Cognitive-behavioral therapy for patients with post-COVID-19 condition (CBT-PCC): a feasibility trial.

BACKGROUND: The post-COVID-19 condition describes the persistence or onset of somatic symptoms (e.g. fatigue) after acute COVID-19. Based on an existing cognitive-behavioral treatment protocol, we developed a specialized group intervention for individuals with post-COVID-19 condition. The present study examines the feasibility, acceptance, and effectiveness of the program for inpatients in a neurological rehabilitation setting. METHODS: The treatment program comprises eight sessions and includes psychoeducational and experience-based interventions on common psychophysiological mechanisms of persistent somatic symptoms. A feasibility trial was conducted using a one-group design in a naturalistic setting. N = 64 inpatients with a history of mild COVID-19 that fulfilled WHO criteria for post-COVID-19 condition were enrolled. After each session, evaluation forms were completed and psychometric questionnaires on somatic and psychopathological symptom burden were collected pre- and post-intervention. RESULTS: The treatment program was well received by participants and therapists. Each session was rated as comprehensible and overall satisfaction with the sessions was high. Pre-post effect sizes (of standard rehabilitation incl. new treatment program; intention-to-treat) showed significantly reduced subjective fatigue (p < 0.05, dav = 0.33) and improved disease coping (ps < 0.05, dav = 0.33-0.49). CONCLUSIONS: Our results support the feasibility and acceptance of the newly developed cognitive-behavioral group intervention for individuals with post-COVID-19 condition. Yet, findings have to be interpreted cautiously due to the lack of a control group and follow-up measurement, the small sample size, and a relatively high drop-out rate.

Attention deficits and depressive symptoms improve differentially after rehabilitation of post-COVID condition - A prospective cohort study.

BACKGROUND: Depressive and cognitive symptoms like fatigue, loss of energy or sleep disorders characterise the post-COVID condition. Post-COVID psychosomatic rehabilitation should focus on both symptom groups. The current prospective cohort study addresses the change in these symptoms in the context of a psychosomatic rehabilitation. METHOD: N = 80 patients with post-COVID symptoms underwent psychological testing on admission and discharge: PHQ-9 questionnaire for depression, TAP - test battery for the attention test with the sub-tests working memory, sustained attention, divided attention and alertness. Sample characteristics, including health-related and work-related parameters, the general symptom load and the course of symptoms during the five weeks of rehabilitation were evaluated. RESULTS: On admission, the PHQ-9 indicated the presence of depressive symptoms in post-COVID patients (PHQ-9 = 15.15 ± 5.11). Over the course of rehabilitation, the depressive symptoms decreased to a sub-clinical level (PHQ-9 = 8.80 ± 4.61), suggesting a strong effect of post-COVID inpatient rehabilitation (Cohen's d = 1.57). At the same time, post-COVID patients showed clinically relevant impairments in attention and working memory that persisted throughout the rehabilitation period despite multimodal post-COVID treatment. CONCLUSION: Over the course of post-COVID rehabilitation, depressive symptoms appear to be significantly reduced. With regard to cognitive impairment, a comparable effect within the short period of 5 weeks is not evident. Our results suggest the need for specific treatment of persistent neuropsychological deficits following post-COVID rehabilitation.

Biopsychosocial complexity in functional neurological disorder.

BACKGROUND: Functional Neurological Disorder (FND) is considered a biopsychosocial disorder nowadays, with chronicity in >50% of cases. The INTERMED Self-Assessment Questionnaire (IMSA) assesses the various domains and indicates biopsychosocial complexity. OBJECTIVE: FND patients were compared with a sample of psychosomatic (PSM) patients as well as post-stroke patients. METHODS: The three samples (N = 287 altogether) were largely in inpatient and day clinic psychotherapeutic treatment or inpatient neurological rehabilitation. The IMSA covers all three biopsychosocial domains as well as health care utilisation in the time frame of the past, the present and the future. In addition, affective burden (GAD-7, PHQ-9), somatoform symptoms (PHQ-15), dissociation (FDS) and quality of life (SF-12) were evaluated. RESULTS: FND and PSM patients scored highly in the IMSA, with ≥70% regarded as complex, compared to 15% of post-stroke patients. Affective, somatoform and dissociation scores were high in FND and PSM patients. Mental and somatic quality of life were lower in these groups compared to post-stroke patients. DISCUSSION: FND patients showed high biopsychosocial strain, similar to a typical sample of inpatient and day clinic, i.e. severely affected, PSM patients, and they were more affected than post-stroke patients. These data emphasize that FND should be evaluated with a biopsychosocial perspective. The IMSA likely represents a valuable tool, which has to be assessed by further longitudinal studies.

Functional neurological symptoms are a frequent and relevant comorbidity in patients with multiple sclerosis.

Introduction: Functional neurological symptoms (FNS) in multiple sclerosis (MS) have shown to be underinvestigated even though neurological diseases such as MS represent a risk factor for developing FNS. Comorbidity of FNS and MS can produce high personal and social costs since FNS patients have high healthcare utilization costs and a quality of life at least as impaired as in patients with disorders with underlying structural pathology. This study aims to assess comorbid FNS in patients with MS (pwMS) and investigate whether FNS in pwMS are associated with poorer health-related quality of life and work ability. Methods: Newly admitted patients (234) with MS were studied during their stay at Kliniken Schmieder, a neurological rehabilitation clinic in Konstanz, Germany. The degree to which the overall clinical picture was explained by MS pathology was rated by neurologists and allied health practitioners on a five-point Likert scale. Additionally, neurologists rated each symptom reported by the patients. Health-related quality of life was assessed using a self-report questionnaire and work ability was assessed using the mean number of hours worked per day and information regarding disability pension as reported by patients. Results: In 55.1% of cases, the clinical picture was completely explained by structural pathology due to MS. 17.1% of pwMS presented an overall clinical picture half or less of which could be explained by underlying structural pathology. PwMS with a higher comorbid FNS burden had a lower health-related quality of life and reported fewer working hours per day than pwMS with symptoms explained by structural pathology. Furthermore, pwMS with a full disability pension had a higher comorbid FNS burden than pwMS with no or partial disability pension. Discussion: These results show that FNS should be addressed diagnostically and therapeutically since such symptoms are an important comorbidity in MS that is related to poorer health-related quality of life and lower work ability.

[Patienten mit komorbiden somatischen und psychischen Erkrankungen haben ähnliche Fähigkeitsbeeinträchtigen wie Patienten mit psychischen Erkrankungen]. / Patients with Somatic and Comorbid Mental Disorders have Similar Psychological Capacity Impairment Profiles like Patients with Mental Disorders.

OBJECTIVES: In patients with somatic illness and additional mental disorder, not only motor or sensory functions may be impaired, but also psychological capacities. These become more and more important for work ability in our modern working world. There are presently no data about the type and distribution of psychological capacity impairments in patients with comorbid somatic and mental disorders. These data are however important for estimation of diagnostic and therapy requirements. METHODS: 402 orthopedic, cardiological, and neurological patients with additional mental disorders were investigated with a structured clinical assessment for mental disorders (MINI) and psychological capacity impairments (Mini-ICF-APP). RESULTS: In all three somatic indications at least half of the comorbid patients had any clinically relevant psychological capacity impairment. Neurological patients (67%) and orthopedic patients (72%) were more often affected than cardiological patients (50.5%). Orthopedic patients are slightly more impaired in self-care; neurological and orthopedic patients are more impaired in mobility; and cardiological patients are less impaired in assertiveness. CONCLUSION: In comparison of all three somatic patient groups with mental disorders the number of psychological capacity impairments is similar. In contrast to patients with mental disorders only (i. e. those without somatic comorbidity), the psychological impairment quality in comorbid patients may be influenced by the somatic illness. The data from this study are important in order to estimate diagnostic and therapeutic needs, such as capacity training or compensation of psychological capacity impairments.

Relevance of the post-COVID syndrome within rehabilitation (PoCoRe): study protocol of a multi-centre study with different specialisations.

BACKGROUND: In Patients suffering from post-COVID syndrome, in addition to physical limitations, cognitive limitations, fatigue, dyspnea as well as depression and anxiety disorders may also be present. Up to now (as of May 2022), approx. 514 million people worldwide have been infected with SARS-CoV-2, in Germany this affects approx. 25 million. In Germany, 2.5 million people could potentially be affected by post-COVID syndrome. Post-COVID is thus a highly relevant public health issue. So far, there is no specific causal therapy for the post-COVID syndrome, but with multimodal symptom-oriented rehabilitation, the course can be favourably influenced. However, there is no study yet that focuses on patients in different rehabilitation indications and compares the focal symptomatology and coping strategies as well as the patients' benefit per indication. METHODS/DESIGN: As first objective, pulmonal, cardiac, neurological, cognitive or/and psychological functional impairments in rehabilitation patients after COVID-19 disease will be described. The second objective is the differentiated review of the specific rehabilitation measures, in the short term and in the longer term for the purpose of future prognoses and optimisation of therapeutic interventions. This prospective, non-randomised, controlled longitudinal study, plus multi-group comparisons will take place in seven rehabilitation clinics of different specialisations: cardiological rehab, pneumological rehab, neurological rehab, psychosomatic rehab. Within 12 months, 1000 cases across all participating centres will be included. Somatic and psychological testing will be conducted at three measurement points: Admission (t0), discharge (t1), 6-montas Catamnesis (t2). The patients receive the usual care according to the respective rehabilitation priorities, adapted to the special challenges of post-COVID symptoms. Patients of the post-COVID outpatient clinic without rehabilitation will be used as a control group. DISCUSSION: This study will precisely assess the extent to which subclinical neurological or/and psychological impairments are present in post-COVID-19 rehabilitation and the results will help, developing, providing and evaluating appropriate treatment concepts. This may also have relevant implications for the improvement of physical ability and quality of life in post-COVID-19 patients and increase the probability of return to work. Trial registration Z-2022-1749-8, registered 03. February 2022, https://studienanmeldung.zks-regensburg.de.

Instrumented Assessment of Motor Performance Fatigability During the 6-Min Walk Test in Mildly Affected People With Multiple Sclerosis.

There are conflicting results regarding the changes in spatio-temporal gait parameters during the 6-min walk test (6MWT) as indicators of gait-related motor performance fatigability (PF) in people with Multiple Sclerosis (pwMS). To further analyze if gait-related motor PF can be quantified using instrumented gait analysis during the 6MWT, we investigated: (i) whether gait parameters recorded during the first or second minute were more stable and thus the better baseline to assess motor PF and (ii) if the minimum toe clearance (MTC) together with "classical" spatio-temporal gait parameters can be used to quantify motor PF in pwMS. Nineteen mildly affected pwMS [12 women/7 men; 47.8 ± 9.0 years; the Expanded Disability Status Scale (EDSS): 2.7 ± 1.0] and 24 healthy controls (HC; 15 women/9 men; 48.8 ± 7.6 years) completed the 6MWT equipped with inertial measurement units. Data were analyzed using the attractor method to compare the stability of gait parameters and, besides "classical" spatio-temporal gait parameters, the MTC was calculated as a potential new marker for motor PF in pwMS as this was shown in healthy older adults. It was found that (i) gait parameters were more stable in the second than in the first minute and (ii) gait-related motor PF could not be detected based on spatio-temporal gait parameters, including the MTC. Descriptive analysis indicated a decrease in MTC variability, which is assumed to be indicative for motor PF, toward the end of the 6MWT in some pwMS. Future studies should investigate gait parameters for the assessment of motor PF in pwMS recorded during more intense and/or longer walking protocols, taking the level of disability into account. Furthermore, using gait parameters recorded in the first minute of the 6MWT as a baseline for the assessment of motor PF should be avoided.

Effects of a 6-Min Treadmill Walking Test on Dual-Task Gait Performance and Prefrontal Hemodynamics in People With Multiple Sclerosis.

Fatigue is one of the most limiting symptoms in people with multiple sclerosis (pwMS) and can be subdivided into trait and state fatigue. Activity-induced state fatigue describes the temporary decline in motor and/or cognitive performance (motor and cognitive performance fatigability, respectively) and/or the increase in the perception of fatigue (perceived fatigability) in response to motor or cognitive tasks. To the best of our knowledge, the effects of a 6-min walk test (6MWT), which was often used to assess motor performance fatigability in pwMS, on motor-cognitive dual-task performance (i.e., walking + arithmetic task) and prefrontal cortex (PFC) hemodynamics are not well-known. This is of importance, since daily activities are often performed as multitasks and a worse dual-task walking performance is associated with an increased risk of falling. Consequently, we investigated the effect of a fast 6MWT (comfort velocity + 15%) performed on a treadmill on motor-cognitive performance fatigability (spatio-temporal gait parameters/accuracy during the arithmetic task) and perceived fatigability measures (rating of perceived exhaustion; RPE) as well as PFC hemodynamics recorded during dual-task walking in pwMS and healthy controls (HCs). Twenty pwMS (48.3 ± 9.0 years; 13 females/7 males; expanded disability status scale 2.7 ± 1.0, first diagnosis 13.8 ± 8.8 years) and 24 HC with similar age and sex (48.6 ± 7.9 years; 17 females/7 males) were included. Only cognitive performance fatigability (increased error rate) during dual-task walking was found after the fast 6MWT on the treadmill in pwMS. However, the changes in gait parameters did not indicate motor performance fatigability, although both the groups reported perceived fatigability (increased RPE) after the fast 6MWT. Moreover, no change in the PFC activation was detected in both groups. Our results suggest that the intensity and/or duration of the fast 6MWT was not sufficient to induce motor performance fatigability in pwMS. These factors should be addressed by future studies on this topic, which should also consider further parameters, e.g., muscular oxygenation and/or myoelectrical activity, to verify that exercise intensity and/or duration was appropriate to induce motor performance fatigability in pwMS. Clinical Trial Register: DRKS00021057.

Quality of life after stroke rehabilitation discharge: a 12-month longitudinal study.

PURPOSE: To analyse trends in quality of life (QoL) development among older stroke patients within the first year after rehabilitation discharge, and to investigate the impact of including proxy interviews in research and practice. METHODS: A prospective cohort study with follow-up at 3, 6, and 12 months with 411 patients and proxy respondents was conducted. The EUROHIS-QOL 8-item index was used to assess QoL. By performing descriptive analyses, QoL development over time was compared among subgroups. Linear mixed models were calculated to estimate mean changes from baseline to 12-month follow-up. The effects of patient characteristics and time on QoL were investigated using comprehensive mixed models. RESULTS: One year after rehabilitation discharge, the majority of patients had neither maintained nor regained their initial QoL. Proxy respondents reported significantly lower QoL (22.6-29.5 points, p < 0.001). Characteristics associated with lower QoL were stroke severity, depression, and pain. Having a small social network was negatively associated with QoL (-1.66 points, 95%CI: -2.84/-0.48, p = 0.006). CONCLUSIONS: Quality of life scores reported at the time of rehabilitation discharge are often not lasting. Including severely impaired patients via proxies reduces the risk of overestimating QoL outcomes. Outpatient's characteristics should be taken into account when planning therapy strategies to maintain previously achieved health goals. Regular re-assessments are required.Implications for rehabilitationThere should be an awareness that improvements in quality of life (QoL) achieved during rehabilitation are not sustainable.Regularly re-assessing pain status, psychological burden, and social network size could help clinicians to determine treatment strategies for maintaining and improving rehabilitation achievements.Conducting proxy interviews is required to assess disease burden of patients with severe stroke (e.g., non-linguistic patients).

Rehab-Net: Deep Learning Framework for Arm Movement Classification Using Wearable Sensors for Stroke Rehabilitation.

In this paper, we present a deep learning framework "Rehab-Net" for effectively classifying three upper limb movements of the human arm, involving extension, flexion, and rotation of the forearm, which, over the time, could provide a measure of rehabilitation progress. The proposed framework, Rehab-Net is formulated with a personalized, light weight and low-complex, customized convolutional neural network (CNN) model, using two-layers of CNN, interleaved with pooling layers, followed by a fully connected layer that classifies the three movements from tri-axial acceleration input data collected from the wrist. The proposed Rehab-Net framework was validated on sensor data collected in two situations: 1) semi-naturalistic environment involving an archetypal activity of "making-tea" with four stroke survivors and 2) natural environment, where ten stroke survivors were free to perform any desired arm movement for the duration of 120 min. We achieved an overall accuracy of 97.89% on semi-naturalistic data and 88.87% on naturalistic data which exceeded state-of-the-art learning algorithms namely, linear discriminant analysis, support vector machines, and k-means clustering with an average accuracy of 48.89%, 44.14%, and 27.64%. Subsequently, a computational complexity analysis of the proposed model has been discussed with an eye toward hardware implementation. The clinical significance of this study is to accurately monitor the clinical progress of the rehabilitated subjects under the ambulatory settings.

Factors influencing weaning from mechanical ventilation in neurological and neurosurgical early rehabilitation patients.

BACKGROUND: Studies analyzing risk factors of weaning failure in neurological and neurosurgical early rehabilitation (NNER) patients are rare. AIM: The aim of this study was to identify clinical factors influencing the weaning of NNER patients. DESIGN: An observational, retrospective data analysis of a German multicenter study was performed. SETTING: German neurological early rehabilitation centers. POPULATION: Inpatient ventilated NNER patients (N.=192) were enrolled in the study. METHODS: Demographical data, main diagnosis, medical devices, special medical care and assessment instruments of functional abilities, consciousness and independence in activities of daily living were accrued and compared between patients with and without successful weaning. The prognostic power of factors associated with weaning success/failure was analyzed using binary logistic regression. RESULTS: In total, 75% of the patients were successfully weaned. Colonization with multi-drug resistant bacteria and the need for dialysis were independent predictors of weaning failure. Successfully weaned patients had a shorter length of stay, better functional outcome, and lower mortality than non-successfully weaned patients. CONCLUSIONS: Successfully weaned patients differ from patients with weaning failure in several clinical variables. All these variables are associated with the morbidity of the patient, indicating that the weaning process is strongly influenced by disease burden. CLINICAL REHABILITATION IMPACT: Functional abilities, level of consciousness, independence in activities of daily living, colonization with multi-drug resistant bacteria, need for dialysis and disease duration might help to predict the weaning process of NNER.

Decannulation of tracheotomized patients after long-term mechanical ventilation - results of a prospective multicentric study in German neurological early rehabilitation hospitals.

BACKGROUND: In the course of neurological early rehabilitation, decannulation is attempted in tracheotomized patients after weaning due to its considerable prognostic significance. We aimed to identify predictors of a successful tracheostomy decannulation. METHODS: From 09/2014 to 03/2016, 831 tracheotomized and weaned patients (65.4 ± 12.9 years, 68% male) were included consecutively in a prospective multicentric observation study. At admission, sociodemographic and clinical data (e.g. relevant neurological and internistic diseases, duration of mechanical ventilation, tracheotomy technique, and nutrition) as well as functional assessments (Coma Recovery Scale-Revised (CRS-R), Early Rehabilitation Barthel Index, Bogenhausener Dysphagia Score) were collected. Complications and the success of the decannulation procedure were documented at discharge. RESULTS: Four hundred seventy patients (57%) were decannulated. The probability of decannulation was significantly negatively associated with increasing age (OR 0.68 per SD = 12.9 years, p < 0.001), prolonged duration of mechanical ventilation (OR 0.57 per 33.2 days, p < 0.001) and complications. An oral diet (OR 3.80; p < 0.001) and a higher alertness at admission (OR 3.07 per 7.18 CRS-R points; p < 0.001) were positively associated. CONCLUSIONS: This study identified practically measurable predictors of decannulation, which in the future can be used for a decannulation prognosis and supply optimization at admission in the neurological early rehabilitation clinic.

Prevalence and Characteristics of Work Anxiety in Medical Rehabilitation Patients: A Cross-Sectional Observation Study.

OBJECTIVE: To investigate frequency, type, and characteristics of work anxieties in patients with somatic illness. DESIGN: Cross-sectional observation study. SETTING: Neurology, orthopedic, and cardiology rehabilitation clinics. PARTICIPANTS: Patients (N=1610; age, 18-65y) with work anxieties. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Patients who scored high on at least 2 of 9 items in the work-anxiety screening questionnaire and who reported impairment were investigated with a differential diagnostic interview on work anxieties and with the Mini-International Neuropsychiatric Interview on non-work-related common mental disorders. Patients also filled out a self-rating questionnaire on their subjective symptom load and sociodemographic data. RESULTS: Approximately 20% to 27% of the investigated inpatients in somatic rehabilitation (altogether n=393) received a work-anxiety diagnosis. Patients with orthopedic illness report highest work anxiety and have previous longest sick leave (20.6wk in the past 12mo). Patients with orthopedic illness suffer from work-related adjustment disorder with anxiety, social anxieties, and workplace phobias, whereas patients with cardiac illness are more often affected by hypochondriac anxieties. Anxieties of insufficiency and worrying occur equally in all indications. CONCLUSIONS: About a quarter of patients in somatic rehabilitation are in need of additional diagnostic attention owing to work anxieties. Differential diagnostic of work anxiety is needed for initiating adequate therapeutic action. Somatic rehabilitation physicians should be aware of work anxieties in their patients, especially in patients with orthopedic illness with previous long-term sick leave.

Prevalence of mild cognitive impairment in employable patients after acute coronary event in cardiac rehabilitation.

INTRODUCTION: Adequate cognitive function in patients is a prerequisite for successful implementation of patient education and lifestyle coping in comprehensive cardiac rehabilitation (CR) programs. Although the association between cardiovascular diseases and cognitive impairments (CIs) is well known, the prevalence particularly of mild CI in CR and the characteristics of affected patients have been insufficiently investigated so far. METHODS: In this prospective observational study, 496 patients (54.5 ± 6.2 years, 79.8% men) with coronary artery disease following an acute coronary event (ACE) were analyzed. Patients were enrolled within 14 days of discharge from the hospital in a 3-week inpatient CR program. Patients were tested for CI using the Montreal Cognitive Assessment (MoCA) upon admission to and discharge from CR. Additionally, sociodemographic, clinical, and physiological variables were documented. The data were analyzed descriptively and in a multivariate stepwise backward elimination regression model with respect to CI. RESULTS: At admission to CR, the CI (MoCA score < 26) was determined in 182 patients (36.7%). Significant differences between CI and no CI groups were identified, and CI group was associated with high prevalence of smoking (65.9 vs 56.7%, P = 0.046), heavy (physically demanding) workloads (26.4 vs 17.8%, P < 0.001), sick leave longer than 1 month prior to CR (28.6 vs 18.5%, P = 0.026), reduced exercise capacity (102.5 vs 118.8 W, P = 0.006), and a shorter 6-min walking distance (401.7 vs 421.3 m, P = 0.021) compared to no CI group. The age- and education-adjusted model showed positive associations with CI only for sick leave more than 1 month prior to ACE (odds ratio [OR] 1.673, 95% confidence interval 1.07-2.79; P = 0.03) and heavy workloads (OR 2.18, 95% confidence interval 1.42-3.36; P < 0.01). CONCLUSION: The prevalence of CI in CR was considerably high, affecting more than one-third of cardiac patients. Besides age and education level, CI was associated with heavy workloads and a longer sick leave before ACE.

[Medical rehabilitation from a lifespan perspective]. / Medizinische Rehabilitation unter einer Lifespan-Perspektive.

Lifespan research investigates the development of individuals over the course of life. As medical rehabilitation deals with primary and secondary prophylaxis, treatment, and compensation of chronic illnesses, a lifespan perspective is needed for the classification and diagnosis of chronic disorders, the assessment of course modifying factors, the identification of vulnerable life periods and critical incidents, the implementation of preventive measures, the development of methods for the evaluation of prior treatments, the selection and prioritization of interventions, including specialized inpatient rehabilitation, the coordination of therapies and therapists, and for evaluations in social and forensic medicine. Due to the variety of individual risk constellations, illness courses and treatment situations across the lifespan, personalized medicine is especially important in the context of medical rehabilitation, which takes into consideration hindering and fostering factors alike.

ActiGait implantable drop foot stimulator in multiple sclerosis: a new indication.

OBJECTIVE Direct stimulation of the peroneal nerve by the ActiGait implantable drop foot stimulator is a potent therapy that was described previously for stroke-related drop foot. The authors report here successful long-term application of the ActiGait implantable drop foot stimulator in patients with multiple sclerosis (MS). METHODS Six patients with MS and 2 years of persisting central leg paresis received an implantable ActiGait drop foot stimulator after successful surface test stimulation. Ten weeks and 1 year after surgery, their gait speed, endurance, and safety were evaluated. Patient satisfaction was assessed with a questionnaire. RESULTS In the 20-m gait test, stimulation with the ActiGait stimulator significantly reduced the time needed, on average, by approximately 23.6% 10 weeks after surgery, and the time improved further by 36.3% after 1 year. The median distance covered by patients with the stimulator after 6 minutes of walking increased significantly from 217 m to 321 m and remained stable for 1 year; the distance covered by patients after surface stimulation was 264 m. Patients with an implanted ActiGait stimulator noticed pronounced improvement in their mobility, social participation, and quality of life. CONCLUSIONS The ActiGait implantable drop foot stimulator improved gait speed, endurance, and quality of life in all patients over a period of 1 year. It may serve as a new therapeutic option for patients with MS-related drop foot.

Work-Anxiety and Sickness Absence After a Short Inpatient Cognitive Behavioral Group Intervention in Comparison to a Recreational Group Meeting.

OBJECTIVE: The aim of this study was to study the effects of a short-term cognitive behavior therapy on work-anxiety and sickness-absence in patients with work-anxiety. METHODS: Three-hundred forty-five inpatients who suffered from cardiologic, neurological, or orthopedic problems and additionally work-anxiety were randomly assigned into two different group interventions. Patients got four sessions of a group intervention, which either focused on cognitive behavior-therapy anxiety-management (work-anxiety coping group, WAG) or unspecific recreational activities (RG). RESULTS: No differences were found between WAG and RG for work-anxiety and subjective work ability. When looking at patients who were suffering only from work-anxiety, and no additional mental disorder, the duration of sickness absence until 6 months follow-up was shorter in the WAG (WAG: 11 weeks, RG: 16 weeks, P = 0.050). CONCLUSION: A short-term WAG may help return to work in patients with work-anxieties, as long as there is no comorbid mental disorder.

Detecting Elementary Arm Movements by Tracking Upper Limb Joint Angles With MARG Sensors.

This paper reports an algorithm for the detection of three elementary upper limb movements, i.e., reach and retrieve, bend the arm at the elbow and rotation of the arm about the long axis. We employ two MARG sensors, attached at the elbow and wrist, from which the kinematic properties (joint angles, position) of the upper arm and forearm are calculated through data fusion using a quaternion-based gradient-descent method and a two-link model of the upper limb. By studying the kinematic patterns of the three movements on a small dataset, we derive discriminative features that are indicative of each movement; these are then used to formulate the proposed detection algorithm. Our novel approach of employing the joint angles and position to discriminate the three fundamental movements was evaluated in a series of experiments with 22 volunteers who participated in the study: 18 healthy subjects and four stroke survivors. In a controlled experiment, each volunteer was instructed to perform each movement a number of times. This was complimented by a seminaturalistic experiment where the volunteers performed the same movements as subtasks of an activity that emulated the preparation of a cup of tea. In the stroke survivors group, the overall detection accuracy for all three movements was 93.75% and 83.00%, for the controlled and seminaturalistic experiment, respectively. The performance was higher in the healthy group where 96.85% of the tasks in the controlled experiment and 89.69% in the seminaturalistic were detected correctly. Finally, the detection ratio remains close ( ±6%) to the average value, for different task durations further attesting to the algorithms robustness.

Restoration of ankle movements with the ActiGait implantable drop foot stimulator: a safe and reliable treatment option for permanent central leg palsy.

OBJECT The ActiGait drop foot stimulator is a promising technique for restoration of lost ankle function by an implantable hybrid stimulation system. It allows ankle dorsiflexion by active peroneal nerve stimulation during the swing phase of gait. In this paper the authors report the outcome of the first prospective study on a large number of patients with stroke-related drop foot. METHODS Twenty-seven patients who experienced a stroke and with persisting spastic leg paresis received an implantable ActiGait drop foot stimulator for restoration of ankle movement after successful surface test stimulation. After 3 to 5 weeks, the stimulator was activated, and gait speed, gait endurance, and activation time of the system were evaluated and compared with preoperative gait tests. In addition, patient satisfaction was assessed using a questionnaire. RESULTS Postoperative gait speed significantly improved from 33.9 seconds per 20 meters to 17.9 seconds per 20 meters (p < 0.0001), gait endurance from 196 meters in 6 minutes to 401 meters in 6 minutes (p < 0.0001), and activation time from 20.5 seconds to 10.6 seconds on average (p < 0.0001). In 2 patients with nerve injury, surgical repositioning of the electrode cuff became necessary. One patient showed a delayed wound healing, and in another patient the system had to be removed because of a wound infection. Marked improvement in mobility, social participation, and quality of life was confirmed by 89% to 96% of patients. CONCLUSIONS The ActiGait implantable drop foot stimulator improves gait speed, endurance, and quality of life in patients with stroke-related drop foot. Regarding gait speed, the ActiGait system appears to be advantageous compared with foot orthosis or surface stimulation devices. Randomized trials with more patients and longer observation periods are needed to prove the long-term benefit of this device.