Distinct sets of locomotor modules control the speed and modes of human locomotion

Although recent vertebrate studies have revealed that different spinal networks are recruited in locomotor mode- and speed-dependent manners, it is unknown whether humans share similar neural mechanisms. Here, we tested whether speed- and mode-dependence in the recruitment of human locomotor network...

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Bibliographic Details
Published in:Scientific reports 2016-11, Vol.6 (1), p.36275-36275, Article 36275
Main Authors: Yokoyama, Hikaru, Ogawa, Tetsuya, Kawashima, Noritaka, Shinya, Masahiro, Nakazawa, Kimitaka
Format: Article
Language:English
Subjects:
631/378/2632/2633
631/443/376
Adult
Animal behavior
Electromyography
Electromyography - methods
Gait - physiology
Humanities and Social Sciences
Humans
Locomotion
Locomotion - physiology
Male
multidisciplinary
Muscle, Skeletal - innervation
Muscle, Skeletal - physiology
Nerve Net - physiology
Running
Running - physiology
Science
Walking
Walking - physiology
Young Adult
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Summary:Although recent vertebrate studies have revealed that different spinal networks are recruited in locomotor mode- and speed-dependent manners, it is unknown whether humans share similar neural mechanisms. Here, we tested whether speed- and mode-dependence in the recruitment of human locomotor networks exists or not by statistically extracting locomotor networks. From electromyographic activity during walking and running over a wide speed range, locomotor modules generating basic patterns of muscle activities were extracted using non-negative matrix factorization. The results showed that the number of modules changed depending on the modes and speeds. Different combinations of modules were extracted during walking and running, and at different speeds even during the same locomotor mode. These results strongly suggest that, in humans, different spinal locomotor networks are recruited while walking and running, and even in the same locomotor mode different networks are probably recruited at different speeds.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep36275