Posted by:
Amyjo
(
)
Date: February 18, 2019 02:47PM
The nun I took dishes to this past week is in her 80's. She's doing fine mentally.
People where I worship live well into their 90's. One guy lived to be well over 100 not too long ago. Their faculties were pretty good all things considered for older folks.
But it's true that brain function does decline as we age notwithstanding.
"Common memory changes that are associated with normal aging include:
Difficulty learning something new: Committing new information to memory can take longer.
Multitasking: Slowed processing can make processing and planning parallel tasks more difficult.
Recalling names and numbers: Strategic memory that helps memory of names and numbers begins to decline at age 20.
Remembering appointments: Without cues to recall the information, appointments can be put safely in storage and then not accessed unless the memory is jogged.
While some studies show that one third of older people struggle with declarative memory (memories of facts or events that have been stored and can be retrieved), other studies indicate that one fifth of 70-year-olds perform cognitive tests just as well as their 20-year-old counterparts....
Scientists are currently piecing together sections of the giant puzzle of brain research to determine how the brain subtly alters over time to cause these changes.
General changes that are thought to occur during brain aging include:
Brain mass: Shrinkage in the frontal lobe and hippocampus - areas involved in higher cognitive function and encoding new memories - starting around the age of 60 or 70 years.
Cortical density: Thinning of the outer-ridged surface of the brain due to declining synaptic connections. Fewer connections may contribute to slower cognitive processing.
White matter: White matter consists of myelinated nerve fibers that are bundled into tracts and carry nerve signals between brains cells. Myelin is thought to shrink with age, and as a result, slow processing and reduce cognitive function.
Neurotransmitter systems: Researchers suggest that the brain generates less chemical messengers with aging, and it is this decrease in dopamine, acetylcholine, serotonin, and norepinephrine activity that may play a role in declining cognition and memory and increased depression...."
And then there are the "Super Agers!"
""SuperAgers" are a rare group of individuals over the age of 80 years who have memories as sharp as healthy people decades younger.
Research by Northwestern University Feinberg School of Medicine in Chicago, IL, compared SuperAgers with a control group of same-age individuals. They found that the brains of SuperAgers shrink at a slower rate than their age-matched peers, which results in a greater resistance to the typical memory loss observed with age, thus revealing that age-related cognitive decline is not inevitable.
"We found that SuperAgers are resistant to the normal rate of decline that we see in average elderly, and they're managing to strike a balance between life span and health span, really living well and enjoying their later years of life," says Emily Rogalski, associate professor at the Cognitive Neurology and Alzheimer's Disease Center (CNADC) at Northwestern University Feinberg School of Medicine.
By studying how SuperAgers are unique, the researchers hope to unearth biological factors that might contribute to maintaining memory ability in advanced age."
https://www.medicalnewstoday.com/articles/319185.php