Yamada Y, Haraguchi N, Uchida K, Meng Y
Department of Oral Physiology, Nagasaki University School of Dentistry, Japan.
Physiol Behav. 1993 Feb;53(2):301-7. doi: 10.1016/0031-9384(93)90208-w.
Jaw movements and masticatory muscle activity were recorded in freely moving rabbits during limb-licking, chewing, and drinking. The limb-licking movement was characterized by rhythmical jaw movement and digastric burst and relatively small masseter activity. The mean cycle time was 292 ms +/- 11.0 (mean +/- SE: n = 7) and was longer than that in chewing (267 ms +/- 20.8, p < 0.01) or drinking (208 ms +/- 15.2, p < 0.01). Jaw movements in the frontal plane of the ingestive behaviors coincided with those reported in previous studies; however, that of the licking movements was featured here. The basic cycle included; a) an opening stroke in which the mandible moved downward and laterally, b) a lateral excursion stroke in which the mandible moved medially and either upward or downward, and c) a closing stroke in which the mandible moved upward to the closing position. During opening, the digastric activity on the working side was determined to be larger than that on the other side (p < 0.001).
在自由活动的兔子进行舔肢、咀嚼和饮水时，记录其下颌运动和咀嚼肌活动。舔肢运动的特点是有节奏的下颌运动和二腹肌爆发，咬肌活动相对较小。平均周期时间为292毫秒±11.0（平均值±标准误：n = 7），比咀嚼（267毫秒±20.8，p < 0.01）或饮水（208毫秒±15.2，p < 0.01）时的周期时间长。摄食行为在额平面的下颌运动与先前研究报道的一致；然而，此处重点描述了舔的运动。基本周期包括：a）下颌向下和向外侧移动的开口冲程，b）下颌向内侧移动并向上或向下移动的侧方偏移冲程，以及c）下颌向上移动至闭合位置的闭合冲程。在开口期间，工作侧的二腹肌活动被确定大于另一侧（p < 0.001）。
