Hi there.
I have noticed a certain contradiction between the way to practice anga-nyasa and Karanyasa,first,from the Mahanirvana Tantra and from popular common hindu knowledge.
Everybody seems to when attributing the mantras on the upper body(heart,head,ayes...) they pronounce the name of the place and the mantra attributed,for the heart for instance : Om Hridayaya Namah and so on,the same when focusing on the fingers.

But the way described in the Mahanirvana Tantra is differnent is simply states that each word of the mantra Om,Sat,Chit,Ekam,Brahma should be followed by Namah,Svaha,Vashat,Hung,Vaushat.(Chapter 3.from 39 to 42)

I would like to clear this confusion please.