Motor network reorganization after motor imagery training in stroke patients with moderate to severe upper limb impairment

Background

Motor imagery training (MIT) has been widely used to improve hemiplegic upper limb function in stroke rehabilitation. The effectiveness of MIT is associated with the functional neuroplasticity of the motor network. Currently, brain activation and connectivity changes related to the motor recovery process after MIT are not well understood. Aim: We aimed to investigate the neural mechanisms of MIT in stroke rehabilitation through a longitudinal intervention study design with task-based functional magnetic resonance imaging (fMRI) analysis.

Methods

We recruited 39 stroke patients with moderate to severe upper limb motor impairment and randomly assigned them to either the MIT or control groups. Patients in the MIT group received 4 weeks of MIT therapy plus conventional rehabilitation, while the control group only received conventional rehabilitation. The assessment of Fugl-Meyer Upper Limb Scale (FM-UL) and Barthel Index (BI), and fMRI scanning using a passive hand movement task were conducted on all patients before and after treatment. The changes in brain activation and functional connectivity (FC) were analyzed. Pearson's correlation analysis was conducted to evaluate the association between neural functional changes and motor improvement.

Results

The MIT group achieved higher improvements in FM-UL and BI relative to the control group after the treatment. Passive movement of the affected hand evoked an abnormal bilateral activation pattern in both groups before intervention. A significant Group × Time interaction was found in the contralesional S1 and ipsilesional M1, showing a decrease of activation after intervention specifically in the MIT group, which was negatively correlated with the FM-UL improvement. FC analysis of the ipsilesional M1 displayed the motor network reorganization within the ipsilesional hemisphere, which correlated with the motor score changes.

Conclusions

MIT could help decrease the compensatory activation at both hemispheres and reshape the FC within the ipsilesional hemisphere along with functional recovery in stroke patients.     

Mental practice for upper limb motor restoration after stroke: an updated meta-analysis of randomized controlled trials

Objectives: Stroke is a common refractory disease that may cause dysfunctions in the motor system. The study aimed to evaluate the effects of mental practice (MP) compared with other methods on upper limb motor restoration after stroke.

Methods: Eligible studies were identified from Pubmed, Embase, and The Cochrane Library. The study quality was assessed with the Cochrane risk assessment tool and heterogeneity test was performed using I² statistic and Q test. Random- and fixed-effects models were used and data were reported as weighted mean difference (WMD) and 95% confidence intervals (CIs). The publication bias was examined by Egger’s test and the sensitivity analysis was conducted by ignoring one literature at a time to observe whether this document could reverse the merged results.

Results: Total of 12 randomized controlled trials were identified. No evidence of publication bias was found. In a fixed-effect model, MP (experimental group) resulted in a significantly larger increase in Fugl-Meyer assessment (FMA) compared with other exercise methods (control group) (WMD = 2.0702, 95% CI: 1.2354–2.905, Z = 4.8606, P < 0.001). In a random-effect model, a significant pooled outcome was obtained for action research arm test (ARAT) (WMD = 4.0936, 95% CI: 1.9900–6.1971, Z = 3.8141, P < 0.001). Sensitivity analysis revealed that the merged WMDs of FMA and ARAT were not reversed.

Conclusions: Mental practice is effective on upper limb motor restoration after stroke. It is recommended to treat with MP to improve the outcome of stroke.     

Effects of dynamic lycra orthosis as an adjunct to rehabilitation after botulinum toxin-A injection of the upper-limb in adults following stroke: A single-blinded randomized controlled pilot study

ABSTRACT

Background

Dynamic lycra splints are proposed to modify hypertonicity due to their characteristics – neutral warmth, circumferential pressure, and creating a low-intensity prolonged stretch on hypertonic muscles – to contribute to increased sensory awareness of the involved limb.     

早期康复治疗对脑卒中肩手综合征及上肢运动功能的影响

目的探讨早期康复治疗对预防脑卒中肩手综合征及改善上肢功能的临床效果。方法选取2013年5月~2014年5月来本院就诊的脑卒中患者97例,采用随机数字法分为观察组(Treat Group,TG)与对照组(Control Group,CG)2组。观察组运用早期综合康复治疗,比较2组患者肩手综合征发生率,并采用Fugl-Meyer(FMA)评分法评价治疗前后上肢的运动功能。结果观察组共发生肩手综合征4例(8.00%),对照组共发生肩手综合征12例(25.53%),观察组肩手综合征的发生率明显低于对照组,上肢Fugl-Meyer功能评分明显优于对照组(P0.05)。结论早期康复治疗可以在一定程度上预防肩手综合征的发生,并能改善上肢功能,提高患者生存及生活质量。     

Neuroimaging,serum biomarkers,and patient characteristics as predictors of upper limb functioning 12 weeks after acute stroke: an observational,prospective study

Objective: To evaluate the potential of neuroimaging, serum biomarkers, stroke etiology, and clinical characteristics as predictors of upper limb functioning 12 weeks after stroke.

Methods: This was a prospective, observational study of patients (18–85 years-old) hospitalized due to acute ischemic stroke in the territory of the middle cerebral artery. Patients were hospitalized at a stroke rehabilitation center, where they underwent a standardized rehabilitation program. Clinical, imagiology, laboratory (biomarkers: C-reactive protein, D-dimer, and fibrinogen, and S100 calcium binding protein β [S100β]), and functionality assessments were conducted four different times: within 24 hours, and at 48 hours, 3 weeks, and 12 weeks after acute stroke.

Results: Upper limb functioning at 12 weeks was significantly associated with Alberta Stroke Program Early CT Score (ASPECTS) score (OR:2.012 [CI:1.349–3.000]; P = 0.001) and S100β protein levels (OR:0.997 [CI:0.994–0.999]; P = 0.007). Advanced age was associated with poor upper limb functioning. S100β protein levels < 140.5 ng/L at 48 hours and ASPECTS scores ≥ 7.5 within 24 hours of admission predicted good hand functioning at 12 weeks. Upper limb functioning and general functioning were significantly correlated (P < 0.001), with strong negative correlations (all correlation coefficients ≤–0.586) for all comparisons.

Conclusion: ASPECTS score ≥ 8 within 24 hours and S100β protein < 140.5 ng/L at 48 hours predict better upper limb functioning, while advanced age predicts worse upper limb functioning 12 weeks after stroke.     

Bilateral and unilateral movement training on upper limb function in chronic stroke patients: A TMS study

The use of activity-dependent interventions has shown some success in promoting recovery of upper limb function in chronic stroke patients. This study compared the neurophysiological and behavioural changes associated with two such rehabilitation protocols: unilateral and bilateral movement training. Twelve chronic stroke patients were randomly assigned to the two training protocols involving six daily practice sessions. Each session consisted of 50 trials of a dowel placement task performed either with both impaired and unimpaired arm moving synchronously (bilateral training group) or with only the impaired arm moving (unilateral training). Kinematic measurements of upper limb movements were made in four unilateral test trials performed prior to and following each practice session. Functional assessments of the impaired upper limb and neurophysiological assessments, using transcranial magnetic stimulation (TMS), of the affected and non-affected cortical hemispheres were made prior to and following the intervention sessions. Individuals receiving bilateral training showed a reduction in movement time of the impaired limb and increased upper limb functional ability compared to individuals receiving unilateral training. In some patients changes to upper limb function were associated with changes to the cortical representation of a target muscle in the non-affected hemisphere. Overall, these findings suggest that a short-term bilateral training intervention may be effective in facilitating upper limb motor function in chronic stroke patients.     

Factors affecting burden on caregivers of stroke survivors: Population-based study in Mumbai (India)

Background:

Caring for stroke patients leads to caregiver (CG) strain. The aims of this study are to identify factors related to increased CG burden in stroke survivors in a census-defined population and to assess the relationship between patient characteristics and CG stress.

Materials and Methods:

In a prospective population-based study, 223 first ever stroke (FES) were identified over a 1-year period. At 28 days, 127 (56.9%) were alive and 79 (35%) died, and 17 were lost to follow-up. One hundred and eleven CGs of 127 FES survivors agreed to participate. The level of stress was assessed by two scales: Oberst Caregiving Burden Scale (OCBS) and the Caregivers Strain Index (CSI) in CGs of survivors with mild stroke Modified Rankin Scale (MRS 1-2) and in those with significant disability (MRS 3-5).

Results:

The mean age of CGs was 45.6 years, approximately 22 years younger than that of the patients (67.5 years). Eighty-nine (80%) of the CGs were females and only 22 (20%) were males. Urinary incontinence (P=0.000008), morbidity at 28 days by MRS (P=0.0051), female gender (P=0.0183) and moderate to severe neurological deficit by National Institute of Health Stroke Scale (NIHSS) on admission (P=0.0254) were factors in FES cases leading to major CGs stress. CG factors responsible for major stress were long caregiving hours (P≤0.000001), anxiety (P≤0.000001), disturbed night sleep (P≤0.000001), financial stress (P=0.0000108), younger age (P=0.0021) and CGs being daughter-in-laws (P=0.012).

Conclusion:

Similar studies using uniform methodologies would help to identify factors responsible for major CG stress. Integrated stroke rehabilitation services should address CG issues to local situations and include practical training in simple nursing skills and counseling sessions to help reduce CG burden.     

Motor recovery of stroke patients after rehabilitation: one-year follow-up study

Purpose To investigate motor recovery of stroke patients 1 year after rehabilitation. Materials and Methods A cross-sectional study of 192 stroke patients discharged from rehabilitation wards in nine tertiary hospitals was conducted. Motor recovery was assessed using the Brunnstrom motor recovery stages (BMRS), at 6 and 12 months after discharge. Factors related to the BMRS of the hand, arm and leg were analyzed. Results The mean age of patients was 62.2 years (57.3% male). Significantly more patients presented improvement of at least one BMRS of the hand, arm and leg compared with those with decreasing BMRS (p < 0.001). The percentage of patients with BMRS III– VI at 6 months was greater than that at discharge, but the recovery at 12 months was slightly higher than that at 6 months. It seems that motor recovery from stroke was near maximal at six months. Regarding the factors related to motor recovery, only lengths of stay (LOS) <30 d during the first admission and Barthel index at discharge ≥10 were related to the improvement of BMRS of the hand, arm and leg on multivariate analysis. Additionally, no complication at discharge was associated with the improvement of BMRS of the leg. Conclusions Approximately half of our stroke patients had motor improvement of at least one stage of BMRS at one year. Motor recovery after stroke at the end of the first year was associated with shorter LOS during the first admission, higher discharge Barthel index score and absence of complications at discharge.     

Effect of intensive motor training with repetitive transcranial magnetic stimulation on upper limb motor function in chronic post-stroke patients with severe upper limb motor impairment

Background Intensive motor training with low-frequency repetitive transcranial magnetic stimulation (rTMS) has efficacy as a therapeutic method for motor dysfunction of the affected upper limb in patients with mild to moderate stroke. However, it is not clear whether this combination therapy has the same effect in chronic post-stroke patients with severe upper limb motor impairment.

Objectives The aim of this study was to test the treatment effects of intensive motor training with low-frequency rTMS in chronic post-stroke patients with severe upper limb motor impairment.

Methods A convenience sample of 26 chronic post-stroke patients with severe upper limb motor impairment participated in this study with the non-randomized, non-controlled clinical trial. All subjects were hospitalized to receive intensive motor training with low-frequency rTMS. During 2 weeks in which Sundays were excluded, a total of 24 sessions (2 sessions per day) of the intervention were conducted. The Fugl–Meyer Assessment (FMA) and Wolf Motor Function Test (WMFT) were used to assess motor impairment and function of the affected upper limb, respectively, before and after intervention. Paired t-test was used to analyze the effects of the intervention.

Results The FMA total score and WMFT log performance time significantly improved from before to after intervention (FMA: 12.6–18.0; WMFT: 3.6–3.3, p < 0.001).

Conclusions The present results suggest that intensive motor training with low-frequency rTMS could improve motor impairment in chronic post-stroke patients with severe upper limb motor impairment and contribute to the expansion of the application range of this combination therapy.     

Effects of repeated abobotulinumtoxinA injections in upper limb spasticity

Introduction: The efficacy of single injections of abobotulinumtoxinA (Dysport) is established in adults with upper limb spasticity. In this study we assessed the effects of repeated injections of abobotulinumtoxinA over 1 year. Methods: Patients (n = 258, safety population) received 500 U, 1,000 U, or 1,500 U (1,500‐U dose included 500‐U shoulder injections) for up to 4 or 5 treatment cycles. Assessments included treatment‐emergent adverse events (TEAEs), muscle tone, passive and active range of motion (X_V1, X_A), angle of catch (X_V3), Disability Assessment Scale (DAS) score, Modified Frenchay Scale (MFS) score, and Physician Global Assessment (PGA) score. Results: The incidence of TEAEs decreased across cycles. Muscle tone reduction and X_V1 remained stable across cycles, whereas X_V3 and X_A continued to improve at the finger, wrist, and elbow flexors. DAS and PGA improved across cycles. MFS improved best with 1,500 U. Discussion: A favorable safety profile and continuous improvements in active movements and perceived and active function were associated with repeated abobotulinumtoxinA injections in upper limb muscles. Muscle Nerve 57 : 245–254, 2018     

Effects of botulinum toxin A therapy and multidisciplinary rehabilitation on upper and lower limb spasticity in post-stroke patients

Objectives. The purpose of this study was to examine the effects of combined botulinum toxin type A (BoNT-A) and inpatient multidisciplinary (MD) rehabilitation therapy on the improvement of upper and lower limb function in post-stroke patients. Methods. In this retrospective study, a 12-day inpatient treatment protocol was implemented on 51 post-stroke patients with spasticity. Assessments were performed on the day of admission, at discharge, and at 3 months following discharge. Results. At the time of discharge, all of the evaluated items showed a statistically significant improvement. Only the Functional Reach Test (FRT) showed a statistically significant improvement at 3 months. In subgroup analyses, the slowest walking speed group showed a significantly greater change ratio of the 10 Meter Walk Test relative to the other groups, from the time of admission to discharge. This group showed a greater FRT change ratio than the other groups from the time of admission to the 3-month follow-up. Conclusion. Inpatient combined therapy of simultaneous injections of BoNT-A to the upper and lower limbs and MD may improve motor function.     

Neuromuscular taping for the upper limb in Cerebral Palsy: A case study in a patient with hemiplegia

Objective: To assess quantitatively the effects of Neuromuscular Taping (NMT) on the upper limb in a female child with left hemiplegia, due to Cerebral Palsy (CP).

Methods: The patient underwent NMT on cervical level, shoulder and hand only of the plegic upper limb, followed by physical therapy. Kinematic data of upper limbs during reaching task were collected before (PRE) and after 2 weeks of treatment (POST).

Results: After the intervention, the affected limb improved in terms of movement duration, Average Jerk and Number of Unit Movements indices, indicating a faster, smoother and less segmented movement. Improvements appeared at the ranges of motion of the upper limb joints, both at shoulder and elbow joints. No significant changes were globally displayed for the unaffected arm.

Conclusion: NMT seems to be a promising intervention for improving upper limb movement in patients with CP. Further investigations are certainly needed to assess effectively the effects of the intervention in this pathological state.     

针刺结合康复训练治疗老年脑卒中后上肢功能障碍的疗效

目的观察针刺结合康复训练治疗老年脑卒中后上肢功能障碍的疗效。方法选择我院2015-09-2016-11收治的脑卒中合并上肢功能障碍患者112例,根据随机数字表法将所有患者分为2组,每组56例。对照组给予常规康复训练,观察组在此基础上联合针刺治疗,比较2组临床疗效、日常生活能力评分、疼痛评分、上肢运动功能评分及神经功能评分。结果治疗后2组临床疗效相比,观察组优于对照组,差异具有统计学意义(P0.05);2组治疗前ADL、FMA、VAS、NDS评分相比,差异无统计学意义(P0.05);治疗后ADL、FMA、VAS、NDS评分均优于治疗前,组间相比,观察组优于对照组,差异具有统计学意义(P0.05)。结论针刺结合康复训练可改善老年脑卒中后上肢功能障碍,减少神经功能损伤和疼痛,提高日常生活能力。     

Structural muscular adaptations in upper limb after stroke: a systematic review

Background: Stroke is a leading cause of disability in the adult population, impairing upper limb (UL) movements affecting activities of daily living. Muscle weakness has been associated to disabilities in this population, but much attention is given to central nervous system alterations and less to skeletal muscles.

Objective: The objective of this review is to carry out a systematic literature review to identify structural muscle alterations in the UL of poststroke individuals.

Method: The search was performed in December, 2017. MEDLINE, PubMed, SCOPUS, CINAHL, and Science Direct were used as electronic databases. There was no restriction regarding language and publication dates. Studies conducted on poststroke subjects and results on UL skeletal muscle alterations identified by imaging tests were included.

Results: Seven studies were included. The sample size and the variables varied among the studies. All the studies compared the paretic UL with the nonparetic UL and one of the studies also compared healthy subjects. Ultrasonography was the most used measurement tool to assess muscle adaptation.

Conclusions: This review demonstrated little evidence with poor to fair quality on the structural muscle adaptations in the poststroke subjects, showing muscle atrophy, a higher stiffness, and amount of fibrous and fat tissue without alterations in lean tissue of distal muscles of the paretic UL compared to the nonparetic limb. However, the nonparetic side also presented alterations, which makes it an inappropriate comparison. Thus, well-designed studies addressing this issue are required.     

The fourier M2 robotic machine combined with occupational therapy on post-stroke upper limb function and independence-related quality of life: A randomized clinical trial

ABSTRACT

Most post-stroke patients experience upper limb functionality challenges. Emergent therapies using upper limb-based robot machines present opportunities to resolve the limitations inherent in Occupational therapy such as increased therapist-patient exhaustion, monotonous methods, and so forth.

The aim of this parallel trial was to compare the effects of the upper limb robotic training with matched Occupational therapy training on upper limb function and independence-related quality of life in post-stroke patients within the Brunnstrom arm motor recovery stages 1 to 4. During one-year (2018–2019), 50 post-stroke patients were enrolled and randomly assigned to 2 groups; robot and Occupational therapy (n = 25) and Occupational therapy (n = 25). Both groups were trained for 50–70 minutes per day, 5 days a week for 6 weeks. The Chinese-adapted Fugl-Meyer Assessment-Upper Extremity (FMA-UE) was the primary outcome measure. The secondary outcome measures were the Brunnstrom Recovery Stages Scale (BRS) and the Chinese-adapted Barthel Index (BI). The treatment effect sizes of both groups were large in the following variables; transfers (1), BI total score (2.2), FMA-UE upper limb (1.1), wrist (1.8), elbow (1), fingers (0.9), and FMA-UE total scores (1.4). The treatment group in comparison to the control group had larger BRS changes, significant improvements in upper limb function, and partial independence in activities of daily living during the baseline to post-treatment period. Robotic-assisted training with occupational therapy may improve the upper limb movement foundation blocks; however, it does not translate into complete functional independence and improved quality of life. This study has been registered at the ISRCTN registry, https://doi.org/10.1186/ISRCTN84804731