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首页> 外文期刊>American Zoologist >The evolution of feeding motor patterns in lizards: Modulatory complexity and possible constraints
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The evolution of feeding motor patterns in lizards: Modulatory complexity and possible constraints

机译：蜥蜴进给运动模式的演变：调制复杂性和可能的​​限制

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SYNOPSIS. Previous research indicated that the evolution of feeding motor patterns across major taxonomic groups might have occurred without large modifications of the control of the jaw and hyolingual muscles. However, the proposal of this evolutionary scheme was hampered by the lack of data for some key taxa such as lizards. Recent data on jaw and hyolingual feeding motor patterns of a number of lizard families suggest extensive variability within and among species. Although most lizards respond to changes in the structural properties of food items by modulating the activation of the jaw and hyolingual muscles, some food specialists might have lost this ability. Whereas the overall similarity in motor patterns across different lineages of lizards is large for the hyolingual muscles, jaw muscle activation patterns seem to be more flexible. Nevertheless, all data suggest that both the jaw and hyolingual system are complexly integrated. The elimination of feedback pathways from the hyolingual system through nerve transection experiments clearly shows that feeding cycles are largely shaped by feedback interactions. Yet, novel motor patterns including unilateral control seem to have emerged in the evolution from lizards to snakes.
机译：概要。先前的研究表明，在不对下颌和舌侧肌肉的控制进行较大改动的情况下，主要分类组中进食运动方式的演变可能已经发生。但是，由于缺少一些重要分类单元（如蜥蜴）的数据，因此无法采用此进化方案。有关许多蜥蜴科的颚和舌状进食运动模式的最新数据表明，物种内部和物种之间存在广泛的变异性。尽管大多数蜥蜴通过调节颌骨和舌侧肌肉的激活来响应食品结构特性的变化，但某些食品专家可能已经失去了这种能力。尽管对于舌侧肌肉来说，蜥蜴不同血统的运动模式总体相似度很大，但下颌肌肉的激活模式似乎更为灵活。尽管如此，所有数据都表明下颌和舌侧系统都复杂地集成在一起。通过神经横断实验消除了舌管系统的反馈途径，这清楚地表明，进食周期很大程度上受反馈相互作用的影响。然而，从蜥蜴到蛇的进化似乎已经出现了包括单方面控制在内的新型运动模式。

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