Prediction Models for the Erector Spinae Muscle Cross-Sectional Area

2015 ◽  
Vol 137 (7) ◽  
Author(s):  
Celal Gungor ◽  
Ruoliang Tang ◽  
Richard F. Sesek ◽  
Kenneth Bo Foreman ◽  
Sean Gallagher ◽  
...  
Keyword(s):  
Prediction Models ◽  
Absolute Error ◽  
Cross Sectional Area ◽  
Erector Spinae ◽  
Low Back ◽  
Sectional Area ◽  
Cross Sectional ◽  
Erector Spinae Muscle ◽  
Significant Difference ◽  
Mri Scans

Accurate and reliable “individualized” low back erector spinae muscle (ESM) data are of importance to estimate its force producing capacity. Knowing the force producing capacity, along with spinal loading, enhances the understanding of low back injury mechanisms. The objective of this study was to build regression models to estimate the ESM cross-sectional area (CSA). Measurements were taken from axial-oblique magnetic resonance imaging (MRI) scans of a large historical population [54 females and 53 males at L3/L4, 50 females and 44 males at L4/L5, and 41 females and 35 males at L5/S1 levels]. Results suggest that an individual's ESM CSA can be accurately estimated based on his/her gender, height, and weight. Results further show that there is no significant difference between the measured and estimated ESM CSAs, and expected absolute error is less than 15%.

Regression Models for the Erector Spinae Muscle Mass (ESMM) Cross-Sectional Area: Asymptomatic Populations

2019 ◽  
Vol 141 (8) ◽  
Author(s):  
Celal Gungor ◽  
Ruoliang Tang ◽  
Richard F. Sesek ◽  
Gerard A. Davis ◽  
Sean Gallagher
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Muscle Mass ◽  
Regression Models ◽  
Cross Sectional Area ◽  
Erector Spinae ◽  
Low Back ◽  
Sectional Area ◽  
Cross Sectional ◽  
Erector Spinae Muscle

Understanding low back muscle morphology is critical to understanding spinal loading and the underlying injury mechanisms, which help in characterizing risk and, therefore, minimize low back pain injuries. Individualized erector spinae muscle mass (ESMM) cross-sectional area (CSA) allows biomechanics practitioners to calculate individualized force generating capacities and spinal loadings for given tasks. The objective is to perform morphological analyses and then provide regression models to estimate the ESMM CSA of an individual with his/her subject characteristics. Thirty-five subjects (13 females and 22 males) without low back pain (LBP) history were included in this magnetic resonance imaging (MRI) study. Axial-oblique scans of low back region were used to measure the ESMM CSA. Subject demographics and anthropometrics were obtained and regressed over the ESMM CSA. Best-subset regression analyses were performed. Lean body mass (LBM) and the ankle, wrist, and head indexes were the most frequent predictive variables. Regression models with easy-to-measure variables showed smaller predictive power and increased estimation error compared to other regression models. Practitioners should consider this trade-off between model accuracy and complexity. An individual's ESMM CSA could be estimated by his/her individual characteristics, which enables biomechanical practitioners to estimate individualized low back force capacity and spinal loading.

Multifidus Muscle Size and Symmetry in Ballroom Dancers with and without Low Back Pain

2018 ◽  
Vol 39 (08) ◽  
pp. 630-635 ◽  
Author(s):  
Alyssa Smyers Evanson ◽  
Joseph Myrer ◽  
Dennis Eggett ◽  
Ulrike Mitchell ◽  
A. Johnson
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Cross Sectional Area ◽  
Muscle Size ◽  
Low Back ◽  
Sectional Area ◽  
Multifidus Muscle ◽  
Cross Sectional ◽  
Significant Difference ◽  
The Right

AbstractThe incidence of low back pain (LBP) among elite ballroom dancers is high and understanding associations between muscle morphology and pain may provide insight into treatment or training options. Research has linked multifidus muscle atrophy to LBP in the general and some athletic populations; however, this has not been examined in ballroom dancers. We compared the lumbar multifidus cross-sectional area (CSA) at rest in 57 elite level ballroom dancers (age 23±2.4 years; height, 174±11 cm; mass, 64±10 kg) divided into one of three pain groups, according to their self-reported symptoms, 1) LBP group (n=19), 2) minimal LBP (n=17), and 3) no LBP (n=21). There were no significant difference in demographics between the groups (P>0.05). The LBP group demonstrated significant differences in reported pain and Oswestry Disability Index scores compared to the other two groups. There was no significant difference between groups in multifidus cross-sectional area (P=0.49). Asymmetry was found in all groups with the overall left side being significantly larger than the right (P<0.002). Pain associated with segmental decrease in multifidus CSA was not observed in ballroom dancers with LBP, suggesting other reasons for persistent LBP in ballroom dancers.

scholarly journals MRI Assessment of Degeneration of Multifidus and Erector Spinae Muscles in Patients With Chronic Low Back Pain

2021 ◽  
Author(s):  
Alikemal Yazici ◽  
Tuba Yerlikaya ◽  
Adile Oniz
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Erector Spinae ◽  
Low Back ◽  
Sectional Area ◽  
Healthy Individuals ◽  
Cross Sectional ◽  
Fat Infiltration ◽  
Significant Difference ◽  
The Right

Abstract Background: The aim of this study was to investigate the degeneration of lumbar musculus multifidus (L.MF) and lumbar musculus erector spinae (L.ES) muscles in healthy individuals and patients with mechanical low back pain and lumbar discopathy without root compression (radiculopathy), and to examine the relationship between low back pain by comparing the results according to gender, pain and lumbar segments between the groups. Methods: The study included 30 healthy individuals (Group 1), 30 patients with mechanical low back pain (Group 2) and 30 patients with lumbar discopathy without root compression (radiculopathy) (Group 3). Pain severity was evaluated using a Visual Analogue Scale (VAS). Right and left L.MF and L.ES cross-sectional areas (CSA), total cross-sectional areas (TCSA =L.MF+L.ES), fat infiltrations, and asymmetries between the right and left sides were evaluated. L.MF and L.ES muscles CSA and TCSA, fat infiltrations, asymmetries between the right and left sides were evaluated in the patients at the L3-S1 level, in axial Magnetic Resonance Imaging.Results: The mean value of the CSA differed between the groups only in the right L.MF and in the healthy group (p=0.011). No statistically significant difference was observed between the TCSA values of the groups, but a significant difference was found between the groups in terms of fat infiltration in right and left L.MF and left L.ES (p=0.011, p=0.001, p=0.027, respectively). When CSA and TCSA were examined according to gender within the group, the values were found to be significantly higher in males (p<0.001). The CSA and TCSA values ​​of L.MF and L.ES differed between segments (L3-L4, L4-L5, L5-S1) (p<0.001). There was no asymmetry between the right/left CSA and TCSA of the groups. Fat infiltration differed according to gender (p=0.001) and segments (p<0.001).Conclusion: Fat infiltration in the lumbar multifidus muscle was associated with mechanical low back pain and lumbar discopathy. The fact that there was no difference between the cross-sectional area and the total cross-sectional area between the groups indicates the need to measure the FCSA or muscle atrophy due to fat infiltration in the evaluation of muscle mass, rather than CSA and TCSA.

scholarly journals Atrophy patterns in isolated subscapularis lesions

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Gernot Seppel ◽  
Andreas Voss ◽  
Daniel J. H. Henderson ◽  
Simone Waldt ◽  
Bernhard Haller ◽  
...  
Keyword(s):  
Muscle Atrophy ◽  
Area Ratio ◽  
Cross Sectional Area ◽  
Control Group ◽  
Sectional Area ◽  
Cross Sectional ◽  
Subscapularis Muscle ◽  
Mri Scans ◽  
The Mean ◽  
The Cross

Abstract Background While supraspinatus atrophy can be described according to the system of Zanetti or Thomazeau there is still a lack of characterization of isolated subscapularis muscle atrophy. The aim of this study was to describe patterns of muscle atrophy following repair of isolated subscapularis (SSC) tendon. Methods Forty-nine control shoulder MRI scans, without rotator cuff pathology, atrophy or fatty infiltration, were prospectively evaluated and subscapularis diameters as well as cross sectional areas (complete and upper half) were assessed in a standardized oblique sagittal plane. Calculation of the ratio between the upper half of the cross sectional area (CSA) and the total CSA was performed. Eleven MRI scans of patients with subscapularis atrophy following isolated subscapularis tendon tears were analysed and cross sectional area ratio (upper half /total) determined. To guarantee reliable measurement of the CSA and its ratio, bony landmarks were also defined. All parameters were statistically compared for inter-rater reliability, reproducibility and capacity to quantify subscapularis atrophy. Results The mean age in the control group was 49.7 years (± 15.0). The mean cross sectional area (CSA) was 2367.0 mm2 (± 741.4) for the complete subscapularis muscle and 1048.2 mm2 (± 313.3) for the upper half, giving a mean ratio of 0.446 (± 0.046). In the subscapularis repair group the mean age was 56.7 years (± 9.3). With a mean cross sectional area of 1554.7 mm2 (± 419.9) for the complete and of 422.9 mm2 (± 173.6) for the upper half of the subscapularis muscle, giving a mean CSA ratio of 0.269 (± 0.065) which was seen to be significantly lower than that of the control group (p < 0.05). Conclusion Analysis of typical atrophy patterns of the subscapularis muscle demonstrates that the CSA ratio represents a reliable and reproducible assessment tool in quantifying subscapularis atrophy. We propose the classification of subscapularis atrophy as Stage I (mild atrophy) in case of reduction of the cross sectional area ratio < 0.4, Stage II (moderate atrophy) in case of < 0.35 and Stage III (severe atrophy) if < 0.3.

Guideline Values for Minimum Nasal Cross-Sectional Area in Children

2018 ◽  
Vol 55 (8) ◽  
pp. 1043-1050
Author(s):  
Maija T. Laine-Alava ◽  
Siiri Murtolahti ◽  
Ulla K. Crouse ◽  
Donald W. Warren
Keyword(s):  
Cleft Lip ◽  
Cross Sectional Area ◽  
Adult Size ◽  
Nasal Airway ◽  
Sectional Area ◽  
Cross Sectional ◽  
Age Cohorts ◽  
Guideline Values ◽  
Significant Difference ◽  
Research Criteria

Objective: The purpose was to determine age-specific values of the minimum cross-sectional area of the nasal airway in children without cleft lip or palate and to assess whether gender differences occur with growth in order to develop guidelines for assessment in children with clefts. Participants: All schoolchildren aged 8 to 17 years who met the research criteria were studied during rest breathing using the pressure-flow technique. The children came from a rural area of 3800 inhabitants. Consecutive age cohorts were used for comparisons. Results: Nasal cross-sectional area increased in females from 0.38 cm2 in 8-year-olds to 0.58 cm2 in 17-year-olds. There was a decrease in size at ages 10 to 11 and 14 to 15 years. In males, the area increased from 0.40 to 0.68 cm2 and decreased slightly from 9 to 10 and 14 to 15 years. The annual changes were statistically significant in females between 8 and 9 and 11 to 13 years of age, and in males from 11 to 12, 13 to 14, and 15 to 17 years of age. Across gender, the only significant difference occurred at age 16. Conclusions: Our results indicate that the increase in nasal airway size is not consistent during growth. Nasal airway size showed almost equal values for both genders in young children but was systematically larger in boys from 14 years of age on. The results refer that by 17 years of age nasal airway may not have reached adult size in males.

Effects of Lumbar Stabilization Exercises with Real-Time Ultrasound Imaging Biofeedback on Lumbar Multifidus Muscle Cross-Sectional Area in Individuals with Chronic Nonspecific Low Back Pain: A Study Protocol for a Randomized Controlled Trial

2021 ◽  
Author(s):  
Sarafadeen Raheem ◽  
Sokunbi O. Ganiyu ◽  
Aminu A. Ibrahim ◽  
Anas Ismail ◽  
Mukadas O. Akindele ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Cross Sectional Area ◽  
Low Back ◽  
Sectional Area ◽  
Multifidus Muscle ◽  
Cross Sectional ◽  
Lumbar Multifidus ◽  
Lumbar Stabilization ◽  
Lumbar Multifidus Muscle

Abstract Background: Impairments in the lumbar multifidus muscle such as reduced muscle thickness and fat infiltrations are evident in individuals with low back pain. Lumbar stabilization exercises (LSE) with real-time ultrasound imaging (RUSI) biofeedback has been reported to improve preferential activation of as well as retention in the ability to activate of the lumbar multifidus muscle, thus enhancing recovery. However, the effects of using this treatment approach in individuals with nonspecific chronic low back pain (NCLBP) seemed not to have widely reported. The purpose of this study is, therefore, to investigate the effects of LSE with RUSI biofeedback on lumbar multifidus muscle cross-sectional area in individuals with NCLBP patients. Method: This study is a prospective, single-center, assessor-blind three-arm, randomized controlled to be conducted at National Orthopedic Hospital, Kano State, Nigeria. Ninety-one individuals with NCLBP will be randomly assigned into one of the three treatment groups of equal sample size (n = 30); LSE group, LSE with RUSI biofeedback group, or control (minimal intervention). The participants in the LSE and LSE with RUSI biofeedback group will also receive the same intervention as the control group. All participants will receive treatment twice weekly for 8 weeks. The primary outcome will be lumbar multifidus muscles cross-sectional area while the secondary outcomes will be pain, functional disability and quality of life. All outcomes will be assessed at baseline, and at 8 weeks and 3 months post-intervention.Discussion: The outcome of the study may support the evidence for the effectiveness of LSE with RUSI biofeedback in the rehabilitation of individuals with NCLBP. It may also provide a rationale for the physiotherapists to make use of diagnostic ultrasound as a feedback mechanism in enhancing the performance and retention of LSE program as well as monitoring the patient’s recovery.Trial registration: Pan African Clinical Trials Registry, (PACTR201801002980602), Registered on 16 January 2018.

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