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.
Two neurotransmitters seem to play a role in Alzheimer's Disease: acetylcholine and glutamate. Acetylcholine (ACh) activates muscles and helps with arousal, short-term memory, and learning. Individuals with AD have low levels of ACh.
Causes Of Alzheimer's Disease Continued. When compared to the brains of people who are aging normally, the brains of people who have AD contain large numbers of plaques, particularly in the hippocampus, the region of the brain that controls memory.