I assume this is the same sort of thing that the Aunkai refers to as "hiji kara saki", given Akuzawa sensei's exposure to daito ryu?
I can't really explain what Akuzawa Sensei means by that term, other than translating it as "elbow on out.". All i know about the elbows is that they are always pulled downwards towards the ground and kept inwards. This along with the shoulders kind of being pulled down, seems to bypass activating the shoulders.
As I understand it, that came direct from Sagawa.