Cognitive strategy use in adults with acquired brain injury.

Objective: Difficulty applying cognitive strategies during task performance is a hallmark feature of brain injury. This study aimed to develop a cognitive strategy profile of people living in a transitional living unit for people with brain injury.Research design: Prospective, longitudinal study (n = 16)Method: Cognitive strategy application was assessed using the Perceive, Recall, Plan, and Perform (PRPP) System of Task Analysis. Functional measures were also administered. Data were examined using Rasch analysis (FACETS 3.71.4) and relationships between variables were analyzed.Results: Rasch analysis of PRPP data generated a hierarchy of cognitive strategies: from the most complex executive processing strategies to the simplest perceptual and recall strategies. The functional profile revealed a more impaired group of clients than has been previously reported in similar residential programs. Cognitive strategy use (PRPP Total score) was correlated with functional independence (r = .61), the performance of instrumental activities of daily living (r = .45), and community participation (r = -.63).Conclusions: The PRPP System enabled assessment of cognitive strategy difficulties and generation of individual profiles that allowed for individualized intervention planning. More efficient and effective application of cognitive strategies was related to the improved functional performance of everyday tasks and activities, greater independence and community participation.

Applied cognitive strategy behaviours in people with parkinson's disease during daily activities: A cross-sectional study.

OBJECTIVE: To explore the use of applied cognitive strategy behaviours during performance of daily activities in people with Parkinson's disease. DESIGN: Quantitative cross-sectional design. METHODS: A total of 190 persons living at home with non-dementing Parkinson's disease were videotaped while performing a self-chosen activity in their natural environment. The videotaped performance was scored using the "Perceive, Recall, Plan and Perform System of Task Analysis" to measure: (i) performance mastery; and (ii) effective use of 34 cognitive strategy behaviours covering: attention and sensory processing (Perceive), accessing task-related knowledge (Recall), response planning and evaluation (Plan) and performance control (Perform). Mean performance mastery and a hierarchy of least to most effective applied cognitive strategy behaviours were determined for the total group and for 2 sub-groups based on disease severity. A multi-faceted Rasch model was used for data analysis. RESULTS: Mean performance mastery was 56% (standard deviation (SD) 28). Least efficient cognitive strategy behaviours were those used for planning, evaluating and controlling performance and most efficient strategies were those used for sensory discrimination and recalling factual information. More advanced disease indicated less efficient use of applied cognition. CONCLUSION: The results suggest that the efficiency of applied cognitive strategy behaviours is compromised in a certain pattern in people with Parkinson's disease, and that it declines with disease progression.

The impact of compensation on late mortality after traumatic brain injury: A multi-centre study.

OBJECTIVES: To determine the impact of financial compensation on long-term mortality in adults with severe traumatic brain injury (TBI). DESIGN, SETTING AND PARTICIPANTS: An inception cohort of 2545 adults consecutively discharged from three metropolitan, post-acute inpatient rehabilitation services of the NSW Brain Injury Rehabilitation Programme from 1 July 1990 to 1 October 2007. MAIN OUTCOME MEASURE: Survival status at 1 October 2009. RESULTS: Compensation data were available for 1851 (73%) participants, with 826 (45%) receiving financial compensation. Yearly standardized mortality ratios remained elevated above general population norms for six to ten years for both groups. Compensation had a protective effect on mortality risk as a univariate predictor. However, when considered in multivariate Cox regression analysis, compensation had minimal effect on mortality risk when modelled with non-modifiable demographic factors and pre-existing medical history. Conversely, compensation trended towards a protective effect when modelled with post-injury variables. CONCLUSIONS: Financial compensation had a protective effect against late mortality following rehabilitation for severe TBI through complex interactions with rehabilitation service variables but not with injury-related variables. This finding suggests that wider access to compensation (and hence rehabilitation) through recently implemented schemes (e.g., NSW Lifetime Care and Support) may further improve life expectancy for this clinical population.

Quantifying patterns of upper limb motor change following BTX-A injection in adult spasticity management.

OBJECTIVE: To evaluate the capacity of the Upper Limb Performance Analysis: Comparative Analysis of Performance-Motor (CAP-M) to quantify change in adults with focal spasticity following injection of Botulinum Toxin-A (BTX-A) as a focal treatment for positive Upper Motor Neuron (UMN) features. METHODS: Twenty-three adults with moderate-to-severe spasticity were assessed pre- and post-BTX-A injection using CAP-M. Post-hoc video analysis of three sub-tests from the Action Research Arm Test were analysed against expected movements for each task. RESULTS: Post-injection, spasticity as measured by Modified Ashworth and Tardieu Composite scores decreased significantly (p < 0.001). Grouped CAP-M data showed a significant reduction (z = 2.1-2.7, ES = 0.51-0.56) in positive UMN features, with 145 fewer Excessive movements recorded. In addition, 31 more Expected movements were demonstrated (z = 2.9, ES = 0.60), consistent with 'unmasking' of movements. CONCLUSION: CAP-M analysis revealed that BTX-A injection decreased unwanted movement almost 5-times more frequently than 'unmasking' hidden voluntary muscle activity during active simulated tasks. In this way, CAP-M was able to simultaneously assess positive and negative UMN features. This quantitative framework may have greater functional relevance than traditional uni-dimensional, passive spasticity measures such as MAS and Tardieu Scale.

Measuring task performance after acquired brain injury: Construct and concurrent validity of 'Upper Limb Performance Analysis'.

OBJECTIVE: This preliminary investigation studies selected aspects of validity of the Upper Limb Performance Analysis (ULPA), an occupation-based functional upper limb (UL) measure. METHODS: The study investigated the ULPA-Task Performance Mastery (ULPA-TPM) in 35 community dwelling adults with upper motor neuron syndrome following acquired brain injury and 26 healthy controls. Construct and concurrent validity of the ULPA were determined via group discrimination between adults with and without ABI; and ABI participants who were and were not referred for UL spasticity management with botulinum toxin-A injections (injected and non-injected group). Concurrent validity was examined by investigating the relationships between the ULPA and an existing functional UL measure, the Action Research Arm Test, using Spearman's rank-order correlation. RESULTS: Significant differences in UL performance were demonstrated between the ABI and the Control group on all ULPA sub-scales (including: Omission (z = -2.6 to -3.6, rspb = 0.37-0.48), Accuracy (z = -5.8 to -6.0, rspb = 0.78-0.82), Repetition (z = -5.1 to -5.4, rspb = 0.63-0.73) and Timing errors (z = -5.9 to -6.2, rspb = 0.77-0.88). Those in the Injected group demonstrated more task performance errors than the Non-injected group, with significant differences in Accuracy (z = -2.1 to -2.4, rspb = 0.37-0.45), Repetition (z = -2.5 to -2.1, rspb = 0.43) and Timing (z = -2.0, rspb = 0.37). CONCLUSIONS: This study demonstrated good construct and concurrent validity of the ULPA-TPM.

Measuring spasticity and fine motor control (pinch) change in the hand after botulinum toxin-A injection using dynamic computerized hand dynamometry.

OBJECTIVES: To evaluate change in fine motor hand performance and to investigate the relationship between existing clinical measures and dynamic computerized dynamometry (DCD) after botulinum toxin-A (BTX-A) injections for adults with upper limb spasticity. DESIGN: Pretest/posttest clinical intervention study. SETTING: Hospital outpatient spasticity clinics. PARTICIPANTS: A convenience sample of adults (N=28; mean age, 51y) with upper limb spasticity after acquired brain injury. INTERVENTIONS: BTX-A injections for upper limb spasticity management. MAIN OUTCOME MEASURES: DCD protocol using a piezoelectric pinch meter (termed DCD[pinch]); current clinical upper limb measures: Modified Ashworth Scale, Tardieu Scale, Action Research Arm Test, Michigan Hand Outcomes Questionnaire, and Goal Attainment Scale. RESULTS: BTX-A produced a significant change on DCD(pinch) and some current clinical measures, with correlations observed between DCD(pinch) and current clinical measures. CONCLUSIONS: DCD(pinch) sensitively and objectively assessed the effects of BTX-A on upper limb spasticity during a simulated functionally based pinch and release task.