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KMID : 0363620220430020061
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Journal of Korean Oriental Medicine
2022 Volume.43 No. 2 p.61 ~ p.74
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Effect of Bi-/Unilateral Masticatory Training on Memory and Concentration - Assessor-blind, Cross-over, Randomized Controlled Clinical Trial
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Bae Jun-Hyeong
Kim Hyung-Suk
Kang Do-Young
Kim Hye-Ji
Kim Jong-Yeon
Kim Koh-Woon
Cho Jae-Heung
Song Mi-Yeon
Chung Won-Seok
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Abstract
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Objectives: This study aimed to explore the short-term effects of bilateral masticatory training using an intraoral device on memory and concentration, which is an advanced form of Gochi, compared to the unilateral form with gum.
Methods: Thirty young healthy participants (age, 16?30 years) were screened and randomly assigned to one of two sequences in a crossover design. The participants assigned to sequence A (n=15) performed bilateral mastication using an intraoral device with a total of 300 taps, followed by unilateral mastication using gum with the same number of repetitions and frequency, separated by a 7-day washout period. A reverse order was used for sequence B. The primary and secondary outcomes were the digit span test result and the symbol digit modality test and the word list recallresults,respectively, which were conducted before and after each intervention.
Results: Symbol digit modality test scores increased by 12.03±8.33 with bilateral mastication, which was significantly higher than that obtained with chewing gum (5.17 points;95% confidence interval: 0.99, 9.34; p<0.05). Changes in the digit span test and word list recall scores were not significantly different between the two groups. In the digit span test forward, symbol digit modality test, and word list recall test, bilateral mastication was not inferior to unilateral mastication in improving memory and concentration.
Conclusions: Bilateral masticatory exercises using an intraoral device are not inferior to unilateral mastication with gum for improving memory in healthy young individuals. Further research is needed to determine the efficacy of bilateral masticatory training on cognitive function.
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KEYWORD
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Memory, Concentration, Traditional korean medicine, Bilateral mastication, Chewing exercise, Gochi
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