时差N小时 耳石(上)（在线收听）

Ear rocks, also known as “otoliths,” are tiny pebbles of calcium carbonate in our inner ear that help keep us balanced. They’re located deep inside the inner ear in a small pouch called a utricle. When we move our heads, the tiny rocks move around and bump into nerve cells. These nerve cells send signals to our brain that tell it which way the head is oriented. It’s one way we know up from down. But problems with ear rocks can be a cause of chronic dizziness or vertigo. Occasionally the little pebbles fall out of the utricle and can get into another part of the inner ear canals. When this happens, the brain senses that we’re moving much more than we really are, resulting in sensations of unsteadiness or dizziness.

耳岩，也被称为“耳石”，是内耳中碳酸钙形成的晶体，它帮助我们保持平衡。它们位于内耳深处一个叫作“胞囊”的地方。当我们移动头部时，晶体也会四处移动并接触到神经细胞。这些神经细胞将信号发送到我们的大脑，告诉大脑头面向的方向。这是一种让我们知道上下的方式。但耳石有问题的话，它会导致慢性头晕或眩晕。有时候，小晶体会从“胞囊”中掉出来，并进入到内耳道中。当这种情况发生时，大脑感到我们移动的距离要比实际移动的距离多很多，这会造成不稳或头晕的感觉。