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视网神奇:保护鱼大脑免受运动产生的血压脉冲

M A Lillie¹, A W Vogl², S G Gerard¹

¹Department of Zoology, University of British Columbia, Vancouver, BC, Canada.

Science (New York, N.Y.)

|September 22, 2022

概括

鱼拥有巨大的血管网络, 称为神经网, 这些网络减少危险的压力差异, 保护鱼的大脑.

科学领域:

海洋生物学
比较生理学
生物力学

背景情况:

鱼具有广泛的血管 (神经网膜),其功能尚不清楚.
类动物的大脑血液流通过这些视网膜.
鱼的运动会产生显著的脉动性血压.

研究的目的:

为了研究鱼的视网神奇的功能.
测试神经网膜保护鱼大脑免受运动引起的脉动性血压的假设.
确定脉冲传输机制是否能最大限度地减少大脑动脉-静脉压力差异.

主要方法:

一个基于鱼形态的计算模型被开发出来.
分析了11种鱼的形态数据.
该模型模拟了通过视网膜的血流和压力动态.

主要成果:

这项研究发现,视网膜中的大动脉容量与低头骨和脊椎通道容量相结合,显著降低了脉动性.
它可以保护大脑血管从97%的系统脉动.
确定了一种脉冲传输机制,可以最大限度地减少压力差异而不会减轻脉冲.

结论:

视网神器作为鱼的运动诱导血管脉动的保护机制.
网状复合体的演变可能与背中的发展有关.
鱼在移动过程中表现出一种独特的解决方案.

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