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Central canal of spinal cord

Canalis centralis medullae spinalis · Centrální kanálek míchy

Nervous system

Looks like

A tiny channel running down the centre of the spinal cord, continuous with the fourth ventricle.

What it does

A leftover of the embryonic neural tube; contains cerebrospinal fluid.

Keeping it well

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

Related conditions