Quantitative assessment of upper limb functional impairments in people with Parkinson's disease

How do people with Parkinson's disease perceive challenges in handling cutlery? - A mixed study

Aim: Investigate the experiences, challenges, and difficulties faced by people with Parkinson's disease (PD) when using standard cutlery during meals and explore their preferences for features in assistive cutlery.

Methods: This study employed a mixed-methods, narrative, and descriptive approach using phenomenological methodology. Data were collected in two phases: Phase 1 focused on understanding participants' experiences and difficulties through phone or video interviews, while Phase 2 involved home visits to evaluate their preferences for cutlery features. Structured interviews with open- and closed-ended questions were transcribed and analyzed thematically. Analyst triangulation was employed to ensure reliability.

Results: Phase one included 41 participants, while phase two included 15. Most participants reported difficulties using standard cutlery, citing challenges such as spills and reduced grip stability. Despite these difficulties, few had prior experience with assistive devices. Barriers to using adaptive cutlery included lack of awareness, limited access, cost, and concerns about its appearance. Some participants reported feeling embarrassed, which led them to avoid dining with others. Suggestions for improving regular cutlery focused on increasing the depth of forks and spoons to minimize spills. Most participants expressed a preference for cutlery with textured handles, deeper bowls, and medium size and weight.

Conclusion: People with PD experience difficulties using regular cutlery, and few are aware of or use assistive devices. Participants expressed a desire for improvements in cutlery design that could improve their dining experience. Textured handles, medium size and weight, and deeper bowls were the most popular preferences among participants.These design improvements have the potential to enhance the dining experience and promote greater social participation among individuals with PD.

Upper extremity kinematics: development of a quantitative measure of impairment severity and dissimilarity after stroke

Background

Strokes are a leading cause of disability worldwide, with many survivors experiencing difficulty in recovering upper extremity movement, particularly hand function and grasping ability. There is currently no objective measure of movement quality, and without it, rehabilitative interventions remain at best informed estimations of the underlying neural structures' response to produce movement. In this article, we utilize a novel modification to Procrustean distance to quantify curve dissimilarity and propose the Reach Severity and Dissimilarity Index (RSDI) as an objective measure of motor deficits.

Methods

All experiments took place at the Medstar National Rehabilitation Hospital; persons with stroke were recruited from the hospital patient population. Using Fugl-Meyer (FM) scores and reach capacities, stroke survivors were placed in either mild or severe impairment groups. Individuals completed sets of reach-to-target tasks to extrapolate kinematic metrics describing motor performance. The Procrustes method of statistical shape analysis was modified to identify reaching sub-movements that were congruous to able-bodied sub-movements.

Findings

Movement initiation proceeds comparably to the reference curve in both two- and three-dimensional representations of mild impairment movement. There were significant effects of the location of congruent segments between subject and reference curves, mean velocities, peak roll angle, and target error. These metrics were used to calculate a preliminary RSDI score with severity and dissimilarity sub-scores, and subjects were reclassified in terms of rehabilitation goals as Speed Emphasis, Strength Emphasis, and Combined Emphasis.

Interpretation

The modified Procrustes method shows promise in identifying disruptions in movement and monitoring recovery without adding to patient or clinician burden. The proposed RSDI score can be adapted and expanded to other functional movements and used as an objective clinical tool. By reducing the impact of stroke on disability, there is a significant potential to improve quality of life through individualized rehabilitation.

Effect of immersive virtual reality training on hand-to-mouth task performance in people with Multiple Sclerosis: A quantitative kinematic study

BACKGROUND

Although the use of Virtual Reality (VR) has received increasing interest as an add-on treatment in neurorehabilitation programs in the last fifteen years, there is scarce information about the effectiveness of fully immersive VR-based treatments on upper limb (UL) motor function in people with Multiple Sclerosis (PwMS).

METHODS

In this bicentric 2-period interventional crossover study, 19 PwMS with moderate to severe disability (mean EDSS score 5.5) and relevant UL impairment underwent 12 immersive-VR sessions over a period of 4 weeks, using commercially available VR platform (Oculus Quest) and games (Fruit Ninja, Beat Saber and Creed - Rise to Glory). Possible changes associated with the treatment were objectively assessed through instrumental kinematic analysis of the "hand-to-mouth" (HTM) movement by means of optical motion capture system. Clinical tests to assess gross and fine manual dexterity (i.e., the Box and Blocks and Nine Hole Peg Test) were also administered.

RESULTS

The results of the kinematic analysis suggest that the VR training positively impacted the ability of the tested PwMS to perform the HTM task. In particular, a significant reduction of the overall time required to complete the task of approximately 20% for both most and least affected limb, and an improved degree of precision and stability of the movement, as indicated by the reduced value of adjusting sway, especially for the most affected limb (-60%).

CONCLUSION

Based on the results of the quantitative analysis, a 4-week treatment with immersive VR is able to improve speed and stability of the HTM movement in PwMS. This suggests that such an approach might be considered suitable to facilitate an immediate transfer of the possible positive effects associated with the training to common activities of daily living.

Wrist Movement Variability Assessment in Individuals with Parkinson's Disease

(1) Background: Parkinson’s disease (PD) is a neurodegenerative disorder represented by the progressive loss of dopamine-producing neurons, it decreases the individual’s motor functions and affects the execution of movements. There is a real need to include quantitative techniques and reliable methods to assess the evolution of PD. (2) Methods: This cross-sectional study assessed the variability of wrist RUD (radial and ulnar deviation) and FE (flexion and extension) movements measured by two pairs of capacitive sensors (PS25454 EPIC). The hypothesis was that PD patients have less variability in wrist movement execution than healthy individuals. The data was collected from 29 participants (age: 62.13 ± 9.7) with PD and 29 healthy individuals (60.70 ± 8). Subjects performed the experimental tasks at normal and fast speeds. Six features that captured the amplitude of the hand movements around two axes were estimated from the collected signals. (3) Results: The movement variability was greater for healthy individuals than for PD patients (p < 0.05). (4) Conclusion: The low variability seen in the PD group may indicate they execute wrist RUD and FE in a more restricted way. The variability analysis proposed here could be used as an indicator of patient progress in therapeutic programs and required changes in medication dosage.

Amplitude setting and dopamine response of finger tapping and gait are related in Parkinson's disease

Movement amplitude setting is affected early in Parkinson’s disease (PD), clinically manifesting as bradykinesia. Our objective was to determine if amplitude setting of upper limb bimanual movements and bipedal gait are similarly modulated in PD. 27 PD and 24 control participants were enrolled. Participants performed a bimanual anti-phase finger tapping task wearing gloves with joint angular sensors, and an instrumented gait assessment. Participants performed normal and fast paced assessments to vary motor load. PD participants were evaluated OFF (PD-OFF) and ON (PD-ON) levodopa. PD-OFF participants had smaller tap amplitude, and greater tap amplitude variability than controls in the more affected hands (all p < 0.05). Tap amplitude and stride length (p = 0.030) were correlated in PD-OFF. Tap amplitude was also correlated with motor UPDRS (p < 0.005) and bradykinesia motor (p < 0.05) and ADL (p < 0.005) UPDRS subscores. The relative amount of improvement in tap amplitude and stride length with levodopa was correlated. In PD, upper limb and gait amplitude setting are similarly scaled with motor demand and dopamine supplementation. This suggests these automated motor functions are subserved by common functional networks.

Age-Dependent Control of Shoulder Muscles During a Reach-and-Lift Task

Aging affects fatigability and is a risk factor for incurring a fatigue-related injury in the neck/shoulder region. Age-related changes in the electromyographical features of motor control may be partly responsible. Young (N = 17) and older (N = 13) adults completed a reach-and-lift task at their self-selected speed, before and after a fatiguing task targeting the neck/shoulder. Electromyography amplitude (root mean square), amplitude variability (root mean square coefficient of variation [CV]), functional connectivity (normalized mutual information [NMI]), and functional connectivity variability (NMI CV) were extracted from several muscles and analyzed for effects and interactions of age using general estimating equation models. Root mean square CV and deltoid NMI CV increased from pre- to postfatigue (ps < .05). Upper trapezius-deltoid NMI decreased for young, but increased for older adults, while the opposite response was found for lower trapezius-deltoid NMI (ps < .05). Older adults seem to adapt to fatigue in reach-and-lift movement with a cranial shift in control of the scapula.

A novel summary kinematic index for postural characterization in subjects with Parkinson's disease

BACKGROUND

Parkinson's disease (PD) is a progressive neurological disorder characterized, among other symptoms, by a significant modified posture. Although a detailed assessment of postural abnormalities can be performed using quantitative movement analysis, the output of such procedure might be not suitable for a routine clinical use due to its intrinsic complexity. However, synthetic measures may facilitate the interpretation of kinematic data for physicians and thus make such tools fully exploitable in daily practice.

AIM

According to these considerations, the aim of the present study is to propose a new summary index, the Postural Profile Score (PPS, together with its constituent variables: Postural Variable Scores [PVSs]), which can characterize the postural kinematic biomechanical profile of an individual; this approach was then applied to a cohort of individuals with PD.

DESIGN

Controlled observational study.

SETTING

Movement Analysis Laboratory of Hospital.

POPULATION

Forty-five individuals with PD in mild to severe disability stage, of mean age 65.9 (SD 8.3) years and 21 healthy control age-matched (CG) were tested using an optoelectronic system during bipedal quiet standing.

METHODS

Twelve joint angles of trunk and of lower limbs, considered representative of the whole-body posture according to Davis protocol, were acquired and the root mean square (RMS) difference between them and those of the unaffected participants (PVSs) were computed. Then, the PPS was calculated as a combination of the selected PVSs. The existence of possible differences between people with PD and controls for PPS and PVSs was assessed using MANOVA test. UPDRS III score was also considered in order to assess existence of correlation between synthetic indexes and Clinical scales values.

RESULTS

Significant differences in PPS were detected between PD and CG (8.59° vs. 6.11°, P<0.001) and in some of the considered PVS (Trunk Sagittal, Trunk Frontal, Trunk Transversal, Hip flexion-extension, Hip abdo-adduction and Knee flexion-extension). Significant positive correlations were found between Clinical scales Vs trunk and ankle orientation.

CONCLUSIONS

PPS could represent a reliable summary index of global postural abnormalities in people with PD, and in particular some PVSs appear more suitable to describe the deviation from a physiologic postural pattern. The results demonstrate that the posture in the patient with PD is modified compared to the control group. In particular, the trunk is the body district which mainly characterizes the alteration of the posture as documented by its PVSs values and their correlation with clinical evaluation scales. In conclusion, this study evidences the interest to measure the position of the trunk in order to characterize the postural kinematic position in individuals with PD.

CLINICAL REHABILITATION IMPACT

PPS could be a useful tool for the characterization of postural phenotype in subjects with Parkinson's disease and could provide indications for specific rehabilitation protocols.