We have the adjective "facial" for the noun "face", and I am wondering what the counterpart for the noun "head" is. I could not find it on Google, and ChatGPT told me "cranial" which seems a bit different from what I expected.
Thank @Stuart F for the comment! My original thought was to make a joke on myself who can have some kind of "head expressions" (corresponding to "facial expressions") because I am a bit bald.
And I am also happy to see that the vocabulary can be different in different contexts!