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Grey Squirrel
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PET & SPECT scans of the brain can show it. I know. I had 2 family members and a friend scanned and diagnosed by it.
We can always rely on you to have friends and family members on the cutting edge of every possible situation in order for you to draw your expertise, however in 1984 the commercial PET scan was in it's developmental stages and it's widespread use was still several years away. In 1984 Alzheimer's testing was limited to ruling out Parkinson's and Dementia, brain imaging wasn't used..... even on the President. Ron Regan Jr. is using his 20/20 hindsight to sell a book, nothing more.
 

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PET & SPECT scans of the brain can show it. I know. I had 2 family members and a friend scanned and diagnosed by it.

"When available as a diagnostic tool, single photon emission computed tomography (SPECT) and positron emission tomography (PET) neuroimaging are used to confirm a diagnosis of Alzheimer's in conjunction with evaluations involving mental status examination.[97] In a person already having dementia, SPECT appears to be superior in differentiating Alzheimer's disease from other possible causes, compared with the usual attempts employing mental testing and medical history analysis.[98] Advances have led to the proposal of new diagnostic criteria.[5][81]

A new technique known as PiB PET has been developed for directly and clearly imaging beta-amyloid deposits in vivo using a tracer that binds selectively to the A-beta deposits.[99] The PiB-PET compound uses carbon-11 PET scanning. Recent studies suggest that PiB-PET is 86% accurate in predicting which people with mild cognitive impairment will develop Alzheimer's disease within two years, and 92% accurate in ruling out the likelihood of developing Alzheimer's.[100]

A similar PET scanning radiopharmaceutical compound called (E)-4-(2-(6-(2-(2-(2-([18F]-fluoroethoxy)ethoxy)ethoxy)pyridin-3-yl)vinyl)-N-methyl benzenamine, or 18F AV-45, or florbetapir-fluorine-18, or simply florbetapir, contains the longer-lasting radionuclide fluorine-18, has recently been created, and tested as a possible diagnostic tool in Alzheimer's patients.[101][102][103][104] Florbetapir, like PiB, binds to beta-amyloid, but due to its use of fluorine-18 has a half-life of 110 minutes, in contrast to PiB's radioactive half life of 20 minutes. Wong et al. found that the longer life allowed the tracer to accumulate significantly more in the brains of the AD patients, particularly in the regions known to be associated with beta-amyloid deposits.[104]

One review predicted that amyloid imaging is likely to be used in conjunction with other markers rather than as an alternative.[105]

Volumetric MRI can detect changes in the size of brain regions. Measuring those regions that atrophy during the progress of Alzheimer's disease is showing promise as a diagnostic indicator. It may prove less expensive than other imaging methods currently under study.[106]"
There are lots of things they can do to indirectly determine that Alzheimer's is a likely diagnosis. These tests were not available in the 80's, so they couldn't have been used on Reagan. But an ironclad diagnosis is still only obtained by autopsy.
From an Alzheimer's article:
"There is no singular test that can definitively diagnose Alzheimer's disease, although imaging technology designed to detect Alzheimer's plaques and tangles is rapidly becoming more powerful and precise. Still, a comprehensive, competent diagnostic workup by a skilled physician can pinpoint the cause of Alzheimer's-like symptoms with over 90% accuracy."

Link: http://alzheimers.about.com/od/diagnosisofalzheimers/a/diagnosis.htm

But this diagnosis can only be made after the disease has caused the development of noticeable symptoms. You would never run the tests you mentioned on people with no symptoms of Alzheimer's, such as Reagan in the mid-80's.
 

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Can't complain.just getting threw the start of the new year.Reading all the stuff on here about Reagan. Couldn't decide which pres' I liked least. I think Bush by a nose.
At least we agree that Ron Jr is a nitwit. :cheers:
 

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Here you go, Tsavo... (not that you will read it)

Reagan Son Claims Dad Had Alzheimer's as President

2011 is a big year for Ronald Reagan fans, being the centennial of his February 6 birth in Tampico, Ill. But youngest son Ron Reagan is spoiling the good cheer with a new book that suggests the Gipper suffered from Alzheimer's disease while in the White House, a claim dismissed by Reagan's doctors and outside experts. "Had the diagnosis been made in, say, 1987, would he have stepped down?" Ron asks, regarding the disease confirmed in 1994. "I believe he would have," he writes in My Father At 100: A Memoir, due in bookstores Tuesday. [Poll: Who do you think was the worst president?]

In addition to challenging the former president's doctors, Ron also reports for the first time that Reagan, right after falling off a horse six months out of the White House, underwent brain surgery, denied by Reagan associates.

Let's start with the Alzheimer's diagnosis. It was announced in 1994. While it prompted some to suggest they knew Reagan had the disease as president, his four White House doctors said they saw no evidence of it. But Ron, who became a liberal and atheist, disappointing his dad, suggests he saw hints of confusion and "an out-of-touch president" during the 1984 campaign and again in 1986, when his father couldn't recall the names of California canyons he was flying over. Arguing his case in the book, Ron adds that doctors today know that the disease can be in evidence before being recognized. "The question, then, of whether my father suffered from the beginning stages of Alzheimer's while in office more or less answers itself," he writes. [See a gallery of caricatures of Reagan and other pols.]

Besides playing amateur doctor, Ron Reagan reveals, if true, brain surgery on his dad never before reported. He accurately reports that Reagan, after leaving the presidency, was bucked from a horse on July 4, 1989, while in Mexico. Ron tells of how his dad, after initially refusing medical help, was transported to a San Diego hospital. "Surgeons opening his skull to relieve pressure on the brain emerged from the operating room with the news that they had detected what they took to be probable signs of Alzheimer's disease." Several Reagan associates, however, say there was no surgery in San Diego.

What's more there is no reporting about any San Diego operation on Reagan. News reports at the time of his fall say Reagan was flown to a hospital in Arizona, where he was treated for scrapes and bruises and released after five hours.

There were no reports of Reagan with a shaved head or skull stitches later that month when he served as a guest TV announcer at the July 11 baseball All-Star Game in Anaheim, Calif., or when he was inducted into the Cowboy Hall of Fame in Oklahoma City on July 21.

In September, he went to the Mayo Clinic, where a small burr hole was drilled to relieve a fluid buildup due to the fall.

Ron Reagan doesn't mention this, but says that Reagan visited the Mayo Clinic in 1990 for tests that "confirmed the initial suspicion of Alzheimer's." Reagan's post-presidency history, documented in several archives like University of Texas, reveal no such visit. And Dr. John E. Hutton Jr. his doctor from 1984 through Reagan's retirement, told the New York Times that Reagan didn't show the tell-tale symptoms until 1993.

Ron Reagan won't talk about his book until its release, says his publisher Viking. The publisher also didn't provide documents backing up the San Diego operation claim.

Here are key excerpts from Ron Reagan about his dad's situation from My Father At 100, A Memoir.

Early hints that Ronald Reagan's mind was fuzzy:

"Three years into his first term as president, though, I was feeling the first shivers of concern that something beyond mellowing was affecting my father. We had always argued over this issue or that, rarely with anything approaching belligerence, but vigorously all the same. He generally had the advantage of practiced talking points backed up by staff research, but I was an unabashed, occasionally effective advocate for my own positions. 'He told me you make him feel stupid,' my mother once shared, to my alarm. I didn't want my father to feel stupid. If he was going to shoulder massive responsibility, I wanted him to feel on top of his game. If he was going to fulfill his duties as president, he would have to be." Pages 204-205

"Watching the first of his two debates with 1984 Democratic presidential nominee Walter Mondale, I began to experience the nausea of a bad dream coming true. At 73, Ronald Reagan would be the oldest president ever reelected. Some voters were beginning to imagine grandpa—who can never find his reading glasses—in charge of a bristling nuclear arsenal, and it was making them nervous. Worse, my father now seemed to be giving them legitimate reason for concern. My heart sank as he floundered his way through his responses, fumbling with his notes, uncharacteristically lost for words. He looked tired and bewildered." Page 205.

"My father might himself have suspected that all was not as it should be. As far back as August 1986 he had been alarmed to discover, while flying over the familiar canyons north of Los Angeles, that he could no longer summon their names." Page 218.

The July 4, 1989 horse bucking and discovery of Alzheimer's:

"In July 1989, barely six months out of office, my father visited friends in Mexico. While out riding he was thrown when his horse shied at something in the trailside scrub. That my father, even at age 78, would be bucked off his mount was, in itself, an ominous sign. It's a wonder he didn't break any bones, but he did hit his head hard enough to cause a sizable contusion. After initially refusing medical attention, he ultimately relented and was transported to a hospital in San Diego. Surgeons opening his skull to relieve pressure on the brain emerged from the operating room with the news that they had detected what they took to be probable signs of Alzheimer's disease. No formal diagnosis was given, as far as I know. I have since learned from a doctor who happened to be interning at the hospital when my father was brought in that surgeons involved in his care, in what my informant characterized as 'shameful' behavior, violated my father's right to medical privacy by subsequently gossiping about his condition." Page 217.

"Doctors recommended to my mother that further tests of cognition be conducted the following year to measure any decline. Those tests, at the Mayo Clinic, confirmed the initial suspicion of Alzheimer's." Page 217.

"I've seen no evidence that my father (or anyone else) was aware of his medical condition while he was in office. Had the diagnosis been made in, say 1987, would he have stepped down? I believe he would have. Far less was known about the disease then, of course, than is known now. Today we are aware that the physiological and neurological changes associated with Alzheimer's can be in evidence years, even decades, before identifiable symptoms arise. The question, then, of whether my father suffered from the beginning stages of Alzheimer's while in office more or less answers itself." Pages 217-218.

http://www.usnews.com/news/blogs/wa...an-son-claims-dad-had-alzheimers-as-president
 

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It must play havoc on the mind of a narcissist... to know they will never achieve the greatness, or anywhere near that -of ones own father.
 

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Well put !
 
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