Document Detail

A kinematic model to assess spinal motion during walking.
MedLine Citation:
PMID:  17108818     Owner:  NLM     Status:  MEDLINE    
STUDY DESIGN AND OBJECTIVES: A 3-dimensional multi-segment kinematic spine model was developed for noninvasive analysis of spinal motion during walking. Preliminary data from able-bodied ambulators were collected and analyzed using the model. SUMMARY OF BACKGROUND DATA: Neither the spine's role during walking nor the effect of surgical spinal stabilization on gait is fully understood. Typically, gait analysis models disregard the spine entirely or regard it as a single rigid structure. Data on regional spinal movements, in conjunction with lower limb data, associated with walking are scarce. METHODS: KinTrak software (Motion Analysis Corp., Santa Rosa, CA) was used to create a biomechanical model for analysis of 3-dimensional regional spinal movements. Measuring known angles from a mechanical model and comparing them to the calculated angles validated the kinematic model. Spine motion data were collected from 10 able-bodied adults walking at 5 self-selected speeds. These results were compared to data reported in the literature. RESULTS: The uniaxial angles measured on the mechanical model were within 5 degrees of the calculated kinematic model angles, and the coupled angles were within 2 degrees. Regional spine kinematics from able-bodied subjects calculated with this model compared well to data reported by other authors. CONCLUSIONS: A multi-segment kinematic spine model has been developed and validated for analysis of spinal motion during walking. By understanding the spine's role during ambulation and the cause-and-effect relationship between spine motion and lower limb motion, preoperative planning may be augmented to restore normal alignment and balance with minimal negative effects on walking.
Regina J Konz; Stefania Fatone; Rebecca L Stine; Aruna Ganju; Steven A Gard; Stephen L Ondra
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Validation Studies    
Journal Detail:
Title:  Spine     Volume:  31     ISSN:  1528-1159     ISO Abbreviation:  Spine     Publication Date:  2006 Nov 
Date Detail:
Created Date:  2006-11-19     Completed Date:  2007-02-12     Revised Date:  2009-07-09    
Medline Journal Info:
Nlm Unique ID:  7610646     Medline TA:  Spine (Phila Pa 1976)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  E898-906     Citation Subset:  IM    
Northwestern University Prosthetics Research Laboratory & Rehabilitation Engineering Research Program, Chicago, IL 60611, USA.
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MeSH Terms
Arthrometry, Articular
Gait / physiology
Head Movements
Imaging, Three-Dimensional
Models, Anatomic
Models, Biological*
Motion Pictures as Topic
Spinal Diseases / physiopathology
Spine / physiology*
Walking / physiology*
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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