Neural activity in the central complex of the cockroach brain is linked to turning behaviors
Neural activity in the central complex of the cockroach brain is linked to turning behaviors
复制标题
DOI：
10.1242/jeb.080473
复制
发表时间：
2013-03-01
影响因子：
2.8
通讯作者：
Ritzmann, Roy E.
中科院分区：
文献类型：
--
作者：
Guo, Peiyuan;Ritzmann, Roy E.
动物在复杂地形中移动时，必须考虑周围的感官线索，并相应地改变动作。在节肢动物脑中，中央复合体（CC）接收高度预处理的感觉信息，并将输出发送到运动前区，这表明它可能在定向运动的中枢控制中发挥作用。我们进行了四极录音内的CC在蟑螂走在一个空气悬浮的球，以检查的CC在转向行为的作用。当一根杆放在蟑螂的头部附近时，蟑螂在开始运动之前用一个或两个触角反复触摸杆。一些CC单位回应自我产生的触角接触的对象，但在较低的水平相比，外部施加的触角刺激。其他CC单位的神经活动对运动作出反应。我们发现，一些CC单位表现出离散的发射场对应于特定的运动状态。我们还发现，一些CC单位的射击率的变化之前，在一个方向上，但不是其他的转向速度的变化。此外，这种偏向单位位于大脑同侧，与它们可以预测的转弯速度方向相同。此外，CC的电刺激引起或修改的运动，和一些诱发运动的方向可以预测的运动预测单位附近的刺激部位的响应特性。因此，我们的研究结果表明，在人口水平上，不对称的活动在CC之前，并影响转向行为。
An animal moving through complex terrain must consider sensory cues around it and alter its movements accordingly. In the arthropod brain, the central complex (CC) receives highly preprocessed sensory information and sends outputs to premotor regions, suggesting that it may play a role in the central control of oriented locomotion. We performed tetrode recordings within the CC in cockroaches walking on an air-suspended ball to examine the role of the CC in turning behaviors. When a rod was placed near the cockroach's head, the cockroach touched the rod repeatedly with one or both antennae before locomotion was initiated. Some CC units responded to self-generated antennal contact with the object, but at lower levels compared with externally imposed antennal stimulation. The neural activity of other CC units responded to locomotion. We found that some CC units showed discrete firing fields corresponding to specific locomotion states. We also found that changes in firing rate of some CC units preceded changes in turning speed in one direction but not the other. Furthermore, such biased units were located in the side of the brain ipsilateral to the direction of the turning speed they could predict. Moreover, electrical stimulation of the CC elicited or modified locomotion, and the direction of some evoked locomotion could be predicted by the response property of locomotion-predictive units near the stimulation site. Therefore, our results suggest that, at the population level, asymmetrical activity in the CC precedes and influences turning behavior.