Zamanlu Masumeh, Khamnei Saeed, Salarilak Shaker, Oskoee Siavash Savadi, Shakouri Seyed Kazem, Houshyar Yousef, Salekzamani Yaghoub
Research Center of Physical Medicine and Rehabilitation, Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran, and Department of Epidemiology and Biostatistics, Faculty of Medicine, Urmia University of Medical Sciences Urmia, Iran.
Int J Clin Exp Med. 2012;5(4):326-31. Epub 2012 Aug 22.
Preferred chewing side is a still controversial matter and various methods used have yielded some inconsistencies. The aim of this study is to compare the preference determined in different conditions. Nineteen healthy subjects were offered hard (walnut) and soft (cake) foods, while the electromyography was recorded from their masseter muscles, in 2009 in the Research Center of Physical Medicine and Rehabilitation, Tabriz University of Medical Sciences, Tabriz, Iran. Four occurrences were determined as the side of the first chews/all chews in the two food types, and then analyzed for correlations and agreements. For hard food 73.68% and for soft food 57.89% of the subjects showed preference. The comparison of all chews showed a highly significant preference towards the right side in both food types (p=0.000 & 0.003). There was both correlation and agreement between the first chew preferences in both food types, and an agreement between the first and all chew preferences in the hard food. Therefore, there seems to exist some laterality in mastication, which is more explicit when using hard food and assessing all chews.
偏爱的咀嚼侧仍然是一个有争议的问题，所采用的各种方法也产生了一些不一致的结果。本研究的目的是比较在不同条件下确定的偏好。2009年，在伊朗大不里士医科大学大不里士物理医学与康复研究中心，对19名健康受试者提供了硬（核桃）、软（蛋糕）两种食物，并记录了他们咬肌的肌电图。确定了在两种食物类型中首次咀嚼/所有咀嚼的侧别出现的4次情况，然后对其进行相关性和一致性分析。对于硬食物，73.68%的受试者表现出偏好；对于软食物，57.89%的受试者表现出偏好。对所有咀嚼的比较显示，在两种食物类型中，受试者都高度偏向右侧咀嚼（p=0.000和0.003）。两种食物类型中首次咀嚼的偏好之间存在相关性和一致性，硬食物中首次咀嚼和所有咀嚼的偏好之间也存在一致性。因此，咀嚼似乎存在某种偏侧性，在食用硬食物并评估所有咀嚼时这种偏侧性更为明显。
