The Parkinson disease pain classification system: results from an international mechanism-based classification approach.

ABSTRACT: Pain is a common nonmotor symptom in patients with Parkinson disease (PD) but the correct diagnosis of the respective cause remains difficult because suitable tools are lacking, so far. We developed a framework to differentiate PD- from non-PD-related pain and classify PD-related pain into 3 groups based on validated mechanistic pain descriptors (nociceptive, neuropathic, or nociplastic), which encompass all the previously described PD pain types. Severity of PD-related pain syndromes was scored by ratings of intensity, frequency, and interference with daily living activities. The PD-Pain Classification System (PD-PCS) was compared with classic pain measures (ie, brief pain inventory and McGill pain questionnaire [MPQ], PDQ-8 quality of life score, MDS-UPDRS scores, and nonmotor symptoms). 159 nondemented PD patients (disease duration 10.2 ± 7.6 years) and 37 healthy controls were recruited in 4 centers. PD-related pain was present in 122 patients (77%), with 24 (15%) suffering one or more syndromes at the same time. PD-related nociceptive, neuropathic, or nociplastic pain was diagnosed in 87 (55%), 25 (16%), or 35 (22%), respectively. Pain unrelated to PD was present in 35 (22%) patients. Overall, PD-PCS severity score significantly correlated with pain's Brief Pain Inventory and MPQ ratings, presence of dyskinesia and motor fluctuations, PDQ-8 scores, depression, and anxiety measures. Moderate intrarater and interrater reliability was observed. The PD-PCS is a valid and reliable tool for differentiating PD-related pain from PD-unrelated pain. It detects and scores mechanistic pain subtypes in a pragmatic and treatment-oriented approach, unifying previous classifications of PD-pain.

Pain in Parkinson's Disease: Current Concepts and a New Diagnostic Algorithm.

BACKGROUND: Pain is a significant burden for patients with Parkinson's disease (PD) with a high impact on quality of life. The present article aims at summarizing epidemiological, pathophysiological, clinical, and neurophysiological data regarding pain in PD. METHODS: In this domain, a procedure of systematic assessment is still lacking for the syndromic diagnosis and should take into account pain characteristics, effects of dopaminergic treatment, motor fluctuations, and non-PD-associated pain. FINDINGS: We propose an original questionnaire addressing an algorithm suitable for daily clinical practice. The questionnaire is based on a three-step approach addressing first the relationship between pain and PD (including temporal relationship with the course of the disease, association with motor fluctuations, and impact of antiparkinsonian treatment), before classifying pain into one of three main syndromes (i.e., musculoskeletal pain, psychomotor restlessness pain, and neuropathic pain). CONCLUSIONS: The proposed questionnaire allows the characteristics of each pain type to be determined according to its relationship with the disease and its treatment. The validation of the clinical use of this questionnaire will be the goal of a forthcoming work.

[Scores and stages in neurology]. / Scores und Stadien in der Neurologie.

Neurological scores and stages are helpful for quantifying functional deficits and describing neurological disorders in a standardized way. These assessments may support evidence-based diagnostic or therapeutic decisions-making and accurate evaluation of treatment options. Unfortunately most of the frequently used scores and stages in neurology do not fulfill the quality requirements in respect of reliability, validity and responsiveness (sensitivity, specifity). On the other hand, more valid assessments are often limited by their complexity and high expenditure of time. In addition even complex scores are describing only limited aspects of disorders sometimes mixing different domains of health. Accurate clinical observation and precise narrative description of clinical phenomena and diseases therefore remains an important task in comprehensive recording and presentation or neurological disorders.

Rehabilitation interventions in multiple sclerosis: an overview.

Multiple sclerosis is a complex, heterogeneous disease associated with long-term disability. Despite the availability of advanced disease-modifying and symptomatic therapies that may decrease activity and progression of disease and alleviate complaints to a certain extent, there is still a need for comprehensive rehabilitation interventions in order to reduce sequels and symptoms of the disease on personal activities and social participation to achieve the highest possible independence and the best quality of life. Timing and setting of rehabilitation interventions should be selected individually depending on disease phase, functional deficits, personal requirements, as well as specific goals. In addition, limitations and disease-specific characteristics that may influence rehabilitation outcome should be noted. Rehabilitation interventions should be considered early for maintaining functional capacity and reducing risk for losing important abilities or independence. Due to gradual failure of adaptive compensatory mechanisms along the course of disease, benefits of rehabilitation interventions are generally higher in earlier phases of MS. Inpatient and outpatient multidisciplinary rehabilitation has been shown to be beneficial in improving disability, participation and quality of life despite progression of the disease. Good evidence exists for different specific interventions improving physical and cognitive performance. Other important issues responsible for beneficial effects of comprehensive rehabilitation in MS include education, instruction, and information of patients and caregivers. Comprehensive assessment of health domains in MS patients using standardized framework and common language for describing the impact of disease at different levels, using International Classification of Functioning, Disability and Health (ICF) core sets may increase the knowledge of needs of these patients for more efficient and adapted rehabilitation interventions meeting these individual requirements, and promote perception and acceptance of rehabilitation as a valuable treatment option in MS. ICF core sets may increase the knowledge of more efficient and adapted rehabilitation measures meeting more properly individual requirements, and promote perception and acceptance of rehabilitation as a valuable treatment option in MS.

Potential effectiveness of three different treatment approaches to improve minimal to moderate arm and hand function after stroke--a pilot randomized clinical trial.

OBJECTIVE: To test a study design and explore the feasibility and potential effects of conventional neurological therapy, constraint induced therapy and therapeutic climbing to improve minimal to moderate arm and hand function in patients after a stroke. METHOD: A pilot study with six-month follow-up in patients after stroke with minimal to moderate arm and hand function admitted for inpatient rehabilitation was performed. Participants were randomly allocated to one of three treatment approaches. Main outcomes were improvement of arm and hand function and adverse effects. RESULTS: 283 patients with stroke were screened for inclusion over a two-year period, out of which fourtyfour were included. All patients could be treated according to the protocol. Improvement of arm and hand function was significantly higher in conventional neurological therapy and constraint induced therapy compared with therapeutic climbing at discharge, and at six months follow-up (P < 0.05, effect size = 0.56-0.76). No significant differences in arm and hand function were observed between constraint induced therapy and conventional neurological therapy. Constraint induced therapy participants were significantly less at risk of developing shoulder pain at six months follow-up compared with the other participants (P < 0.05, effect size = 0.82 and 1.79, respectively). CONCLUSIONS: The study design needs adaptation to accommodate the stringent inclusion criteria leading to prolonged study duration. Constraint induced therapy seems to be the optimal approach to improve arm and hand function and minimize the risk of shoulder pain for patients with minimal to moderate arm hand function after stroke in the intermediate term.

Assessment of gait parameters and fatigue in MS patients during inpatient rehabilitation: a pilot trial.

Gait impairment and fatigue are common and disabling problems in multiple sclerosis (MS). Characterisation of abnormal gait in MS patients has been done mainly using observational studies and simple walking tests providing only limited quantitative and no qualitative data, or using intricate and time-consuming assessment procedures. In addition, the correlation of gait impairments with fatigue is largely unknown. The aim of this study was to characterise spatio-temporal gait parameters by a simple and easy-to-use gait analysis system (GAITRite®) in MS patients compared with healthy controls, and to analyse changes and correlation with fatigue during inpatient rehabilitation. Twenty-four MS patients (EDSS <6.5) admitted for inpatient rehabilitation and 19 healthy subjects were evaluated using the GAITRite® Functional Ambulation System. Between-group differences and changes of gait parameters during inpatient rehabilitation were analysed, and correlation with fatigue, using the Wurzburg Fatigue Inventory for Multiple Sclerosis (WEIMuS), was determined. Compared to healthy controls MS patients showed significant impairments in different spatio-temporal gait parameters, which showed a significant improvement during inpatient rehabilitation. Different gait parameters were correlated with fatigue physical score, and change of gait parameters was correlated with improvement of fatigue. Spatio-temporal gait analysis is helpful to assess specific walking impairments in MS patients and subtle changes during rehabilitation. Correlation with fatigue may indicate a possible negative impact of fatigue on rehabilitation outcome.

Symptomatic therapy and neurorehabilitation in multiple sclerosis.

Multiple sclerosis (MS) is associated with a variety of symptoms and functional deficits that result in a range of progressive impairments and handicap. Symptoms that contribute to loss of independence and restrictions in social activities lead to continuing decline in quality of life. Our aim is to give an updated overview on the management of symptoms and rehabilitation measures in MS. Appropriate use of these treatment options might help to reduce long-term consequences of MS in daily life. First, we review treatment of the main symptoms of MS: fatigue, bladder and bowel disturbances, sexual dysfunction, cognitive and affective disorders, and spasticity. Even though these symptomatic therapies have benefits, their use is limited by possible side-effects. Moreover, many common disabling symptoms, such as weakness, are not amenable to drug treatment. However, neurorehabilitation has been shown to ease the burden of these symptoms by improving self-performance and independence. Second, we discuss comprehensive multidisciplinary rehabilitation and specific treatment options. Even though rehabilitation has no direct influence on disease progression, studies to date have shown that this type of intervention improves personal activities and ability to participate in social activities, thereby improving quality of life. Treatment should be adapted depending on: the individual patient's needs, demands of their surrounding environment, type and degree of disability, and treatment goals. Improvement commonly persists for several months beyond the treatment period, mostly as a result of reconditioning and adaptation and appropriate use of medical and social support at home. These findings suggest that quality of life is determined by disability and handicap more than by functional deficits and disease progression.

Stroke rehabilitation in Switzerland versus the United States: a preliminary comparison.

This article compares the structure and process of rehabilitation for stroke patients at 2 internationally recognized rehabilitation hospitals, Klinik Valens ("Valens") in Switzerland and the William Donald Schaeffer Rehabilitation Hospital at Kernan ("Kernan") in the United States. Although the patient mix, structure, and process of rehabilitation were similar in many regards, there were some important differences. Most notably, on average, patients at the U.S. hospital were discharged from rehabilitation at approximately the same day poststroke that rehabilitation began in Switzerland. Patients remained in an inpatient setting an average of 40 days longer in Switzerland (for the combination of acute care and rehabilitation) and had significantly higher levels of functioning at discharge when compared to their U.S. counterparts. The authors' findings suggest that Europe may offer opportunities for rehabilitation research that would be difficult to duplicate in the United States and highlight policy-relevant questions for future studies aimed at developing efficient managed care systems for stroke survivors.

Handlebar palsy--a compression syndrome of the deep terminal (motor) branch of the ulnar nerve in biking.

We describe 3 patients who developed a severe palsy of the intrinsic ulnar supplied hand muscles after bicycle riding. Clinically and electrophysiologically all showed an isolated lesion of the deep terminal motor branch of the ulnar nerve leaving the hypothenar muscle and the distal sensory branch intact. This type of lesion at the canal of Guyon is quite unusual, caused in the majority of cases by chronic external pressure over the ulnar palm. In earlier reports describing this lesion in bicycle riders, most patients experienced this lesion after a long distance ride. Due to the change of riding position and shape of handlebars (horn handle) in recent years, however, even a single bicycle ride may be sufficient to cause a lesion of this ulnar branch. Especially in downhill riding, a large part of the body weight is supported by the hand on the corner of the handlebar leading to a high load at Guyon's canal. As no sensory fibres are affected, the patients are not aware of the ongoing nerve compression until a severe lesion develops. Individual adaptation of the handlebar and riding position seems to be crucial for prevention of this type of nerve lesion.