TKA patients with unsatisfying knee function show changes in neuromotor synergy pattern but not joint biomechanics
dc.contributor.author | Ardestani, Marzieh M. | |
dc.contributor.author | Malloy, Philip | |
dc.contributor.author | Nam, Denis | |
dc.contributor.author | Rosenberg, Aaron G. | |
dc.contributor.author | Wimmer, Markus A. | |
dc.contributor.department | Physical Medicine and Rehabilitation, School of Medicine | en_US |
dc.date.accessioned | 2017-11-16T21:05:11Z | |
dc.date.available | 2017-11-16T21:05:11Z | |
dc.date.issued | 2017-12 | |
dc.description.abstract | Nearly 20% of patients who have undergone total knee arthroplasty (TKA) report persistent poor knee function. This study explores the idea that, despite similar knee joint biomechanics, the neuro-motor synergies may be different between high-functional and low-functional TKA patients. We hypothesized that (1) high-functional TKA recruit a more complex neuro-motor synergy pattern compared to low-functional TKA and (2) high-functional TKA patients demonstrate more stride-to-stride variability (flexibility) in their synergies. Gait and electromyography (EMG) data were collected during level walking for three groups of participants: (i) high-functional TKA patients (n = 13); (ii) low-functional TKA patients (n = 13) and (iii) non-operative controls (n = 18). Synergies were extracted from EMG data using non-negative matrix factorization. Analysis of variance and Spearman correlation analyses were used to investigate between-group differences in gait and neuro-motor synergies. Results showed that synergy patterns were different among the three groups. Control subjects used 5–6 independent neural commands to execute a gait cycle. High functional TKA patients used 4–5 independent neural commands while low-functional TKA patients relied on only 2–3 independent neural commands to execute a gait cycle. Furthermore, stride-to-stride variability of muscles’ response to the neural commands was reduced up to 15% in low-functional TKAs compared to the other two groups. | en_US |
dc.eprint.version | Author's manuscript | en_US |
dc.identifier.citation | Ardestani, M. M., Malloy, P., Nam, D., Rosenberg, A. G., & Wimmer, M. A. (2017). TKA Patients with unsatisfying Knee Function Show Changes in Neuromotor Synergy Pattern but not Joint Biomechanics. Journal of Electromyography and Kinesiology, 37, pp 90-100. https://doi.org/10.1016/j.jelekin.2017.09.006 | en_US |
dc.identifier.uri | https://hdl.handle.net/1805/14574 | |
dc.language.iso | en | en_US |
dc.publisher | Elsevier | en_US |
dc.relation.isversionof | 10.1016/j.jelekin.2017.09.006 | en_US |
dc.relation.journal | Journal of Electromyography and Kinesiology | en_US |
dc.rights | Publisher Policy | en_US |
dc.source | Author | en_US |
dc.subject | total knee arthroplasty | en_US |
dc.subject | electromyography | en_US |
dc.subject | neuro-motor synergy | en_US |
dc.title | TKA patients with unsatisfying knee function show changes in neuromotor synergy pattern but not joint biomechanics | en_US |
dc.type | Article | en_US |