Bermejo R, Remy M, Zeigler H P
Biopsyhology Program, Hunter College, City University of New York, NY 10021.
J Comp Physiol A. 1992 Mar;170(3):303-9. doi: 10.1007/BF00191418.
Movements of the maxilla and mandible were recorded during drinking in the head-fixed pigeon and correlated with electromyographic activity in representative jaw muscle groups. During drinking, each jaw exhibits opening and closing movements along both the dorso-ventral and rostro-caudal axes which may be linked with or independent of each other. All subjects showed small but systematic increases in cycle duration over the course of individual drinking bouts. Cyclic jaw movements during drinking were correlated with nearly synchronous activity in the protractor (levator) of the upper jaw and in several jaw closer muscles, as well as with alternating activity in tongue protractor and retractor muscles. No EMG activity was ever recorded in the lower jaw opener muscle, suggesting that lower jaw opening in this preparation is produced, indirectly, by the contraction of other muscles. The results clarify the contribution of the individual jaws to the generation of gape variations during drinking in this species.
在头部固定的鸽子饮水过程中，记录了上颌骨和下颌骨的运动，并将其与代表性颌肌组的肌电图活动相关联。饮水时，每个颌骨沿背腹轴和前后轴都表现出开合运动，这两种运动可能相互关联或相互独立。所有受试对象在单次饮水过程中，周期持续时间都有小幅但系统性的增加。饮水时的周期性颌骨运动与上颌骨的前拉肌（提肌）和几块颌骨闭合肌中几乎同步的活动相关，也与舌前拉肌和后缩肌的交替活动相关。在下颌张开肌中从未记录到肌电图活动，这表明在此准备状态下，下颌张开是由其他肌肉的收缩间接产生的。这些结果阐明了该物种饮水过程中各个颌骨对张口变化产生的作用。
