• Magazine
    • Past Issues
    • Subscribe
    • Change Mailing Address
    • Surveys
    • Guidelines for Authors
    • Editorial Calendar
    • Editorial Deadlines
    • Dynamic Chiropractic
      • Newspaper
      • Subscription
    • The American Chiropractor
      • Magazine
  • Practice
    • Business Tips
    • Chiropractic Schools
    • Clinical & Technique
    • eBooks
    • eCourses
    • Sponsored Content
    • Infographics
    • Quizzes
    • Wellness & Nutrition
    • Personal Growth
    • Podcast
    • Coronavirus (COVID-19)
  • Resource Centers
  • Products & Services
    • Buyers Guide
    • Products Directory
    • Submit a Product
    • Vendor Login
  • Datebook
    • Become an Events Poster
    • Post an Event
    • View Events
  • Jobs
    • Jobs
    • Post a Job
  • Advertise
    • Advertising Information
    • Media Kit
    • Contact Us

Your Online Chiropractic Community

Chiropractic Economics Your Online Chiropractic Community
Subscribe
  • Home
  • Current Issue
  • News
  • Webinars
  • Chiropractic Research
  • Students

The effect of applied spinal manipulation force vector on resultant vertebral accelerations: an in vivo animal model

Chiropractic Economics December 9, 2010

Department of Kinesiology, Arizona State University, Tempe, Ariz.; Bone and Joint Research Center, Department of Orthopaedic Surgery, University of North Texas Health Science Center, Fort Worth, Texas; Department of Orthopaedic Surgery, John Peter Smith Hospital, Fort Worth, Texas; Department of Orthopaedic Surgery, Eeuwfeestkliniek Hospital, Antwerpen, Belgium; The Adelaide Centre for Spinal Research, Institute of Medical and Veterinary Science, Adelaide, South Australia      .

Abstract

Introduction

In the performance of spinal manipulative therapy (SMT) and/or chiropractic adjustment it is theorized that the application of force should be in a specific angle
to maximize efficiency of the therapeutic intervention. Recent research in an in situ porcine model found that SMT force vectors that were perpendicular to the spine maximized vertebral accelerations as opposed to directing forces vectored at 30 degrees cephalad or caudal.

The purpose of the current study was to determine the effect of varying SMT applied angle on vertebral accelerations in an in vivo ovine model.

Methods

Twelve healthy, young Merino sheep (mean 24 kilograms, s/d/ 3 kilograms) were examined using a protocol approved by the Institutional Animal Ethics Committee of the Institute for Medical and Veterinary Science in Adelaide, Australia. Prior to testing, anesthesia was induced with an intravenous injection of gram thiopentone and was maintained after endotracheal intubation by 2.5 percent halothane.

Throughout testing the animals were ventilated and the respiration rate was linked to the tidal volume keeping the monitored C02 between 40 to 60 mmHg.
To quantify the dynamic, vibration response of the spine 10g piezoelectric, triaxial accelerometers were attached to intraosseous pins rigidly fixed to the L2 and L4 spinous processes under fluoroscopic guidance (Figure 1). The X, Yand Zaxes of the accelerometers were oriented with respect to the mediallateral (ML), dorsoventral (DV) and cranialcaudal or axial (AX) axes of the vertebrae. Only AX acceleration responses are reported herein.

Related Posts

  • Is it time to drop the ‘E’ in EHR for chiropractic and expand health records?Is it time to drop the ‘E’ in EHR for chiropractic and expand health records?
  • The Joint Corp. Named to Fortune’s 2021 100 Fastest-Growing Companies ListThe Joint Corp. Named to Fortune’s 2021 100 Fastest-Growing Companies List
  • Chiropractic and Children
  • Kentucky law limits arbitrary reductions in chiropractic careKentucky law limits arbitrary reductions in chiropractic care
  • Study: Taurine nutrient may have cardiovascular benefitsStudy: Taurine nutrient may have cardiovascular benefits
  • SpiderTech launches in JapanSpiderTech launches in Japan

Filed Under: Instrument Adjusting

Current Issue

CE issue 12 cover

Follow Us

  • Facebook
  • Twitter
  • Instagram
  • LinkedIn
  • YouTube logoYouTube logoYouTube

Compare Subscriptions

Dynamic Chiropractic

The American Chiropractor

3948 3rd Street South #279,

Jacksonville Beach, FL 32250

Phone 904.285.6020

CONTACT US »

Privacy Policy & Terms of Service

Copyright © 2021, All Rights Reserved

SUBSCRIBE TO THE MAGAZINE

Get Chiropractic Economics magazine
delivered to your home or office. Just
fill out our form to request your FREE
subscription for 20 issues a year,
including two annual Buyers Guides.

SUBSCRIBE NOW »

Latest Chiropractic News

  • Cleveland University-Kansas City’s College of Chiropractic Celebrates a Century of Health Care Education
  • ChiroThon to bring back old-school telethon during chiropractic’s The National
  • Life University receives two chiropractic research awards