Abstract：
:Previous research exploring a lateral stepping gait utilized amount of variability (i.e. coefficient of variation) in the medial-lateral (ML) and anterior-posterior (AP) direction to propose that the central nervous system's active control over gait in any direction is dependent on the direction of progression. This study sought to further explore this notion through the study of the temporal structure of variability which is reflective of the neuromuscular system's organization of the movement over time. The largest Lyapunov exponent (LyE) of the reconstructed attractors for the foot's movement in the AP and ML was calculated. Results revealed that despite the obvious mechanical differences between a lateral stepping gait and typical forward walking, the central nervous system's organization of the movement of the feet is similar in the primary planes of progression, as well as the secondary planes of progression, despite being different anatomical planes during the locomotive tasks. In addition, consistent with previous studies exploring amount of variability, the secondary plane for both locomotive tasks proved to have larger LyE values than the primary plane of progression (F1,9=35.086, p<0.001). This is consistent with less dependency from stride-to-stride in the secondary plane implying increased active control.
journal_name
Gait Posturejournal_title
Gait & postureauthors
Wurdeman SR,Stergiou Ndoi
10.1016/j.gaitpost.2012.10.017subject
Has Abstractpub_date
2013-05-01 00:00:00pages
73-8issue
1eissn
0966-6362issn
1879-2219pii
S0966-6362(12)00390-6journal_volume
38pub_type
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