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

Astaxanthin Is a Longevity Promoter

Meta-analysis links vitamin D deficiency with increased risk of mortality during 10.5 year median pe...

Prevent Or Reverse Diabetes: An Amazing Herbal Intervention

Exercise and Vitamin D Better Together for Heart Health

VIDEO: Essential Oils for Weight Loss

Can Valerian Root Help You Sleep Better?

Eight servings of veggies a day is clearly best for the heart

Can Ginkgo Give Your Brain a Boost?

Fighting Statin-Induced Diabetes with CoQ10

The Many Wonders of Calming Sandalwood Oil

 
Print Page
Email Article

Abstract: Diminished central activation during maximal voluntary contraction in chronic fatigue syndrome

  [ 19 votes ]   [ Discuss This Article ]
www.ProHealth.com • October 7, 2004


Clin Neurophysiol. 2004 Nov;115(11):2518-24. Schillings ML, Kalkman JS, van der Werf SP, van Engelen BG, Bleijenberg G, Zwarts MJ. Department of Clinical Neurophysiology, University Medical Centre Nijmegen, Internal postal code 314, P.O. Box 9101, 6500 HB Nijmegen, Netherlands.

Objective: We have investigated whether central activation failure (CAF) is increased during local muscle fatigue in chronic fatigue syndrome (CFS).

Methods: Fourteen female CFS patients and 14 age-matched healthy female controls made a 2 min sustained maximal voluntary contraction (MVC) of the biceps brachii muscle. Before, during, and after sustained MVC, electrical endplate stimulation was applied. Force and 5 channel surface EMG (sEMG) were registered.

Results: Although force responses upon stimulation during rest did not differ between patients and controls, MVC was significantly lower in patients. Already at the beginning of sustained MVC, CFS patients showed significantly larger CAF than controls (36.5+/-17.0% and 12.9+/-13.3%, respectively). For all individual patients mean CAF over the first 45 s was higher than 30%, while it was below 30% for all controls. Less peripheral fatigue in patients was demonstrated by the changes in muscle fibre conduction velocity and the differences between force responses before and after contraction.

Conclusions: Central activation is diminished in CFS patients. Possible causes include changed perception, impaired concentration, reduced effort and physiologically defined changes, e.g. in the corticospinal excitability or the concentration of neurotransmitters. As a consequence, demands on the muscle are lower, resulting in less peripheral fatigue. Significance: CFS patients show reduced central activation during MVC. The underlying pathophysiological processes remain still to be determined. PMID: 15465441 [PubMed - in process]




Post a Comment

Featured Products From the ProHealth Store
Mitochondria Ignite™ with NT Factor® Optimized Curcumin Longvida® Ultra EPA  - Fish Oil

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

Vitamin D3 Extreme™ Vitamin D3 Extreme™
50,000 IU Vitamin D3 - Prescription Strength
Ultra EPA  - Fish Oil Ultra EPA - Fish Oil
Ultra concentrated source of essential fish oils
Energy NADH™ 12.5mg Energy NADH™ 12.5mg
Improve Energy & Cognitive Function
Mitochondria Ignite™ with NT Factor® Mitochondria Ignite™ with NT Factor®
Reduce Fatigue up to 45%
Ultra ATP+, Double Strength Ultra ATP+, Double Strength
Get energized with malic acid & magnesium

Natural Remedies

The Super Antioxidant for Brain, Joint and Heart Health The Super Antioxidant for Brain, Joint and Heart Health
Vitamin E: Super Antioxidant We Only Thought We Knew Vitamin E: Super Antioxidant We Only Thought We Knew
Three-Step Strategy to Reverse Mitochondrial Aging Three-Step Strategy to Reverse Mitochondrial Aging
Natural Relief for Soreness, Pain and Swelling - Putting Out the Fire Natural Relief for Soreness, Pain and Swelling - Putting Out the Fire
Help for Soreness and Swelling: What Do Silkworms Have to Do With It? Help for Soreness and Swelling: What Do Silkworms Have to Do With It?

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