Your 'Finnish researcher' is free to call them whatever he feels like, even them little fookers. Especially if he/she one of those genetics who will decide the relative capabilities of the 'manufacturing centres' in the brain. That is, how much (if at all) of these hormones, semi-hormones and neurotransmitters will be produced. I mean, to manage to put endocrine glands producing hormones (such as, say, the thyroid gland)  right into the brain, probably next to the pituitary! That seems sensible indeed, if they do belong to one endocrine system, they just have to be situated in one place - in the brain, where else! But such experiments probably don't work properly at first and that is why such unique chemical substances as semi-hormones appear which, as it clear from their name work only part-time as hormones and the rest of time are just fucking around.
:)