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Central canal

Canalis centralis · Centrální kanálek míchy

Nervous system

Looks like

A pinpoint channel down the very centre of the spinal cord, filled with cerebrospinal fluid.

What it does

Continues the fluid spaces of the brain down the cord; a leftover of the tube the nervous system grows from.

Keeping it well

It can widen into a fluid-filled cavity (syrinx), which slowly takes away pain and temperature sense in the arms; an MRI shows it.

Related conditions