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Motion Capture Analysis of Sacroiliac Joint Motion After Manipulation

This study has been completed.
Information provided by (Responsible Party):
Dennis Enix, DC, MBA, Logan College of Chiropractic Identifier:
First received: February 12, 2008
Last updated: May 1, 2013
Last verified: May 2013
The purpose of this study is to examine the effects of manipulation on sacroiliac joint motion using a Polhemus motion capture system.

Condition Intervention
Sacroiliac Joint Pain
Procedure: Manipulation

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Motion Capture Analysis of Sacroiliac Joint Motion After Manipulation

Further study details as provided by Logan College of Chiropractic:

Primary Outcome Measures:
  • Sacroiliac joint motion was assessed with the Polhemus Liberty motion capture system. [ Time Frame: Pre and Post therapy ]

Enrollment: 20
Study Start Date: January 2007
Study Completion Date: March 2008
Primary Completion Date: March 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Procedure: Manipulation
HVLA manipulation to Sacroiliac Joint

Detailed Description:

The Sacroiliac (SI) joint is a diarthrodial joint with the contradictory biomechanical function of transmitting compressive loads from the lumbar spine to the lower extremity while maintaining a nutating motion in the pelvis.

Recent studies identify the Sacroiliac (SI) joints as a significant source of pain in patients with chronic low back pain, contributing up to 27%. Recent studies have demonstrated that historical and physical examination findings and radiological imaging alone are insufficient to diagnose SI joint pain.

The purpose of this study is to examine the effects of manipulation on sacroiliac joint motion using a Polhemus motion capture system. The Absolute angular deviation of sacroiliac joint motion will be assessed during the normal gait cycle with the Polhemus Liberty motion capture system. Six sensors will be attached to specific anatomical landmarks of the pelvis which recorded motion characteristics while walking on a treadmill at 5 mph. The subjects then receive a HVLA manipulation to the SI joint and were retested at the same treadmill speed.

The Motion capture system tracks objects at a speed of 240 updates per second on all sensors simultaneously. The latency of data sampling is less than 4ms; 240 x 60 sec x 8 Sensors totaling 115,200 data points per minute. The system generates and tracks electromagnetic fields (EMF), computes position and orientation of sensors in an X, Y, and Z coordinate system while interfacing with a computer. The EMF source contains electromagnetic coils that emit a magnetic field. The source is the system's reference frame for sensor measurements. The sensor contains electromagnetic coils (accelerometers) that detect the position and orientation of the magnetic fields emitted by the EMF source.


Ages Eligible for Study:   20 Years to 40 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Ages between 20 and 40
  • Ability to maintain normal balance
  • Willingness to undergo HVLA manipulation to the SI Joints
  • Normal blood pressure

Exclusion Criteria:

  • Any visual or vestibular condition or systemic illness that would affect balance
  • Any recent surgery, unstable joints of the lower extremity, recent hip and knee joint replacements or fitted hip or knee pins, bolts and/or plates
  • Currently have any infection, acute inflammation, recent wounds, injury, tumors or other malignancy
  • Currently taking any medications; prescription or herbal muscle stimulants, relaxants, etc.
  • A history of acute disc herniation, discopathy or spondylolysis
  • A history of acute thrombosis, serious cardiovascular disease, diabetes, have irregular heartbeats(arrhythmia) or wear a pacemaker
  • Any implanted device or prosthesis type of device
  • Any Spinal manipulation within 48 hours
  • Ages under 20 and over 40
  • Estimated BMI greater than 30
  Contacts and Locations
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Please refer to this study by its identifier: NCT00620906

United States, Missouri
Logan College of Chiropractic
Chesterfield, Missouri, United States, 63006
Sponsors and Collaborators
Logan College of Chiropractic
  More Information

Responsible Party: Dennis Enix, DC, MBA, Assistant Professor, Logan College of Chiropractic Identifier: NCT00620906     History of Changes
Other Study ID Numbers: RD0524070094
Study First Received: February 12, 2008
Last Updated: May 1, 2013

Keywords provided by Logan College of Chiropractic:
manual therapy
Sacroiliac joint
effects on manipulation on sacroiliac joint

Additional relevant MeSH terms:
Joint Diseases
Musculoskeletal Diseases
Neurologic Manifestations
Nervous System Diseases
Signs and Symptoms processed this record on April 21, 2017