Navigation Links
Brain network decay detected in early Alzheimer's
Date:8/19/2013

In patients with early Alzheimer's disease, disruptions in brain networks emerge about the same time as chemical markers of the disease appear in the spinal fluid, researchers at Washington University School of Medicine in St. Louis have shown.

While two chemical markers in the spinal fluid are regarded as reliable indicators of early disease, the new study, published in JAMA Neurology, is among the first to show that scans of brain networks may be an equally effective and less invasive way to detect early disease.

"Tracking damage to these brain networks may also help us formulate a more detailed understanding of what happens to the brain before the onset of dementia," said senior author Beau Ances, MD, PhD, associate professor of neurology and of biomedical engineering.

Diagnosing Alzheimer's early is a top priority for physicians, many of whom believe that treating patients long before dementia starts greatly improves the chances of success.

Ances and his colleagues studied 207 older but cognitively normal research volunteers at the Charles F. and Joanne Knight Alzheimer's Disease Research Center at Washington University. Over several years, spinal fluids from the volunteers were sampled multiple times and analyzed for two markers of early Alzheimer's: changes in amyloid beta, the principal ingredient of Alzheimer's brain plaques, and in tau protein, a structural component of nerve cells.

The volunteers were also scanned repeatedly using a technique called resting state functional magnetic resonance imaging (fMRI). This scan tracks the rise and fall of blood flow in different brain regions as patients rest in the scanner. Scientists use the resulting data to assess the integrity of the default mode network, a set of connections between different brain regions that becomes active when the mind is at rest.

Earlier studies by Ances and other researchers have shown that Alzheimer's damages connections in the default mode network and other brain networks.

The new study revealed that this damage became detectable at about the same time that amyloid beta levels began to rise and tau levels started to drop in spinal fluid. The part of the default mode network most harmed by the onset of Alzheimer's disease was the connection between two brain areas associated with memory, the posterior cingulate and medial temporal regions.

The researchers are continuing to study the connections between brain network damage and the progress of early Alzheimer's disease in normal volunteers and in patients in the early stages of Alzheimer's-associated dementia.


'/>"/>

Contact: Michael C. Purdy
purdym@wustl.edu
314-286-0122
Washington University School of Medicine
Source:Eurekalert

Related medicine news :

1. Study Suggests Vaccine May Help Kids With Brain Cancer
2. Epilepsy Leads to More Brain Abnormalities Over Time
3. UCLA Brain Injury Research Center gets NCAA funding for research on sports concussions
4. Why is traumatic brain injury increasing among the elderly?
5. Brain Falters Near End of Life, but Games, Puzzles Might Slow Decline
6. Dental X-Rays May Be Linked to Benign Brain Tumors
7. Nonsurgical Method to Measure Brain Pressure Shows Promise
8. Researchers Map Brain Regions Linked to Intelligence
9. Football-related catastrophic brain injuries on the rise
10. Brain Tumor Vaccine Shows Promise in Early Trial
11. Brain Surgery Might Ease Tough-to-Treat OCD
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... ... October 13, 2017 , ... Southern ... and Jennifer Huggins, PharmD ’17, along with clinical associate professor Janice Frueh, ... cardiovascular diseases during the 15th Annual Women’s Health Conference. The SIU School ...
(Date:10/13/2017)... ... ... Apple Rehab Shelton Lakes , which specializes in the delivery of sub-acute ... of a disaster drill on October 3rd. , Apple Rehab participated with the Shelton ... well as the Connecticut Long Term Care Mutual Aid Plan (LTC-MAP). The LTC-MAP ...
(Date:10/13/2017)... (PRWEB) , ... October 13, 2017 , ... The Visiting ... Day Market. Featuring a collection of specialty vendors and unique items from across the ... and quality-focused health and wellness services offered by the VNA. The boutique will ...
(Date:10/13/2017)... Milford, NJ (PRWEB) , ... October 13, 2017 , ... ... weekend at scenic Alexandria Park in Milford, NJ. This free event, sponsored by ... and physical activity. The fun run is geared towards children of all ages; ...
(Date:10/13/2017)... ... 2017 , ... Talented host, actor Rob Lowe, is introducing ... new episode of "Success Files," which is an award-winning educational program broadcasted on ... subject in-depth with passion and integrity. , Sciatica occurs when the sciatic nerve ...
Breaking Medicine News(10 mins):
(Date:10/4/2017)... , Oct. 4, 2017  South Korean-based healthcare product ... training aide "cprCUBE" on Kickstarter. The device will educate ... cardiac arrests with better efficiency compared to the dated ... real-time feedback on efficacy of the compression for a ... has a goal to raise $5,000. ...
(Date:10/2/2017)... Diplomat Pharmacy, Inc. (NYSE: DPLO ... LLC , and named its founder as Diplomat,s chief ... Tennessee , will operate under Diplomat subsidiary ... offerings for health care partners to include IT outsourcing, ... "In an interoperable world, technology delivers comprehensive insight ...
(Date:10/2/2017)... announces the European launch of their new low volume, high throughput ... Cambridge, U.K on October 4th. The new ... unprecedented speed and sensitivity while using far less sample volume through ... ... ...
Breaking Medicine Technology: