I have a couple of issues with that statement:
#1: Baclofen is an exogenous substance. The brain does not produce or secrete it. What then are we referring to? GHB (that's my only guess). The brain does produce and secrete that. AFAIK, that's the only endogenous GABA B agonist we have, although I've never taken the time to even try to look it up.
Are we basing this on Ameisen's paper? One paper proposed by one guy that hasn't even been discussed about by anyone else? Does that even qualify as a hypothesis?
#2: I can think of quite a few neurotransmitters and hormones just off the top of my head...lemme see:
dopamine
seratonin
epinephrine
norepinephrine
oxytocin
insulin
human growth hormone
grhelin
leptin
neuropeptide Y
GHB
GABA
endorphins
enkaphalins
H1
prolactin
acetylcholine
vasopressin
...
...
Of this list, not a single freaking one of them is "secreted in a slow and steady stream, constantly throughout the day and night." Not one...EVER. They are all secreted, in varying amounts, in response to hundreds of different stimuli (actions we take, things we perceive, things we eat, when we don't eat, sexual arousal, normal basal secretions (which rise and fall during the day and night depending on the substance), and on...and on. So why then, are we saying this?
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