Monteagudo José, Lindemann Jens P, Egelhaaf Martin
Department of Neurobiology & Cluster of Excellence Cognitive Interaction Technology (CITEC), Bielefeld University, 33615 Bielefeld, Germany
Department of Neurobiology & Cluster of Excellence Cognitive Interaction Technology (CITEC), Bielefeld University, 33615 Bielefeld, Germany.
J Exp Biol. 2017 Dec 15;220(Pt 24):4578-4582. doi: 10.1242/jeb.164129. Epub 2017 Nov 2.
During locomotion, animals employ visual and mechanical cues in order to establish the orientation of their head, which reflects the orientation of the visual coordinate system. However, in certain situations, contradictory cues may suggest different orientations relative to the environment. We recorded blowflies walking on a horizontal or tilted surface surrounded by visual cues suggesting a variety of orientations. We found that the different orientations relative to gravity of visual cues and walking surface were integrated, with the orientation of the surface being the major contributor to head orientation, while visual cues and gravity also play an important role. In contrast, visual cues did not affect body orientation much. Cue integration was modeled as the weighted sum of orientations suggested by the different cues. Our model suggests that in the case of lacking visual cues, more weight is given to gravity.
在移动过程中，动物利用视觉和机械线索来确定其头部的方向，而头部方向反映了视觉坐标系的方向。然而，在某些情况下，相互矛盾的线索可能会暗示相对于环境的不同方向。我们记录了在水平或倾斜表面上行走的家蝇，周围的视觉线索暗示了各种方向。我们发现，视觉线索和行走表面相对于重力的不同方向被整合在一起，其中表面的方向是头部方向的主要贡献因素，而视觉线索和重力也起着重要作用。相比之下，视觉线索对身体方向的影响不大。线索整合被建模为不同线索所暗示方向的加权和。我们的模型表明，在缺乏视觉线索的情况下，会给予重力更大的权重。
