螳螂蝦擁有極為複雜的視覺系統並且是目前已知動物中擁有最多種感光細胞的生物。一般而言，甲殼類生物的感光細胞皆擁有平行排列的微絨毛用以感測環境中的線性偏振光。然而，螳螂蝦的視覺系統不但具有精密的線性偏振光感測能力，而且還擁有以多達12種感色細胞平行處理波長訊號的彩色視覺以及所有動物當中獨一無二的環形偏振光視覺。為了瞭解螳螂蝦的神經系統如何處理如此多樣又複雜的視覺訊號，本研究利用玻璃微電極記錄螳螂蝦(Haptosquilla pulchella)神經纖維網(optic neuropils)內的神經細胞對於不同光刺激的反應。
本研究共記錄到89顆中間神經元細胞並且記錄其細胞對光脈衝、線性及環型偏振光的反應。依其反應模式共分成5大類共10種神經細胞類別，其中產生類比訊號的細胞包括4種第一層神經纖維網中的單極細胞(lamina monopolar cells)、1種正切狀細胞(tangential cells)以及1種首次在動物界中發現針對環型偏振光反應的神經細胞。除此之外。產生數位訊號的細胞包含3種第二層神經纖維網中產生脈衝式反應的細胞(medullary dimming and sustaining cells)和1種僅對光刺激起訖點產生時向性反應(phasic response)的細胞。本篇研究成果提供對螳螂蝦初階視覺訊號處理的初步認識，而關於其完整視覺系統包括彩色及偏振視覺的訊號處理模式則有待未來更深入的研究。

Stomatopod crustaceans, also known as mantis shrimps, has one of the most sophisticated visual system of any animal known. A functional specialized region termed midband which is composed of up to 6 rows of ommatidia and divides the eyes into two hemispheres was found in most of the mantis shrimps. Equipped with the midband, their compound eye is able to detect a diverse of visual information including 12 spectral channels, 4 circular polarization channels and 4 linear polarization channels. With such complex inputs, it has been proposed that stomatopods may require a distinctive visual processing mechanism to decode the information. By performing in vivo intracellular recording method with sharp-glass electrodes on neuropils of Haptosquilla pulchella, I have examined electrophysiological responses of 89 interneurons to light pulse as well as linearly and circularly polarized light. Satisfactory results were classified into 5 major functional groups which contained 3 groups of interneurons producing graded response, including lamina monopolar cells (LMCs), tangential neurons, as well as a new category of circular polarization analysis cell that has never been found in other animals, and 2 groups of interneurons that were spiking neurons and phasic neurons which exhibited digital responses. Though more works are required to fully decipher their visual physiology, results in this study provide an initial insight into how visual signals are transmitted and processed in stomatopod crustaceans.

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