Browsing by Author "Hillier, Susan"

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    An analysis of trunk kinematics and gait parameters in people with stroke
    (AOSIS, 2018) Titus, Adnil W.; Hillier, Susan; Louw, Quinette A.; Inglis-Jassiem, Gakeemah
    Background: Approximately two out of three people with stroke experience gait problems. Trunk movement control and symmetry is an important prerequisite for functional walking gait. Movement control, measured objectively as kinematics during walking gait, is rarely investigated. Objective: To describe the three-dimensional (3D) kinematics of the trunk during gait in people with stroke, including key spatiotemporal characteristics. Methodology: A total of 17 adults with stroke who met the inclusion criteria were selected to participate in this cross-sectional pilot study. An eight-camera T-10 Vicon system with Nexus 1.8 software (Vicon Motion System Limited, Oxford, UK) was used to analyse the 3D kinematics of the trunk during self-selected walking speed. Trunk kinematics throughout the gait cycle and spatiotemporal parameters were extracted using custom-built scripts in MATLAB used at the Stellenbosch University Movement Analysis Laboratory. Stata Version 12.1 software was used to assess differences in trunk kinematics between the affected and unaffected sides during gait using the Sign test (statistical significance level p < 0.05). Results: Participants achieved functional gait speeds although they presented with asymmetrical trunk kinematics. During the full gait cycle, there were statistically significant differences of trunk motion between the affected and unaffected sides in the coronal plane (p < 0.001). There were statistically significant differences in the trunk kinematics between the affected side and unaffected sides at initial contact (p < 0.001) and foot off (p < 0.049) in the coronal plane as well as at initial contact (p < 0.000) and foot off (p < 0.013) in the transverse plane. Conclusion: This pilot study found significant asymmetry in trunk motion between the affected and unaffected sides that varied across the gait cycle. This suggests the trunk may need to be targeted in clinical gait retraining post-stroke.
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    The effectiveness of a chair intervention in the workplace to reduce musculoskeletal symptoms : a systematic review
    (BioMed Central, 2012-08) Van Niekerk, Sjan-Mari; Louw, Quinette Abigail; Hillier, Susan
    Background: Prolonged sitting has been associated with musculoskeletal dysfunction. For desk workers, workstation modifications frequently address the work surface and chair. Chairs which can prevent abnormal strain of the neuromuscular system may aid in preventing musculo-skeletal pain and discomfort. Anecdotally, adjustability of the seat height and the seat pan depth to match the anthropometrics of the user is the most commonly recommended intervention. Within the constraints of the current economic climate, employers demand evidence for the benefits attributed to an investment in altering workstations, however this evidence-base is currently unclear both in terms of the strength of the evidence and the nature of the chair features. The purpose of this study was to evaluate the evidence for the effectiveness of chair interventions in reducing workplace musculoskeletal symptoms. Methods: Pubmed, Cinahl, Pedro, ProQuest, SCOPUS and PhysioFocus were searched. ‘Ergonomic intervention’, ‘chair’, ‘musculoskeletal symptoms’, ‘ergonomics’, ‘seated work’ were used in all the databases. Articles were included if they investigated the influence of chair modifications as an intervention; participants were in predominantly seated occupations; employed a pre/post design (with or without control or randomising) and if the outcome measure included neuro-musculoskeletal comfort and/or postural alignment. The risk of bias was assessed using a tool based on The Cochrane Handbook. Results: Five studies were included in the review. The number of participants varied from 4 to 293 participants. Three of the five studies were Randomised Controlled Trials, one pre and post-test study was conducted and one single case, multiple baselines (ABAB) study was done. Three studies were conducted in a garment factory, one in an office environment and one with university students. All five studies found a reduction in self-reported musculoskeletal pain immediately after the intervention. Bias was introduced due to poor randomization procedures and lack of concealed allocation. Meta-analysis was not possible due to the heterogeneity of the data (differing population, intervention and outcomes across studies). Conclusion: The findings of this review indicate a consistent trend that supports the role of a chair intervention to reduce musculoskeletal symptoms among workers who are required to sit for prolonged periods. However the amount, level and quality of the evidence are only moderate therefore we cannot make strong recommendations until further trials are conducted. The review also highlights gaps: for example in showing whether the effectiveness of a chair intervention has long-term impact, particularly with respect to musculoskeletal symptoms, as well as the recurrence of symptoms and the consequent cost of care.
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    Patient perspectives about the healthcare of chronic musculoskeletal pain : three patient cases
    (AOSIS Publishing, 2016-05) Ernstzen, Dawn; Louw, Quinette; Hillier, Susan
    Background: Consideration of the patient’s perspective in healthcare is important because it may inform holistic and contextually relevant management strategies. Objectives: The purpose of this study was to explore patients’ experiences and perspectives about their chronic musculoskeletal (CMSK) pain and its management in the private healthcare sector in South Africa. This work was done as a pilot study to test, adapt and finalize an interview schedule. Methods: A descriptive, qualitative study was conducted. The sampling was purposive. Three patients with CMSK pain were recruited to participate in in-depth individual interviews. The interviews were recorded and transcribed ensuring confidentiality. Inductive, thematic content analyses of the transcripts were undertaken. Initial codes were assigned and a code book developed, which was applied to the transcripts to develop categories and themes. Results: Four themes emerged from the data: (1) the participants sought understanding about the pain’s origin and the reason for pain persistence; (2) pain impacted their lives in multiple ways; (3) the participants depended on healthcare providers (HCP) for guidance and support; and (4) they had the option of acceptance of chronic pain. Conclusion: The participants’ knowledge about their health condition had important implications as it influenced their perspectives on pain and its management. The pain presented the participants with several challenges, which included developing an understanding about pain and coping with the impact of pain in their lives. HCPs were perceived to play an important role in empowering or disempowering the participants.