Postural control and contingent negative variation during transient floor translation while standing with the ankle fixed

Bibliographic Data

ID24312756
AuthorsVitalii Lytnev, Katsuo Fujiwara, Naoe Kiyota, Mariko Irei, Hiroshi Toyama (0000-0002-5341-1693), Chie Yaguchi
Year2017
Volume36
Issue1
Pages7-7
Publication date2017-12-01
Open AccessYes
TypeARTICLE
VenueJournal of PHYSIOLOGICAL ANTHROPOLOGY (JOURNAL)
Journal identifiersISSN: 1880-6791 • E-ISSN: 1880-6805
PublisherSpringer Science and Business Media LLC (PUBLISHER)
DOI10.1186/s40101-016-0104-8
PMID27457224
OpenAlexW2497035858
LanguageEN
References cited41

BACKGROUND: Adaptation changes in postural muscle activity and anticipatory attention were investigated with the ankle joint fixed to change postural control strategies during transient floor translation. METHODS: For 15 healthy young adults, 40 transient floor translations (S2) in the anterior direction were applied 2 s after an auditory warning signal (S1), under conditions with or without fixation of the ankle. Activity of the frontal postural muscles (tibialis anterior (TA), rectus femoris (RF), rectus abdominis) and contingent negative variation (CNV, brain potential) were analyzed for 20 trials each of the early and latter halves under each fixation condition. RESULTS: With fixation, peak amplitude of muscle activity after S2 was significantly decreased in TA and increased in RF. These muscles showed marked adaptive decreases. The early component of CNV reduced with adaptation, particularly under fixation condition. Only in RF, background activity increased just before S2, with adaptation under fixation. A significant correlation was found between timings of CNV peak and RF activation just before S2 only after adaptation under fixation. CONCLUSION: These results suggest that the main activation muscle changes from TA to RF with fixation. Under such condition, attention would be focused on the knee with adaptation, and the need for heightening attention in the early stage may have declined. Correspondingly, the timing to heighten stiffness of the RF became later, and attention would have been paid to RF activation just before S2.

anticipatory attention · Contingent negative variation · postural control · rectus abdominis · rectus femoris · tibialis anterior · Balance, Gait, and Falls Prevention · Motor Control and Adaptation · Muscle activation and electromyography studies