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

Vitamin D supplements, sleep could help manage pain

Bacopa: The Herb That May Increase Your Brain Power

Lilac Oil: More Than Just for Fragrance

Eat More Yogurt and Avoid Osteoporosis

Safflower: An Economically Important Herb That Can Benefit Humans and Animals Alike

What Is Bilberry Good For?

Coffee, herbal tea may help prevent liver fibrosis

Crafty Uses for Carrot Seed Oil

Resveratrol Improves Arteries

Higher omega 3 levels linked to improved brain blood flow

 
Print Page
Email Article

Mechanisms underlying diminished novelty-seeking behavior in patients with probable Alzheimer's disease.

  [ Not Yet Rated ]   [ Discuss This Article ]
By Daffner KR, Mesulam MM, Cohen LG, Scinto LF • www.ProHealth.com • January 1, 1999


OBJECTIVE: To better understand apathy and disengagement in patients with Alzheimer's disease (AD), the authors investigated possible behavioral mechanisms underlying diminished novelty-seeking activity in patients with probable AD.

BACKGROUND: Apathy and disengagement have been shown to be the most common behavioral changes associated with AD.

METHOD: Patients and age-matched normal controls had their eye movements recorded while pairs of line drawings pitting an incongruous figure against a congruous figure were shown on a screen for 12 seconds. Characteristics of a subset of AD patients who were indifferent to novel visual stimuli as measured by exploratory eye movements were compared to those of a subset of AD patients who were attracted to novel stimuli to a degree similar to that of normal controls.

RESULTS: The indifferent patients were judged by informants, who completed a personality questionnaire, to exhibit a greater degree of apathy. The two AD groups did not differ in overall dementia severity or performance on a Saccade-to-Target Task that required shifts of attention and gaze. In a separate task, the indifferent patients were able to accurately identify the more novel stimuli in 97.5% of trials. Normal control subjects exhibited a strong bias toward processing novel stimuli, directing a higher proportion of their first fixations and dwell time to the incongruous stimuli whether the analysis was run for 3, 6, or 12 seconds of viewing. Indifferent patients did not direct their initial fixation toward novel stimuli and distributed their looking time evenly between incongruous and congruous stimuli throughout all measured intervals.

CONCLUSIONS: The results suggest that the indifference to novelty observed in some patients with probable AD cannot simply be attributed to global cognitive decline, more elementary attentional deficits, more rapid habituation of response to novel stimuli, or an inability to discriminate upon demand between stimuli of varying degrees of novelty. It is more likely that their behavior reflects a disruption, by AD pathology, of neural systems that modulate behavioral engagement and maintain attentional bias toward novel events in the environment.

Source: Neuropsychiatry Neuropsychol Behav Neurol 1999 Jan;12(1):58-66
PMID: 10082334, UI: 99180371

(Brigham Behavioral Neurology Group and Laboratory of Higher Cortical Functions, Division of Cognitive and Behavioral Neurology, Brigham & Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA. )




Post a Comment

Featured Products From the ProHealth Store
FibroSleep™ Optimized Curcumin Longvida® 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

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
FibroSleep™ FibroSleep™
The All-in-One Natural Sleep Aid
Vitamin D3 Extreme™ Vitamin D3 Extreme™
50,000 IU Vitamin D3 - Prescription Strength

Natural Remedies

The Fast-Acting Solution for Healthy Digestive Function The Fast-Acting Solution for Healthy Digestive Function
The Guaifenesin Story: A centuries-old bark extract used for clearing the airways – now key to a popular FM symptom-reversal protocol The Guaifenesin Story: A centuries-old bark extract used for clearing the airways – now key to a popular FM symptom-reversal protocol
Research Links Green Tea to Weight Loss Research Links Green Tea to Weight Loss
Rejuvenating the Brain - How PQQ Helps Power Up Mental Processing Rejuvenating the Brain - How PQQ Helps Power Up Mental Processing
Complete and Natural Menopause Relief Complete and Natural Menopause Relief

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