Abstract:
BACKGROUND:Degenerative lumbar diseases (DLDs) are characterized by motor functional deficits and postural instability. In this study, we investigated the differences in the trunk muscle responses to postural control between the presurgical DLD patients and healthy individuals while performing the static and perturbed balance tasks. METHODS:Thirty-five DLD patients (aged 61.1 ± 8.0 years) and thirty-five asymptomatic controls (aged 62.9 ± 3.7 years) participated in this study. All participants stood on a force plate and performed the quiet standing (QS) and in situ weight-lifting (WL) tasks. The participants' performance in the QS task was tested under the eyes-open, eyes-closed, wide-base, and narrow-base conditions. Center of pressure (CoP) movements and electromyography of the erector spinae (ES) were recorded. The Mann-Whitney U test was applied for statistical analysis. RESULTS:The DLD group showed a significantly greater CoP movements and muscle activations during the QS task. Nevertheless, smaller CoP movements were noted during the WL task in the DLD group. Under the eyes-closed and narrow-base conditions, the DLD group showed even higher muscle activations and CoP movements. SIGNIFICANCE:The DLD patients demonstrated a poor postural control ability and tended to rely on the visual feedback and wide-base standing posture. A rigid and restricted posture was also adopted during the perturbed WL task. A high level of ES activation was required to maintain their postural steadiness. This study reveals an aberrant pattern of postural control and trunk muscle activations in symptomatic DLD patients which potentially contributes to the development of beneficial rehabilitation programs.
journal_name
Gait Posturejournal_title
Gait & postureauthors
Lin YC,Niu CC,Nikkhoo M,Lu ML,Chen WC,Fu CJ,Cheng CHdoi
10.1016/j.gaitpost.2018.06.021subject
Has Abstractpub_date
2018-07-01 00:00:00pages
159-164eissn
0966-6362issn
1879-2219pii
S0966-6362(18)30113-9journal_volume
64pub_type
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