Browsing by Person "Cowan, P."

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Experiences of functional electrical stimulation (FES) and ankle foot orthoses (AFOs) for foot-drop in people with multiple sclerosis
(Informa Healthcare, 2014-05-06) Bulley, Catherine; Mercer, Tom; Hooper, Julie; Cowan, P.; Scott, S.; van der Linden, Marietta
Purpose: A constructivist phenomenological study explored impacts of ankle foot orthoses (AFOs) or functional electrical stimulation (FES) on people with foot-drop from multiple sclerosis (MS). Method: Focus groups following topic guides were analysed using interpretative phenomenological analysis, with researcher reflexivity, participant verification and peer checking of analysis. Participants with sustained use of the devices (under 2 y) were invited from two quantitative studies that (a) investigated immediate FES effects (n_12) and (b) compared habitual use of AFO (n_7) or FES (n_6). Two focus groups addressed AFO (n_4) and FES (n_6) experiences. Results: Similar numbers of positive and negative aspects were described for AFO and FES. Both reduced fatigue, improved gait, reduced trips and falls, increased participation, and increased confidence; greater balance/stability was reported for AFOs, and increased walking distance, fitness and physical activity for FES. Barriers to both included avoiding reliance on devices and implications for shoes and clothing; a non-normal gait pattern was reported for AFO, and difficulties of application and limitations in the design of FES. However, participants felt the positives outweighed the negatives. Conclusions: Participants felt benefits outweighed the drawbacks for AFO and FES; greater understanding of user preferences and satisfaction may increase likelihood of usage and efficacy.
Gait kinematics of people with Multiple Sclerosis and the acute application of Functional Electrical Stimulation
(Elsevier, 2014-04) van der Linden, Marietta; Scott, S. M.; Hooper, Julie; Cowan, P.; Mercer, Tom
This study aimed to (i) compare the gait characteristics of people with Multiple Sclerosis (pwMS) to those of healthy controls walking at the same average speed, and (ii) assess the effects of the acute application of Functional Electrical Stimulation (FES) to the dorsiflexors. Twenty-two people with pwMS (mean age 49 years), prescribed FES, and 11 age matched healthy controls participated. Three dimensional gait kinematics were assessed whilst (i) pwMS and healthy controls walked at self-selected speeds (ssws), (ii) Healthy controls also walked at the average walking speed of the pwMS group, and (iii) people with MS walked using FES. Compared to healthy controls walking at their ssws, pwMS walked slower and showed differences in nearly all gait characteristics (p<0.001). Compared to healthy controls walking at the same average speed, pwMS still exhibited significantly shorter stride length (p=0.007), reduced dorsiflexion at initial contact (p=0.002), reduced plantar flexion at terminal stance (p=0.008) and reduced knee flexion in swing (p=0.002). However, no significant differences were seen between groups in double support duration (p=0.617), or hip range of motion (p=0.291). Acute application of FES resulted in a shift towards more normal gait characteristics, except for plantar flexion at terminal stance which decreased. In conclusion, compared to healthy controls, pwMS exhibit impairment of several gait characteristics that appear to be independent of the slower walking speed of pwMS. The acute application of FES improved most impaired gait kinematics. A speed matched control group is warranted in future studies of gait kinematics of pwMS.
Habitual Functional Electrical Stimulation Therapy Improves Gait Kinematics and Walking Performance, but Not Patient-Reported Functional Outcomes, of People with Multiple Sclerosis who Present with Foot-Drop
(2014-08-18) van der Linden, Marietta; Hooper, Julie; Cowan, P.; Weller, B.; Mercer, Tom
Background: People with Multiple Sclerosis (pwMS) often experience a disturbed gait function such as foot-drop. The objective of this pilot study was to investigate the medium term effects of using Functional Electrical Stimulation (FES) to treat foot-drop over a period 12 weeks on gait and patient reported outcomes of pwMS. Methods and Findings: Nine pwMS aged 35 to 64 (2 males, 7 females) were assessed on four occasions; four weeks before baseline, at baseline and after six weeks and twelve weeks of FES use. Joint kinematics and performance on the 10 meter and 2 minute walk tests (10WT, 2 minWT) were assessed with and without FES. Participants also completed the MS walking Scale (MSWS), MS impact scale (MSIS29), Fatigue Severity Score (FSS) and wore an activity monitor for seven days after each assessment. Compared to unassisted walking, FES resulted in statistically significant improvements in peak dorsiflexion in swing (p = 0.006), 10MWT (p = 0.006) and 2 minWT (p = 0.002). Effect sizes for the training effect, defined as the change from unassisted walking at baseline to that at 12 weeks, indicated improved ankle angle at initial contact (2.6u, 95% CI 21u to 4u, d = 0.78), and a decrease in perceived exertion over the 2 min walking tests (21.2 points, 95% CI 25.7 to 3.4, d =20.86). Five participants exceeded the Minimally Detectable Change (MDC) for a training effect on the 10mWT, but only two did so for the 2 minWT. No effects of the use of FES for 12 weeks were found for MSWS, MSIS29, FSS or step count. Conclusion: Although FES to treat foot-drop appears to offer the potential for a medium term training effect on ankle kinematics and walking speed, this was not reflected in the patient reported outcomes. This observed lack of relationship between objective walking performance and patient reported outcomes warrants further investigation.
Pilates for people with multiple sclerosis who use a wheelchair: feasibility, efficacy and participant experiences
(Taylor & Francis Ltd, 2013-08) van der Linden, Marietta; Bulley, Catherine; Geneen, Louise; Hooper, Julie; Cowan, P.; Mercer, Tom
Purpose: This mixed methods study aimed to explore the feasibility, efficacy and the participants' experiences of a Pilates programme for people with Multiple Sclerosis (pwMS) who use a wheelchair. Method: Fifteen pwMS took part in the 12-week Pilates programme. At baseline and after 6 and 12 weeks of the programme, sitting stability, measured as maximum progression of the Centre of Pressure when leaning sideways (COPmax), posture, pain on a Visual Analogue Scale, function, fatigue and the impact of MS (MSIS29) were assessed. Ten participants took part in two focus groups within six weeks of the completion of the programme. Results: Significant improvements at the 12-week assessment were found in COPmax (p-=-0.046), sitting posture (p-=-0.004), pain in the shoulders (p-=-0.005) and back (p-=-0.005) and MSIS29 (p-=-0.006). The majority of participants described various physical, functional, psychological and social benefits from participation that reflected increased confidence in activities of daily living. Enjoyment of the classes was expressed by all, and most wished to continue participation. Conclusions: Pilates appears to be efficacious in improving sitting stability and posture and decreasing pain and was also well tolerated by wheelchair users with MS. Further mixed methods studies are warranted.Implications for Rehabilitation
Quantification of gait kinematics and walking ability of people with multiple sclerosis who are new users of functional electrical stimulation
(Taylor & Francis, 2013-03) Scott, S. M.; van der Linden, Marietta; Hooper, Julie; Cowan, P.; Mercer, Tom
Objective: To assess whether the application of Functional Electrical Stimulation improves gait kinematics and walking ability in people with multiple sclerosis who experience foot drop. Design: Acute open labelled comparative observation trial. Participants: Twelve people (3 females, 9 males, EDSS 2-4) with relapsing remitting multiple sclerosis (47.8 years (standard deviation 6.6)) who were new users of functional electrical stimulation. Methods: Gait kinematics were recorded using 3D gait analysis. Walking ability was assessed through the 10-m walk test and the 6-min walk test. All assessments were performed with and without the assistance of functional electrical stimulation. The effect of functional electrical stimulation was analysed using paired t-tests. Results: Ankle dorsiflexion at initial contact (p-=-0.026), knee flexion at initial contact (p-=-0.044) and peak knee flexion during swing (p-=-0.011) were significantly greater whilst walking with Functional Electrical Stimulation. The increased peak dorsiflexion in swing of nearly 4 degrees during functional electrical stimulation assisted walking approached significance (p-=-0.069). The 10-m walk time was significantly improved by functional electrical stimulation (p-=-0.004) but the 6 min walk test was not. Conclusion: The acute application of functional electrical stimulation resulted in an orthotic effect through a change in ankle and knee kinematics and increased walking speed over a short distance in people with multiple sclerosis who experience foot drop