gray matter

A nervous system structure composed primarily of nerve cell bodies (somas). May also include dendrites and the initial unmyelinated portion of axons. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the gray matter is

A nervous system structure composed primarily of nerve cell bodies (somas). May also include dendrites and the initial unmyelinated portion of axons. The atlas records it as a nerve at the organ scale in the human body.

Where the gray matter is

It sits within the nervous system. Only the system is known. The position shown carries almost no spatial information.

What the gray matter connects to

The atlas records 15 typed relationships for it, across 4 kinds of connection. part of central nervous system and lamina of septum pellucidum.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the gray matter. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as gray matter, gray matter of neuraxis, grey matter, grey matter of neuraxis, grey substance and neuronal grey matter, and 3 more. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002020, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: central nervous system and lamina of septum pellucidum.
• A kind of: central nervous system cell part cluster.
• subtype: basal ganglion, central gray substance, gray matter of forebrain, gray matter of hindbrain, gray matter of midbrain and gray matter of spinal cord, and 4 more.
• composed of: central nervous system gray matter layer and neural nucleus.

Questions

Where is the gray matter?

It sits within the nervous system. Only the system is known. The position shown carries almost no spatial information.

What does the gray matter connect to?

Part of: central nervous system and lamina of septum pellucidum.

Is the gray matter the same in other species?

Leumas holds the same relationship vocabulary for every species it carries, so where another dataset records this structure you can put the two side by side on /compare.