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.
MDMA affects the brain by increasing the activity of at least three neurotransmitters (the chemical messengers of brain cells): serotonin, dopamine, and norepinephrine. Like other amphetamines, MDMA causes these neurotransmitters to be released from their storage sites in neurons, resulting in increased neurotransmitter activity.