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.
Stimulants comprise a large group of substances that include everything from the caffeine in coffee to illegal drugs such as crack cocaine and Amphetamines. Stimulants increase the amount of neurotransmitters in the brain. Neurotransmitters are the chemical messages that nerve cells send to each other to create sensations in the body. Dopamine is the neurotransmitter that is the most sensitive to the action of Stimulants. Dopamine is similar to adrenaline and affects brain processes that control movement, emotional response, and the ability to experience pleasure and pain.