Ethmoidal spine

{{Infobox bone

| Name = Ethmoidal spine

| Latin =

| Image = Gray145.png

| Caption = Sphenoid bone. Upper surface. (Ethmoidal spine visible at top.)

| Image2 =

| Caption2 =

}}

The superior surface of the body of the sphenoid bone (Fig. 145) presents in front a prominent spine, the ethmoidal spine, for articulation with the cribriform plate of the ethmoid; behind this is a smooth surface slightly raised in the middle line, and grooved on either side for the olfactory lobes of the brain.