The average age for cataract surgery is approximately 73 to 75 years old. But cataracts can occur in the 30s, 40s, and 50s. Of course the older the patient gets the more common the cataracts. But again, the presence of a cataract is not significant in itself.
Neurotransmitters Affected by Caffeine. Adenosine: Adenosine is the main neurotransmitter affected by caffeine and this is the mechanism through which all the other effects occur. Adenosine is a substance (a âpurine nucleoside) that is produced in the brain as our neurons fire.lutamate is one such âexcitatoryâ neurotransmitter which has an important role in âlong-term potentiationâ. What this means, is that glutamate increases the strength of the connection between neurons that fire at the same time.
Neurotransmitters can excite or inhibit neurons (nerve cells). Some common neurotransmitters are acetylcholine, norepinephrine, dopamine, serotonin and gamma aminobutyric acid (GABA). Acetylcholine and norepinephrine are excitatory neurotransmitters while dopamine, serotonin, and GABA are inhibitory.