Abstract of 9th International Congress of Neuroethology
巻, 号, ページ
page 460
出版年月
2010年8月
出版者
和文:
英文:
会議名称
和文:
英文:
9th International Congress of Neuroethology
開催地
和文:
英文:
Salamanca, Spain
アブストラクト
Insects perform adaptive behavior according to changing environmental conditions using their small brains. Here we define adaptability as an ability to execute a task in different environmental conditions. This adaptability is generated through the relationship among brain, body and environment, so it is necessary to examine how a brain process changing environmental information during behavior. To understand neural processing in adaptive behavior, we constructed a brain-machine hybrid system using motor signals related to the steering behavior of the male silkworm moth for controlling a mobile robot. Using the hybrid system we can intervene with the relationship of brain and environment by arbitrarily changing parameters of a robot movement.
We developed this hybrid system according to the following steps. (1) For electrophysiological multi-unit recordings on a robot, we developed small amplifiers. (2) We selected units that activated during neck swinging induced by optic flow and pheromone stimuli as steering information. (3) To control a robot by neural activities, we implemented a spike-behavior conversion rule such that frequency of the left and right neck motor neurons’ spikes was linearly converted into rotation of the wheels.
We reproduced the moth’s programmed behavioral pattern and orientation behavior toward a pheromone source on the hybrid system. We compared the orientation behavior of moths with that of the hybrid system under different pheromone conditions. From these experiments, we could say that we could reconstruct silkworm moth behavior on the hybrid system.
Moreover, using the hybrid system, we examined adaptability of the silkworm moth. At first, we examined whether moths responded to change of movement programmed to the hybrid system. We observed compensation motor signals in response to the externally given movement change, and this compensation was mainly caused by the sensory feedback through compound eyes. Then we examined how moths responded to change of spike-behavior conversion rules (ex. left or right biased motor gain, increase or decrease of motor gain) during odor searching behavior by recording motor signals on the hybrid system.
各種検索
サポート
ヘルプ