Effects of Ai-Chi Practice on Balance and Left Cerebellar Activation during High Working Memory Load Task in Older People: A Controlled Pilot Trial.

BACKGROUND: Normal aging is associated with balance and working memory decline. From a neurobiological standpoint, changes in cerebellar functional plasticity may mediate the decline in balance and working memory for older adults. Mounting evidence suggests that physical activity is beneficial for decreasing aging effects. Previous studies have focused on land-based physical activity and research concerning the aquatic environment is scarce. This study investigated the effectiveness of Ai-Chi on balance abilities and cerebral activation during a high working memory load task among community-dwelling older people. METHODS: A total of 19 people aged 65-86 years were allocated to receive Ai-Chi practice (n = 6), structured on-land Ai-Chi practice (n = 7) or guided-imagery of Ai-Chi practice (n = 6) for a bi-weekly, 30-min exercise session for 12 weeks. Balance was measured by the Tinetti balance sub-test and working memory was measured by the N-back test during functional-MRI scan. RESULTS: The Ai-Chi practice group presented a significant change in balance between pre and post intervention (balance t = -4.8, p < 0.01). In the whole-brain analysis, during high working memory load task, the Ai-Chi practice group presented a decrease in left cerebellar activation. Region of interest analyses yielded similar results by which pre-cerebellar activation was higher than post-intervention (t = 2.77, p < 0.05). CONCLUSIONS: Ai-Chi is an available, non-invasive intervention method that may serve as a tool to improve cerebellar activation that in turn might improve balance. In addition, our findings may provide new insights into the neuronal mechanisms that underlie both motor and cognitive abilities.

Efficacy of a telerehabilitation intervention programme using biofeedback among computer operators.

Computer operators spend long periods of time sitting in a static posture at computer workstations and therefore have an increased exposure to work-related musculoskeletal disorders (WRMSD). The present study is aimed at investigating the feasibility and effectiveness of a tele-biofeedback ergonomic intervention programme among computer operators suffering from WRMSD. Twelve subjects with WRMSD were assigned an ergonomic intervention accompanied by remote tele-biofeedback training, which was practised at their workstations. Evaluations of pain symptoms and locations, body posture and psychosocial characteristics were carried out before and after the intervention in the workplace. The hypothesis was partially verified as it showed improved body position at the workstation and decreased pain in some body parts. Tele-biofeedback, as part of an intervention, appears to be feasible and efficient for computer operators who suffer from WRMSD. This study encourages further research on tele-health within the scope of occupational therapy practice. Practitioner summary: Research concerning tele-health using biofeedback is scarce. The present study analyses the feasibility and partial effectiveness of a tele-biofeedback ergonomic intervention programme for computer operators suffering from WRMSD. The uniqueness and singularity of this study is the usage of remote communication between participants and practitioners through the Internet.

Complementary contribution of parents and therapists in the assessment process of children.

BACKGROUND/AIM: Traditional developmental models assume that the underlying capacities of children contribute to their participation. In this framework, preschoolers who are referred for occupational therapy services usually undergo an assessment intended to identify capacities in certain domains. Contrary to this, newer ecological models assume that child participation is a consequence of a multidimensional interaction between personal and environmental factors. As a result clinicians are increasingly focusing their assessment on performance and participation. This study aimed to assess the correlation between children's performance skills, their capacities and participation; and to explore whether parents' observations, alongside therapist observations and standardised assessments, contribute to an enhanced understanding of child participation. METHOD: Participants included 188 parents and their children, aged 4-6 years, with and without mild developmental difficulties. Data were collected using standardised assessments for child capacities, and questionnaires completed by parents and occupational therapists regarding child participation and performance skills. RESULTS: Significant correlations were found between parent assessments of child performance skills and child participation, but not with child capacities. The opposite was found to be true for occupational therapist assessments of child performance skills which were found to correlate with child capacities, but not with participation. Additionally, an interaction effect was found for both groups. Occupational therapists reported higher performance skills as compared to parents, but the difference was only significant for children without mild difficulties. CONCLUSION: As suggested by ecological models of child participation, the findings highlight the importance of parent-therapist collaboration in the assessment process of children.