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.
Neurodegeneration is the most common biological cause of dementia and often leads to Alzheimerâs disease. 1  Neurodegeneration is the process where brain cells (neurons) break down and die. These dying brain cells cause a permanent and progressive decrease in mental and physical function over time.