Grey commissure

{{Short description|Grey matter strip around the spinal cord}}

{{Infobox brain

| Name = Grey commissure

| Latin = commissura grisea anterior medullae spinalis, commissura grisea posterior medullae spinalis

| Image = Medulla spinalis - Substantia grisea - English.svg

| Caption = Medulla spinalis - Substantia grisea

| Image2 = AlbaAnteriorMedullaeSpinalis.png

| Caption2 = Spinal cord. (Grey commissure is #3, near center.)

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}}

The grey commissure is a thin strip of grey matter that surrounds the central canal of the spinal cord and, along with the anterior white commissure, connects the two halves of the cord. It comprises lamina X in the Rexed classification.