher QA of the left inferior fronto-occipital fasciculus (IFOF), corpus callosum forceps minor, and left extreme capsule (FDR < 0.0083). Naming was positively associated with the QA of the left IFOF, forceps minor, left arcuate fasciculus, and uncinate fasciculus (UF) (FDR < 0.0083). Word fluency of naming was also positively associated with the QA of the forceps minor, left IFOF, and thalamic radiation tracts (FDR < 0.0083). Furthermore, reading was positively correlated with the QA of the forceps minor, left IFOF, and UF (FDR < 0.0083).

CONCLUSION

PSBGA is primarily characterized by significantly impaired word fluency of naming and preserved repetition abilities, as well as emotional and cognitive dysfunction. Damaged limbic pathways, dorsally located tracts in the left hemisphere, and left basal ganglia pathways are involved in PSBGA pathogenesis. The results of connectometry analysis further refine the current functional localization model of higher-order neural networks associated with language functions.

A Review of Poststroke Aphasia Recovery and Treatment Options

Poststroke aphasia, which impacts expressive and receptive communication, can have detrimental effects on the psychosocial well-being and the quality of life of those affected. Aphasia recovery is multidimensional and can be influenced by several baseline, stroke-related, and treatment-related factors, including preexisting cerebrovascular conditions, stroke size and location, and amount of therapy received. Importantly, aphasia recovery can continue for many years after aphasia onset. Behavioral speech and language therapy with a speech-language pathologist is the most common form of aphasia therapy. In this review, the authors also discuss augmentative treatment methodologies, collaborative goal setting frameworks, and recommendations for future research.

Inner speech in the daily lives of people with aphasia

Introduction

This exploratory, preliminary, feasibility study evaluated the extent to which adults with chronic aphasia (N = 23) report experiencing inner speech in their daily lives by leveraging experience sampling and survey methodology.

Methods

The presence of inner speech was assessed at 30 time-points and themes of inner speech at three time-points, over the course of three weeks. The relationship of inner speech to aphasia severity, demographic information (age, sex, years post-stroke), and insight into language impairment was evaluated.

Results

There was low attrition (<8%) and high compliance (>94%) for the study procedures, and inner speech was experienced in most sampled instances (>78%). The most common themes of inner speech experience across the weeks were 'when remembering', 'to plan', and 'to motivate oneself'. There was no significant relationship identified between inner speech and aphasia severity, insight into language impairment, or demographic information. In conclusion, adults with aphasia tend to report experiencing inner speech often, with some shared themes (e.g., remembering, planning), and use inner speech to explore themes that are uncommon in young adults in other studies (e.g., to talk to themselves about health).

Discussion

High compliance and low attrition suggest design feasibility, and results emphasize the importance of collecting data in age-similar, non-brain-damaged peers as well as in adults with other neurogenic communication disorders to fully understand the experience and use of inner speech in daily life. Clinical implications and future directions are discussed.

A reconceptualization of sentence production in post-stroke agrammatic aphasia: the synergistic processing bottleneck model

The language production deficit in post-stroke agrammatic aphasia (PSA-G) tends to result from lesions to the left inferior frontal gyrus (LIFG) and is characterized by a triad of symptoms: fragmented sentences, errors in functional morphology, and a dearth of verbs. Despite decades of research, the mechanisms underlying production patterns in PSA-G have been difficult to characterize. Two major impediments to progress may have been the view that it is a purely morphosyntactic disorder and the (sometimes overzealous) application of linguistic theory without interceding psycholinguistic evidence. In this paper, empirical evidence is examined to present an integrated portrait of language production in PSA-G and to evaluate the assumption of a syntax-specific syndrome. In light of extant evidence, it is proposed that agrammatic language production results from a combination of morphosyntactic, phonomotor, and processing capacity limitations that cause a cumulative processing bottleneck at the point of articulatory planning. This proposed Synergistic Processing Bottleneck model of PSA-G presents a testable framework for future research. The paper ends with recommendations for future research on PSA-G.

Perspectives of U.S. speech-language pathologists on supporting the psychosocial health of individuals with aphasia

INTRODUCTION

Individuals living with aphasia (IWA) are more likely than stroke survivors without aphasia to experience depression, anxiety, stress, and social isolation due to communication difficulties, social and life barriers, and neurobiological changes (Hilari, 2011). Researchers in the U.K., Australia, and elsewhere have surveyed speech-language pathologists (SLPs) to ascertain their training and confidence in addressing the psychosocial well-being of IWA (Northcott et al., 2017; Sekhon et al., 2015). To date, no similar survey has been performed in the U.S. The aim of this study was to survey the perspectives of U.S. SLPs on addressing the psychosocial well-being of IWA.

METHODS

The survey questions were drawn from Northcott et al. (2017), with adjustments for a U.S. audience and additional questions. We conducted a Qualtrics survey which remained open from November 2021 through May 2022 and collected 101 responses. Responses to the closed questions were analyzed using descriptive statistics and open-ended responses were analyzed with qualitative content analysis.

RESULTS

Some of the most significant findings of this survey include the low levels of confidence in addressing psychological health, lack of training among SLPs, and rarity of successful collaboration with mental health professionals. In comparison to surveys conducted in other countries, many overarching themes were similar, but there was some variation in specific responses and patterns. Categories emerging from the open-ended responses included the need for more trained mental health professionals, improved collaboration, and emphasis on the importance of the topic.

CONCLUSIONS

This research highlights the necessity of increased training, as well as improved interprofessional collaboration between SLPs and mental health professionals. Limitations of the study include the potential bias of respondents, as well as the number and scope of the questions and responses. Future studies can employ interviews, trial models for collaboration, and partner with IWA to explore their experiences with psychosocial health support and services.

Modulations of static and dynamic functional connectivity among brain networks by electroacupuncture in post-stroke aphasia

Introduction

Post-stroke aphasia (PSA) is a language disorder caused by left hemisphere stroke. Electroacupuncture (EA) is a minimally invasive therapeutic option for PSA treatment. Tongli (HT5) and Xuanzhong (GB39), two important language-associated acupoints, are frequently used in the rehabilitation of patients with PSA. Preliminary evidence indicated functional activation in distributed cortical areas upon HT5 and GB39 stimulation. However, research on the modulation of dynamic and static functional connectivity (FC) in the brain by EA in PSA is lacking.

Method

This study aimed to investigate the PSA-related effects of EA stimulation at HT5 and GB39 on neural processing. Thirty-five participants were recruited, including 19 patients with PSA and 16 healthy controls (HCs). The BOLD signal was analyzed by static independent component analysis, generalized psychophysiological interactions, and dynamic independent component analysis, considering variables such as age, sex, and years of education.

Results

The results revealed that PSA showed activated clusters in the left putamen, left postcentral gyrus (PostCG), and left angular gyrus in the salience network (SN) compared to the HC group. The interaction effect on temporal properties of networks showed higher variability of SN (F = 2.23, positive false discovery rate [pFDR] = 0.017). The interaction effect on static FC showed increased functional coupling between the right calcarine and right lingual gyrus (F = 3.16, pFDR = 0.043). For the dynamic FC, at the region level, the interaction effect showed lower variability and higher frequencies of circuit 3, with the strongest connections between the supramarginal gyrus and posterior cingulum (F = 5.42, pFDR = 0.03), middle cingulum and PostCG (F = 5.27, pFDR = 0.036), and triangle inferior frontal and lingual gyrus (F = 5.57, pFDR = 0.026). At the network level, the interaction effect showed higher variability in occipital network-language network (LN) and cerebellar network (CN) coupling, with stronger connections between the LN and CN (F = 4.29, pFDR = 0.042). Dynamic FC values between the triangle inferior frontal and lingual gyri were anticorrelated with transcribing, describing, and dictating scores in the Chinese Rehabilitation Research Center for Chinese Standard Aphasia Examination.

Discussion

These findings suggest that EA stimulation may improve language function, as it significantly modulated the nodes of regions/networks involved in the LN, SN, CN, occipital cortex, somatosensory regions, and cerebral limbic system.