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首页> 外文期刊>Journal of Neurophysiology >Infrared detection without specialized infrared receptors in the bloodsucking bug Rhodnius prolixus
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Infrared detection without specialized infrared receptors in the bloodsucking bug Rhodnius prolixus

机译：吸血虫Rhodnius prolixus中没有专门的红外受体的红外检测

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Bloodsucking bugs use infrared radiation (IR) for locating warm-blooded hosts and are able to differentiate between infrared and temperature (T) stimuli. This paper is concerned with the neuronal coding of IR in the bug Rhodnius prolixus. Data obtained are from the warm cells in the peg-in-pit sensilla (PSw cells) and in the tapered hairs (THw cells). Both warm cells responded to oscillating changes in air T and IR with oscillations in their discharge rates. The PSw cells produced stronger responses to T oscillations than the THw cells. Oscillations in IR did the reverse: they stimulated the latter more strongly than the former. The reversal in the relative excitability of the two warm cell types provides a criterion to distinguish between changes in T and IR. The existence of strongly responsive warm cells for one or the other stimulus in a paired comparison is the distinguishing feature of a “combinatory coding” mechanism. This mechanism enables the information provided by the difference or the ratio between the response magnitudes of both cell types to be utilized by the nervous system in the neural code for T and IR. These two coding parameters remained constant, although response strength changed when the oscillation period was altered. To discriminate between changes in T and IR, two things are important: which sensory cell responded to either stimulus and how strong was the response. The label warm or infrared cell may indicate its classification, but the functions are only given in the context of activity produced in parallel sensory cells.
机译：吸血虫利用红外线（IR）定位温血宿主，并能够区分红外线和温度（T）刺激。这篇论文与臭虫Rhodnius prolixus中IR的神经元编码有关。所获得的数据来自穴位感应器（PSw细胞）和锥形头发（THw细胞）中的温暖细胞。两个温暖的小室都响应其空气T和IR的振荡变化，其放电速率也随之振荡。 PSw细胞比Tw细胞对T振荡产生更强的响应。 IR的振荡则相反：它们对前者的刺激更大。两种温暖细胞类型的相对兴奋性的逆转提供了区分T和IR变化的标准。配对比较中对一个或另一个刺激具有强烈响应的温暖细胞的存在是“组合编码”机制的显着特征。这种机制使得神经系统可以在T和IR的神经代码中利用两种细胞类型的反应幅度之差或比率所提供的信息。尽管当改变振荡周期时响应强度改变，但是这两个编码参数保持恒定。要区分T和IR的变化，有两点很重要：哪个感觉细胞对任一刺激都做出了反应以及反应的强度。标签温暖或红外线的细胞可能表明其分类，但功能仅在平行感觉细胞产生的活动的背景下给出。

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