The relation between STAI anxiety score and chewing movement

• Published in: Japanese Journal of Psychosomatic Dentistry Vol. 8; no. 1; pp. 26 - 31
• Main Authors: Maruyama, Takao, Omae, Taizo, Ito, Hiroko, Nakaminami, Tadashi
• Format: Journal Article
• Language: English; Japanese
• Published: Japanese Society of Psychosomatic Dentistry 1993; 日本歯科心身医学会
• Subjects: anxiety; chewing movement; stomatognathic dysfunction; 不安; 咀嚼運動; 顎口腔機能異常
• ISSN: 0913-6681; 2186-4128
• DOI: 10.11268/jjpsd1986.8.26

This study investigated various kinds of parameters concerning chewing movement in relation to psychosomatic factors such as anxiety. Fifty Subjects (male: 46 female: 4, Average: 26.4 years old), studying in Osaka University, free of stomatognathic dysfunction signs participated in this study. At first, they answered a State-Trait Anxiety Inventory Form X questionnaire (STAI), and their chewing movements were recorded by a Sirognathograph Analysing System III. Then, the scale of State or Trait Anxiety was correlated with parameters of chewing movement ; rhythm, occluding points, shape of chewing pathway andmaximum speed were investigated. The results were as follows; 1) There was a positive correlations between the scale of the State Anxiety and the occluding phase period and a negative correlation with the maximal jaw opening. 2) Concerning the scale of Trait Anxiety there was a negative correlation with the amount of maximal jaw opening, and also a negative correlation with maximum jaw opening and closing speed. It was suggested that psychosomatic factors such as anxiety participate in chewing movement.