ProHealth health Vitamin and Natural Supplement Store and Health
Home  |  Log In  |  My Account  |  View Cart  View Your ProHealth Vitamin and Supplement Shopping Cart
800-366-6056  |  Contact Us  |  Help
Facebook Google Plus
Fibromyalgia  Chronic Fatigue Syndrome & M.E.  Lyme Disease  Natural Wellness  Supplement News  Forums  Our Story
Store     Brands   |   A-Z Index   |   Best Sellers   |   New Products   |   Deals & Specials   |   Under $10   |   SmartSavings Club

Trending News

Is Magnesium the Missing Link in Your Heart Healthy Routine?

Why the Mediterranean Diet Is so Successful

A Little Zinc Goes a Long Way

Supplementation with vitamin D associated with improved testosterone, erectile function among middle...

Vitamin D deficiency increases risk of chronic headache

Wearable biosensors can flag illness, Lyme disease, risk for diabetes; low airplane oxygen

VIDEO: The Best Brain Foods That Help Increase Your Memory!

More evidence for calorie restriction’s longevity effect

Iron (And More) For Lasting, Natural Energy

Affordable Care Act made cancer screening more accessible for millions, study finds

 
Print Page
Email Article

Neuroanatomic substrates of semantic memory impairment in Alzheimer's disease: patterns of functional MRI activation.

  [ 5 votes ]   [ Discuss This Article ]
By Saykin AJ, Flashman LA, Frutiger SA, Johnson SC, M • www.ProHealth.com • July 1, 1999


Impairment in semantic processing occurs early in Alzheimer's disease (AD) and differential impact on subtypes of semantic relations have been reported, yet there is little data on the neuroanatomic basis of these deficits. Patients with mild AD and healthy controls underwent 3 functional MRI auditory stimulation tasks requiring semantic or phonological decisions (match-mismatch) about word pairs (category-exemplar, category-function, pseudoword).

Patients showed a significant performance deficit only on the exemplar task. On voxel-based fMRI activation analyses, controls showed a clear activation focus in the left superior temporal gyrus for the phonological task; patients showed additional foci in the left dorsolateral prefrontal and bilateral cingulate areas. On the semantic tasks, predominant activation foci were seen in the inferior and middle frontal gyrus (left greater than right) in both groups but patients showed additional activation suggesting compensatory recruitment of locally expanded foci and remote regions, for example, right frontal activation during the exemplar task. Covariance analyses indicated that exemplar task performance was strongly related to signal increase in bilateral medial prefrontal cortex.

The authors conclude that fMRI can reveal similarities and differences in functional neuroanatomical processing of semantic and phonological information in mild AD compared to healthy elderly, and can help to bridge cognitive and neural investigations of the integrity of semantic networks in AD.

Source: J Int Neuropsychol Soc 1999 Jul;5(5):377-92
PMID: 10439584, UI: 99368439

(Department of Psychiatry, Dartmouth Medical School, Lebanon, NH 03756, USA. saykin@dartmouth.edu)




Post a Comment

Featured Products From the ProHealth Store
Ultra EPA  - Fish Oil Mitochondria Ignite™ with NT Factor® Vitamin D3 Extreme™

Looking for Vitamins, Herbs and Supplements?
Search the ProHealth Store for Hundreds of Natural Health Products


Article Comments



Be the first to comment on this article!

Post a Comment


 
NAD+ Ignite with Niagen

Featured Products

Optimized Curcumin Longvida® Optimized Curcumin Longvida®
Supports Cognition, Memory & Overall Health
Energy NADH™ 12.5mg Energy NADH™ 12.5mg
Improve Energy & Cognitive Function
Ultra EPA  - Fish Oil Ultra EPA - Fish Oil
Ultra concentrated source of essential fish oils
Mitochondria Ignite™ with NT Factor® Mitochondria Ignite™ with NT Factor®
Reduce Fatigue up to 45%

Natural Remedies

Restore Youthful Cognition and Well-Being Restore Youthful Cognition and Well-Being
Itching to Find Dry Skin Relief? Itching to Find Dry Skin Relief?
When a Good Night's Sleep Is Just a Daydream... When a Good Night's Sleep Is Just a Daydream...
Anti-Inflammatory Properties of Tart Cherry Anti-Inflammatory Properties of Tart Cherry
Curcumin - a Golden Gift of Nature with Benefits Still Untold Curcumin - a Golden Gift of Nature with Benefits Still Untold

CONTACT US
ProHealth, Inc.
555 Maple Ave
Carpinteria, CA 93013
(800) 366-6056  |  Email

· Become a Wholesaler
· Vendor Inquiries
· Affiliate Program
SHOP WITH CONFIDENCE
Credit Card Processing
SUBSCRIBE TO OUR NEWSLETTERS
Get the latest news about Fibromyalgia, M.E/Chronic Fatigue Syndrome, Lyme Disease and Natural Wellness

CONNECT WITH US ProHealth on Facebook  ProHealth on Twitter  ProHealth on Pinterest  ProHealth on Google Plus

© 2017 ProHealth, Inc. All rights reserved. Pain Tracker App  |  Store  |  Customer Service  |  Guarantee  |  Privacy  |  Contact Us  |  Library  |  RSS  |  Site Map