The Head includes the Crown – Keter – and the Mental Powers within it.
The Head is always the beginning of the entire government of the Partzuf, and is only complete with the Crown (Keter) and the Mental Powers (מוחין, mochin) within it – that is, through the mystery of the indwelling of the one above it, which rests upon it. Included in the Head are the three Mental Powers of the Partzuf, because that is where the whole birth of the governmental order of the Partzuf in essence takes place.
We now come to a detailed explanation of the form of the Partzufim, starting with a general rule.