作为老鼠处理食物的手协调是围绕内在结构-功能关系组织的
John M Barrett1, Megan E Martin2, Mang Gao2
1Department of Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, 60611 john.barrett@cantab.net.
概括
动物的下巴和手部运动灵活地协调进食,在不结合的和紧密协调的咬咬之间切换. 这项研究揭示了多肢协调中的复杂行为神经生物学.
科学领域:
- 神经科学是一个神经科学.
- 生物力学 生物力学
- 动物行为 动物行为
背景情况:
- 动物的下巴和手具有双重功能,分别是咬/和抓住/操纵食物.
- 在动物中,口腔和手动行动之间的协调机制在很大程度上仍未被探索.
研究的目的:
- 为了研究小鼠在处理食物时,按摩器肌肉活动 (下) 和手部运动之间的协调.
- 阐明神经控制策略的基础复杂,目标导向的行为涉及多个身体部位.
主要方法:
- 结合了masseter肌肉活动的电生理记录与小鼠手部运动的千赫兹运动跟踪.
- 在各种食品处理任务中分析肌肉活动模式和手动力学.
主要成果:
- 按摩者活动表现出与手动同步的两种不同的模式:握住/ (节奏,~5 Hz) 和口腔/吞 (无周期性咬伤以手重新抓住).
- 和手的动作在握住/时是分离的,在摄入时是紧密协调的 (回咬序列~200毫秒).
- 鉴定出了一种与masseter相关的新型作用,牙利 (~13 Hz),伴随着眼睛亡.
结论:
- 动物的食物处理被组织成不同的,分层控制的模式,展示了下巴和手动的灵活协调.
- 这些发现提供了对多个身体部分协调和自然灵巧的行为神经生物学的见解.
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