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首页> 外文期刊>Zoological Science >Brain control of mating behavior in the male cricket Gryllus bimaculatusDeGeer: Excitatory control of copulatory actions
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Brain control of mating behavior in the male cricket Gryllus bimaculatusDeGeer: Excitatory control of copulatory actions

机译：男性Gryllus bimaculatus DeGeer的交配行为的大脑控制：交配行为的兴奋性控制

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摘要

To understand the functional role of the insect brain in mating behavior, copulatory actions in response to a model stimulus were compared between intact and decerebrated male crickets. Decerebrated males were then tested to examine whether their copulatory actions were modified by biogenic amines or electrical stimulation. The main difference in copulatory actions between intact and decerebrated males was in the body thrusts consisting of the protraction and retraction of the abdomen for hooking. These movements became slower after the removal of the brain, as measured by the average interval between responses, called the cycle length. The cycle length increased to twice the length in intact males within about 20 min. Intraperitoneal injection of octopamine in decerebrated males shortened the cycle length dose-dependently (10(-6)-10(-2)M) and restored it nearly to the level in intact males at 10(-4)-10(-2)M. Octopamine-mimicking agents forskolin, IBMX and synephrine, and cyclic AMP analogue DB-cyclic AMP had effects similar to that of octopamine, while serotonin, dopamine, noradrenaline and adrenaline did not. Electrical stimulation of the neck connectives mimicked the effect of octopamine, which was blocked by octopamine antagonist phentolamine. Perfusion of the hemocoel with Ringer's solution to eliminate the octopamine previously injected abolished the effect of extrinsic octopamine, whereas it did not abolish the effect of electrical stimulation. These results suggest that the brain in the male cricket is involved in facilitating the activity of the pattern generator for mating behavior via intraganglionic octopamine.
机译：为了了解昆虫大脑在交配行为中的功能作用，比较了完整和无脑male的响应模型刺激的交配动作。然后对去无脑的雄性进行测试，以检查其交配作用是否被生物胺或电刺激改变。完好无损的男性和去脑的男性之间的交配动作的主要区别在于，身体的推力包括使腹部钩住而伸出和缩回。这些运动在大脑移开后变得较慢，这通过响应之间的平均间隔（称为周期长度）来衡量。在大约20分钟内，完整雄性的周期长度增加到两倍。腹膜内注射去甲乙胺的去脑男性，剂量依赖性地缩短了周期长度（10（-6）-10（-2）M），并将其恢复到接近完整男性的水平（10（-4）-10（-2）） M.仿照章鱼碱的福司高林，IBMX和辛弗林以及环状AMP类似物DB环状AMP的作用与章鱼胺相似，而5-羟色胺，多巴胺，去甲肾上腺素和肾上腺素则没有。对颈部结缔组织的电刺激模仿了章鱼胺的作用，章鱼胺被章鱼胺拮抗剂苯妥拉明阻断。用林格氏液灌注血细胞消除先前注射的章鱼胺消除了外源性章鱼胺的作用，而没有消除电刺激的作用。这些结果表明，雄性cket中的大脑参与了通过神经节内章鱼胺促进模式产生器交配行为的活动。

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