The role of ocelli in cockroach optomotor performance.

The role of ocelli in cockroach optomotor performance.
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DOI:
10.1007/s00359-017-1235-z
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发表时间:
2018-03
期刊:
Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology
影响因子:
--
通讯作者:
Weckström M
Weckström M
中科院分区:
其他
文献类型:
--
作者:
Honkanen A;Saari P;Takalo J;Heimonen K;Weckström M

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昆虫单眼是相对简单的眼睛,被分配了与图像视觉无关的各种功能。在某些物种中,它们充当环境光强度的传感器,信息从该传感器传递到神经系统的各个部分,例如,来控制昼夜节律。在这项工作中,我们已经调查的可能性,单眼光刺激改变的特性的optomotor性能的美洲大蠊。我们使用了一个虚拟现实环境,其中一个全景运动图像呈现给蟑螂,而它的运动记录与轨迹球。之前我们已经证明,蟑螂的视动反应持续到无月夜空的强度,相当于每个复眼感光器吸收不到0.1光子/秒。通过封闭复眼,单眼,或两者,我们表明,单眼刺激可以改变强度依赖性的视动反应,表明单眼视觉系统参与运动的信息处理。我们还测量了表皮传输,虽然相对较大,是不太可能深刻的单眼功能,但可能是显着的,在确定完全失明的蟑螂的平均活动水平。
Insect ocelli are relatively simple eyes that have been assigned various functions not related to pictorial vision. In some species they function as sensors of ambient light intensity, from which information is relayed to various parts of the nervous system, e.g., for the control of circadian rhythms. In this work we have investigated the possibility that the ocellar light stimulation changes the properties of the optomotor performance of the cockroach Periplaneta americana. We used a virtual reality environment where a panoramic moving image is presented to the cockroach while its movements are recorded with a trackball. Previously we have shown that the optomotor reaction of the cockroach persists down to the intensity of moonless night sky, equivalent to less than 0.1 photons/s being absorbed by each compound eye photoreceptor. By occluding the compound eyes, the ocelli, or both, we show that the ocellar stimulation can change the intensity dependence of the optomotor reaction, indicating involvement of the ocellar visual system in the information processing of movement. We also measured the cuticular transmission, which, although relatively large, is unlikely to contribute profoundly to ocellar function, but may be significant in determining the mean activity level of completely blinded cockroaches.
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