Format

Send to:

Choose Destination
See comment in PubMed Commons below
J Orthop Sports Phys Ther. 2012 Apr;42(4):352-62. doi: 10.2519/jospt.2012.3830. Epub 2011 Dec 21.

Postural function of the diaphragm in persons with and without chronic low back pain.

Author information

  • 1Department of Rehabilitation and Sport Medicine, Second Medical Faculty, Charles University and University Hospital Motol, Prague, Czech Republic.

Abstract

STUDY DESIGN:

A case-control study.

OBJECTIVES:

To examine the function of the diaphragm during postural limb activities in patients with chronic low back pain and healthy controls.

BACKGROUND:

Abnormal stabilizing function of the diaphragm may be an etiological factor in spinal disorders. However, a study designed specifically to test the dynamics of the diaphragm in chronic spinal disorders is lacking.

METHODS:

Eighteen patients with chronic low back pain due to chronic overloading, as ascertained via clinical assessment and magnetic resonance imaging, and 29 healthy subjects were examined. Both groups presented with normal pulmonary function test results. A dynamic magnetic resonance imaging system and specialized spirometric readings were used with subjects in the supine position. Measurements during tidal breathing (TB) and isometric flexion of the upper and lower extremities against external resistance with TB were performed. Standard pulmonary function tests, including respiratory muscle drive (PI(max) and PE(max)), were also assessed.

RESULTS:

Using multivariate analysis of covariance, smaller diaphragm excursions and higher diaphragm position were found in the patient group (P<.05) during the upper extremity TB and lower extremity TB conditions. Maximum changes were found in costal and middle points of the diaphragm. A 1-way analysis of covariance showed a steeper slope in the middle-posterior diaphragm in the patient group both in the upper extremity TB and lower extremity TB conditions (P<.05).

CONCLUSION:

Patients with chronic low back pain appear to have both abnormal position and a steeper slope of the diaphragm, which may contribute to the etiology of the disorder.

PMID:
22236541
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Atypon
    Loading ...
    Write to the Help Desk