The narial musculature of Alligator mississippiensis : Can a muscle be its own antagonist?,Journal of Morphology

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The narial musculature of Alligator mississippiensis : Can a muscle be its own antagonist?
Journal of Morphology ( IF 1.5 ) Pub Date : 2020-04-11 , DOI: 10.1002/jmor.21124
Matthew Klassen ₁ , James Adams ₁ , Michael Cramberg ₁ , Lucas Knoche ₁ , Bruce A Young ₁

Affiliation

The crocodilian naris is regulated by smooth muscle. The morphology of this system was investigated using a combination of gross, light microscopic, and micro‐CT analyses, while the mechanics of narial regulation were examined using a combination of Hall Effect sensors, narial manometry, and electromyography. Alligator mississippiensis, like other crocodilians, routinely switches among multiple ventilatory mechanics and does not occlude the nares during any portion of the ventilatory cycle. In a complex that is unique among vertebrates, a single block of smooth muscle functions in dilation when active, and in constriction when passive. The alligator nares may include one of the best examples of a muscle that functions in “pushing” as well as “pulling.” The central muscle for narial regulation, the dilator naris, can legitimately be viewed as its own antagonist.

中文翻译：

密西西比鳄鱼的鼻部肌肉组织：肌肉可以是它自己的拮抗剂吗？

鳄鱼的鼻孔由平滑肌调节。使用大体、光学显微镜和显微 CT 分析的组合研究了该系统的形态，而使用霍尔效应传感器、鼻腔测压和肌电图的组合检查了鼻腔调节的机制。密西西比鳄鱼像其他鳄鱼一样，经常在多种通气机制之间切换，并且在通气周期的任何部分都不会阻塞鼻孔。在脊椎动物中独一无二的复合体中，单个平滑肌块在主动时扩张，被动时收缩。鳄鱼的鼻孔可能是肌肉在“推”和“拉”中发挥作用的最好例子之一。鼻孔调节的中枢肌肉，鼻孔扩张器，

更新日期：2020-04-11

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