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Does lumbar dorsal ramus syndrome have an objective clinical basis?
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Does lumbar dorsal ramus syndrome have an objective clinical basis?

Author: TM Annaswamy Affiliation: Electrodiagnostic and Spine Sections, PM&R Service, Dallas VA Medical Center, 4500 S Lancaster Rd, Dallas, TX 75216; and Department of Physical Medicine & Rehabilitation, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX(∗). Electronic address: thiru.annaswamy@va.gov.; SM Bierner Affiliation: Department of PM&R and PM&R Residency Program, UT Southwestern Medical Center, Dallas, TX(†).; H Doppalapudi Affiliation: Methodist Health System, Dallas, TX(‡).
Edition/Format: Article Article : English
Publication:PM & R : the journal of injury, function, and rehabilitation, 2013 Dec; 5(12): 996-1006
Summary:
BACKGROUND: Degenerative processes can cause chronic low back pain that occasionally creates impingement of the lumbar dorsal rami, resulting in a clinical syndrome previously described as lumbar dorsal ramus syndrome (LDRS). OBJECTIVES: To evaluate the clinical basis of LDRS by comparing pain, disability, and objective measures of pathophysiology in 3 groups of subjects defined by needle electromyography  Read more...
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Document Type: Article
All Authors / Contributors: TM Annaswamy Affiliation: Electrodiagnostic and Spine Sections, PM&R Service, Dallas VA Medical Center, 4500 S Lancaster Rd, Dallas, TX 75216; and Department of Physical Medicine & Rehabilitation, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX(∗). Electronic address: thiru.annaswamy@va.gov.; SM Bierner Affiliation: Department of PM&R and PM&R Residency Program, UT Southwestern Medical Center, Dallas, TX(†).; H Doppalapudi Affiliation: Methodist Health System, Dallas, TX(‡).
ISSN:1934-1482
Language Note: English
Unique Identifier: 5534449653
Awards:

Abstract:

BACKGROUND: Degenerative processes can cause chronic low back pain that occasionally creates impingement of the lumbar dorsal rami, resulting in a clinical syndrome previously described as lumbar dorsal ramus syndrome (LDRS). OBJECTIVES: To evaluate the clinical basis of LDRS by comparing pain, disability, and objective measures of pathophysiology in 3 groups of subjects defined by needle electromyography examination (NEE) findings. DESIGN: Prospective group cohort study with retrospective chart review. SETTING: Veterans Affairs medical center outpatient clinic. PATIENTS: Subjects who had undergone lower limb NEE and lumbar magnetic resonance imaging. METHODS: A total of 71 subjects' records that met the study criteria were retrospectively reviewed for interventional spine procedures performed and to measure the lumbosacral paraspinal cross-sectional area (PSP CSA); 28 of the 71 subjects underwent further clinical assessment. One-way analysis of variance was performed to evaluate group differences. MAIN OUTCOME MEASUREMENTS: In the retrospective arm: (1) PSP CSAs measured at 4 lower lumbar disk levels (average of 3 consecutive slices/level) bilaterally and overall left and right lumbar average PSP CSA and (2) the frequency and type of interventional spine procedures performed. In the prospective arm: (1) temporal changes of NEE abnormalities, (2) pain measured using the Visual Analog Scale, (3) Pain Disability Questionnaire responses, and (4) Short Form-36 scores. RESULTS: The right L5 CSA was significantly greater in the group with mechanical low back pain compared with the group with lumbar radicular syndrome (F = 3.3; P < .05). No significant group differences were noted in the number of spine procedures performed. No significant differences in pain or disability scores were found among the groups. NEE findings improved over time predominantly in the LDRS group. CONCLUSIONS: LDRS is a diagnosis with identifiable NEE (lumbar multifidus denervation) findings and magnetic resonance imaging findings that may include lower lumbar paraspinal atrophy. NEE (paraspinal denervation) findings in persons with LDRS may change over time, and the clinical relevance of LDRS to pain, functional disability, and treatment response is unclear.

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Primary Entity

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    schema:description "DESIGN: Prospective group cohort study with retrospective chart review." ;
    schema:description "OBJECTIVES: To evaluate the clinical basis of LDRS by comparing pain, disability, and objective measures of pathophysiology in 3 groups of subjects defined by needle electromyography examination (NEE) findings." ;
    schema:description "MAIN OUTCOME MEASUREMENTS: In the retrospective arm: (1) PSP CSAs measured at 4 lower lumbar disk levels (average of 3 consecutive slices/level) bilaterally and overall left and right lumbar average PSP CSA and (2) the frequency and type of interventional spine procedures performed. In the prospective arm: (1) temporal changes of NEE abnormalities, (2) pain measured using the Visual Analog Scale, (3) Pain Disability Questionnaire responses, and (4) Short Form-36 scores." ;
    schema:description "METHODS: A total of 71 subjects' records that met the study criteria were retrospectively reviewed for interventional spine procedures performed and to measure the lumbosacral paraspinal cross-sectional area (PSP CSA); 28 of the 71 subjects underwent further clinical assessment. One-way analysis of variance was performed to evaluate group differences." ;
    schema:description "SETTING: Veterans Affairs medical center outpatient clinic." ;
    schema:description "PATIENTS: Subjects who had undergone lower limb NEE and lumbar magnetic resonance imaging." ;
    schema:description "RESULTS: The right L5 CSA was significantly greater in the group with mechanical low back pain compared with the group with lumbar radicular syndrome (F = 3.3; P < .05). No significant group differences were noted in the number of spine procedures performed. No significant differences in pain or disability scores were found among the groups. NEE findings improved over time predominantly in the LDRS group." ;
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