Event-related Desynchronization of Mu Rhythms During Concentric and Eccentric Contractions. Issue 4 (4th July 2018)

• Record Type: Journal Article
• Authors: Park, Joo-Hee; Cynn, Heon-Seock; Cha, Kwang Su; Kim, Kyung Hwan; Jeon, Hye-Seon
• Is Part Of: Journal of motor behavior. Volume 50:Issue 4(2018)
• Page Start: 457
• Page End: 466
• Publication Date: 2018-07-04
• Subjects: concentric contraction -- eccentric contraction -- electroencephalography -- event-related desynchronization -- practice; Human mechanics -- Periodicals; Movement, Psychology of -- Periodicals; Motor Activity -- Periodicals; Motor Skills -- Periodicals; Bewegingsleer; Mécanique humaine -- Périodiques; Psychomotricité -- Périodiques; 612.705
• DOI: 10.1080/00222895.2017.1367638
• Languages: English
• ISSNs: 0022-2895

Abstract

ABSTRACT: The purpose of this study was to compare the electroencephalographic (EEG) patterns and reaction times (RTs) of muscle activation between concentric and eccentric biceps brachii contractions under the RT paradigm and to evaluate how the EEG patterns and RTs changed with practice. Sixteen subjects performed 3 sets of 30 repetitions of submaximal voluntary concentric and eccentric biceps contractions. RT, event-related desynchronization (ERD) patterns of mu rhythm onset, and ERD amplitudes were selectively analyzed. Mental demand decreased as familiarity with the motor action increased due to practice regardless of contraction type. However, the 2 types of muscle contractions still have differences in brain activity regardless of decreased mental demand: eccentric contractions require earlier preparation than concentric contractions.