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Tag Archive for: EMG

Episode

Chiropractic Science

069 – Dr. Walter Herzog – Biomechanics, Spinal Manipulation, Vertebral Artery and Gait

https://chiropracticscience.com/podcast-player/7932/drwalterherzog.mp3

Download file | Play in new window | Duration: 1:26:42 | Recorded on March 13, 2025

Subscribe: Apple Podcasts | CastBox | Player.fm | PocketCasts | Podcast Addict | Spotify | Stitcher | YouTube

In this interview Dr. Herzog and I discuss his research including: 1) the biomechanics of spinal manipulation; 2) spinal manipulation and the biomechanics of the vertebral artery; 3) spinal manipulation and gait and; 4) the sarcomere, titin and muscle contraction. Dr. Walter Herzog did his undergraduate training in Physical Education at the Federal Technical Institute in Zurich, Switzerland (1979), completed his doctoral research in Biomechanics at the University of Iowa (USA) in 1985, and completed postdoctoral fellowships in Neuroscience and Biomechanics in Calgary, Canada in 1987.

Currently, he is a Professor of Biomechanics with appointments in Kinesiology, Medicine, Engineering, and Veterinary Medicine, holds the Dr. Benno Nigg Chair in Biomechanics, Mobility and Longevity. He was the Canada Research Chair for Cellular and Molecular Biomechanics from 2001 to 2022 and the Killam Memorial Chair for Inter-Disciplinary Research from 2011 to 2021 at the University of Calgary.

His research interests are in musculoskeletal biomechanics with emphasis on mechanisms of muscle contraction focusing on the role of the structural protein titin, and the biomechanics of joints focusing on mechanisms of onset and progression of osteoarthritis.

Dr. Herzog is the recipient of the Borelli Award from the American Society of Biomechanics, the Career Award from the Canadian Society for Biomechanics, the Dyson Award from the International Society of Biomechanics in Sports, the Muybridge Award from the International Society of Biomechanics, and received the Killam Prize in Engineering from the Canada Council for the Arts for his contributions to biomedical research. He is the past president of the International, American and Canadian Societies for Biomechanics. He was inducted into the Royal Society of Canada in 2013.

Here is the video for this episode.



Click here to view Dr. Herzog’s google scholar page.

Here are a few of the articles we discuss in this podcast episode.

1.
Strain of the vertebral artery during passive neck movements and spinal manipulation of the cervical spine: An observational study.
Fagundes C, Herzog W.
J Bodyw Mov Ther. 2024 Oct;40:569-574. doi: 10.1016/j.jbmt.2024.05.011. Epub 2024 May 18.

PMID: 39593645

2.
A low-cost 2-D sarcomere model to demonstrate titin-related mechanisms for force production.
Baptista de Oliveira Medeiros H, de Brito Fontana H, Herzog W.
Adv Physiol Educ. 2024 Mar 1;48(1):92-96. doi: 10.1152/advan.00090.2023. Epub 2023 Dec 7.

PMID: 38059284

3.
Vertebral arteries do not experience tensile force during manual cervical spine manipulation applied to human cadavers.
Gorrell LM, Sawatsky A, Edwards WB, Herzog W.
J Man Manip Ther. 2023 Aug;31(4):261-269. doi: 10.1080/10669817.2022.2148048. Epub 2022 Nov 15.

PMID: 36382347 Free PMC article.

4.
Kinematics of the head and associated vertebral artery length changes during high-velocity, low-amplitude cervical spine manipulation.
Gorrell LM, Kuntze G, Ronsky JL, Carter R, Symons B, Triano JJ, Herzog W.
Chiropr Man Therap. 2022 Jun 1;30(1):28. doi: 10.1186/s12998-022-00438-0.

PMID: 35650649 Free PMC article.

5.
Reflex Responses of Neck, Back, and Limb Muscles to High-Velocity, Low-Amplitude Manual Cervical and Upper Thoracic Spinal Manipulation of Asymptomatic Individuals-A Descriptive Study.
Gorrell LM, Conway PJ, Herzog W.
J Manipulative Physiol Ther. 2019 Oct;42(8):572-581. doi: 10.1016/j.jmpt.2018.11.025.

PMID: 31864518

6.
Quantifying strain in the vertebral artery with simultaneous motion analysis of the head and neck: a preliminary investigation.
Piper SL, Howarth SJ, Triano J, Herzog W.
Clin Biomech (Bristol). 2014 Dec;29(10):1099-107. doi: 10.1016/j.clinbiomech.2014.10.004. Epub 2014 Oct 23.

PMID: 25457973

7.
Biomechanical characterization of cervical spinal manipulation in living subjects and cadavers.
Symons B, Wuest S, Leonard T, Herzog W.
J Electromyogr Kinesiol. 2012 Oct;22(5):747-51. doi: 10.1016/j.jelekin.2012.02.004. Epub 2012 Mar 7.

PMID: 22402264

8.
The biomechanics of spinal manipulation.
Herzog W.
J Bodyw Mov Ther. 2010 Jul;14(3):280-6. doi: 10.1016/j.jbmt.2010.03.004.

PMID: 20538226 Review.

9.
Preliminary report: biomechanics of vertebral artery segments C1-C6 during cervical spinal manipulation.
Wuest S, Symons B, Leonard T, Herzog W.
J Manipulative Physiol Ther. 2010 May;33(4):273-8. doi: 10.1016/j.jmpt.2010.03.007.

PMID: 20534313

10.
The forces applied by female and male chiropractors during thoracic spinal manipulation.
Forand D, Drover J, Suleman Z, Symons B, Herzog W.
J Manipulative Physiol Ther. 2004 Jan;27(1):49-56. doi: 10.1016/j.jmpt.2003.11.006.

PMID: 14739874

March 13, 2025/by Dean Smith, DC, PhD
https://chiropracticscience.com/wp-content/uploads/2025/03/WalterHerzog.jpg 518 350 Dean Smith, DC, PhD https://chiropracticscience.com/wp-content/uploads/2017/01/chiroscience-logo-website-title-300x167.jpg Dean Smith, DC, PhD2025-03-13 11:25:282025-03-13 16:00:25069 – Dr. Walter Herzog – Biomechanics, Spinal Manipulation, Vertebral Artery and Gait
Chiropractic Science

017- Chiropractic and Response Time, EMG and TMD with James DeVocht, DC, PhD

https://chiropracticscience.com/podcast-player/540/drjimdevocht.mp3

Download file | Play in new window | Duration: 58:18

Subscribe: Apple Podcasts | CastBox | Player.fm | PocketCasts | Podcast Addict | Spotify | Stitcher | YouTube

DeVocht (061205)James DeVocht, DC, PhD and I discuss research regarding the effect of chiropractic care on special operations forces reaction and response times, the biomechanical aspects of chiropractic care on patients, the cervical flexion-relaxation phenomenon and chiropractic treatment of temporomandibular disorders.

Dr. James DeVocht is an associate professor in the Palmer Center for Chiropractic Research at Palmer College of Chiropractic. He has a BS in physics (Brigham Young University, 1972), a DC (Palmer College of Chiropractic, 1983), a MS in mechanical engineering, with emphasis in biomedical engineering (Michigan Technological University, 1992), and a PhD in biomedical engineering (University of Iowa, 1996). He was in private practice in New Mexico (1984-1985). He has spent 11 years on active duty as an officer in the US Army, including 2 years as a research physicist. For the last 19 years he has been a research scientist at Palmer and is going to retire this year.

He has been a peer reviewer for several journals including Clinical Biomechanics, Journal of Electromyography and Kinesiology, and Journal of Manipulative and Physiological Therapeutics (JMPT). He has also been an examiner of the PhD thesis of a research student at Macquarie University, Australia. His research interests include the use of electromyography (EMG) to quantify the effect of chiropractic treatment, descriptive studies of chiropractic adjustments, and chiropractic treatment of temporomandibular disorders.

Here is a link to Dr. DeVocht’s publications on researchgate.

Articles Discussed in the Podcast:

1. Novel Electromyographic Protocols Using Axial Rotation and Cervical Flexion-Relaxation for the Assessment of Subjects With Neck Pain: A Feasibility Study.
DeVocht JW, Gudavalli K, Gudavalli MR, Xia T.
J Chiropr Med. 2016 Jun;15(2):102-11. doi: 10.1016/j.jcm.2016.04.013.
PMID: 27330512 [PubMed] Free PMC Article
Similar articles
2. A pilot study of a chiropractic intervention for management of chronic myofascial temporomandibular disorder.
DeVocht JW, Goertz CM, Hondras MA, Long CR, Schaeffer W, Thomann L, Spector M, Stanford CM.
J Am Dent Assoc. 2013;144(10):1154-63.
PMID: 24080932 [PubMed – indexed for MEDLINE] Free PMC Article
Similar articles
3. Chiropractic treatment of temporomandibular disorders using the activator adjusting instrument and protocol.
DeVocht JW, Schaeffer W, Lawrence DJ.
Altern Ther Health Med. 2005 Nov-Dec;11(6):70-3.
PMID: 16320863 [PubMed – indexed for MEDLINE]
Similar articles
4. Spinal manipulation alters electromyographic activity of paraspinal muscles: a descriptive study.
DeVocht JW, Pickar JG, Wilder DG.
J Manipulative Physiol Ther. 2005 Sep;28(7):465-71.
PMID: 16182019 [PubMed – indexed for MEDLINE]
Similar articles
5. Experimental validation of a finite element model of the temporomandibular joint.
Devocht JW, Goel VK, Zeitler DL, Lew D.
J Oral Maxillofac Surg. 2001 Jul;59(7):775-8.
PMID: 11429739 [PubMed – indexed for MEDLINE]
Similar articles

 

September 2, 2016/0 Comments/by Dean Smith, DC, PhD
https://chiropracticscience.com/wp-content/uploads/2016/08/DeVocht-061205.jpg 630 420 Dean Smith, DC, PhD https://chiropracticscience.com/wp-content/uploads/2017/01/chiroscience-logo-website-title-300x167.jpg Dean Smith, DC, PhD2016-09-02 06:13:082017-04-02 00:03:44017- Chiropractic and Response Time, EMG and TMD with James DeVocht, DC, PhD

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