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

16 Tips from 16 Years Sick

Fibromyalgia Fare Fit for All Seasons

Tangerine Oil: A Citrusy Essential Oil With Well-Rounded Uses

New Study Shows Artificial Sweeteners Lead to Diabetes

Essential Oils — An Effective and Healthy Option to Treat Headaches

Antioxidant treatment could halt neurodegeneration in early Parkinson's

Higher vitamin D levels associated with less severe disease in NAFLD patients

How zinc helps fight esophageal cancer

Krill Oil: Make This Omega-3 Supplement Part of Your Health Regimen

Everything You Need to Know About Black Cohosh

 
Print Page
Email Article

Visual loss and getting lost in Alzheimer's disease.

  [ 6 votes ]   [ Discuss This Article ]
By Tetewsky SJ, Duffy CJ • www.ProHealth.com • March 23, 1999


BACKGROUND: AD causes patients to get lost in familiar surroundings, in part because of visuospatial disorientation from parieto-occipital involvement. Parieto-occipital cortex analyzes the radial patterns of visual motion that create optic flow and guide movements through the environment by showing one's direction of self-movement.

OBJECTIVE: To determine whether AD patients are impaired in perceiving the visual patterns of optic flow, suggesting a perceptual mechanism of visuospatial disorientation.

METHODS: We studied the ability of young normal subjects, elderly normal subjects, and AD patients to see and interpret visual patterns, including the radial motion of optic flow. Each person sat in front of a panoramic computer display and gave push-button responses to indicate their perception of the projected visual stimuli. Spatial navigation was tested by asking questions about a recently traversed path.

RESULTS: Half of the AD subjects showed impaired optic flow perception that was associated with poor performance on the spatial navigation test, even though their perception of simple moving patterns was relatively preserved. Some AD subjects also showed a separate impairment in interpreting optic flow, so that they could not use those stimuli to judge their direction of self-movement.

CONCLUSIONS: AD greatly impairs the ability to see the radial patterns of optic flow. This may interfere with the use of visual information to guide self-movement and maintain spatial orientation.

Source: Neurology 1999 Mar 23;52(5):958-65
PMID: 10102412, UI: 99200535

(Department of Neurology, Center for Visual Science, The University of Rochester Medical Center, NY 14642, USA. )




Post a Comment

Featured Products From the ProHealth Store
FibroSleep™ Energy NADH™ 12.5mg Ultra EPA  - Fish Oil


Article Comments



Be the first to comment on this article!

Post a Comment


 
Optimized Curcumin Longvida with Omega-3

Featured Products

Optimized Curcumin Longvida® Optimized Curcumin Longvida®
Supports Cognition, Memory & Overall Health
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%
Vitamin D3 Extreme™ Vitamin D3 Extreme™
50,000 IU Vitamin D3 - Prescription Strength

Natural Remedies

Energy Breakthrough - One Fibromyalgia Patient’s Fortuitous Discovery Energy Breakthrough - One Fibromyalgia Patient’s Fortuitous Discovery
Vitamin E: Super Antioxidant We Only Thought We Knew Vitamin E: Super Antioxidant We Only Thought We Knew
The Big Blue Fish that Helps Chase the Blues Away The Big Blue Fish that Helps Chase the Blues Away
Herbal Rescue for High Blood Sugar Herbal Rescue for High Blood Sugar
Block Acid Reflux to Prevent Esophageal Problems! Block Acid Reflux to Prevent Esophageal Problems!

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