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.
Alzheimer's Disease Causes. While much progress has been made in Alzheimerâs disease (AD) research, the exact cause is unknown. Many scientists believe that a buildup of two abnormal structures in the brain play an important role. These structures are called amyloid plaques and neurofibrillary tangles.lzheimer's Disease Causes. While much progress has been made in Alzheimerâs disease (AD) research, the exact cause is unknown. Many scientists believe that a buildup of two abnormal structures in the brain play an important role. These structures are called amyloid plaques and neurofibrillary tangles.