scholarly journals Longitudinal Analysis of Paraspinal Muscle Cross-Sectional Area During Early Adulthood – A 10-Year Follow-Up MRI Study

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Teemu Mäki ◽  
Petteri Oura ◽  
Markus Paananen ◽  
Jaakko Niinimäki ◽  
Jaro Karppinen ◽  
...  
Keyword(s):  
Early Adulthood ◽  
Population Based ◽  
Cross Sectional Area ◽  
Erector Spinae ◽  
Paraspinal Muscle ◽  
Muscle Size ◽  
Sectional Area ◽  
Muscle Area ◽  
Cross Sectional

AbstractOnly a few previous studies have investigated paraspinal musculature (i.e., multifidus (MF), psoas major (PSM), erector spinae (ES)) in longitudinal, population-based settings. This study aimed to evaluate changes in the cross-sectional area (CSA) of the paraspinal muscles between the ages of 20 and 30 years. The study population consisted of a sub-cohort from the Northern Finland Birth Cohort 1986 (n = 298; 156 men, 142 women). Baseline magnetic resonance imaging was performed at a mean age of 21.3 years and follow-up imaging at 30.6 years. The CSA measurements were performed by tracing the paraspinal muscle outlines individually (MF, ES, PM) and all combined (total muscle area (TMA)) at the L4 cranial endplate level. The longitudinal data analysis was performed using generalized estimating equations modelling. The CSA of MF and ES increased during the follow-up among both sexes (men: MF + 5.7%, p < 0.001; ES + 2.7%, p = 0.001; and women: MF + 10.5%, p < 0.001; ES 9.2%, p = 0.001). The CSA of PM decreased among men (PM −4.0%, p < 0.001) but not among women (PM + 0.5%, p = 0.553). TMA increased significantly only among women (men: +0.5%, p = 0.425; women: +6.5%, p < 0.001). The increases in ES and TMA were more distinct among women than men (p < 0.001). Our study demonstrated clear age- and sex-related changes in paraspinal muscle size in early adulthood.

scholarly journals Risk factors for screw loosening in patients with adult degenerative scoliosis: the importance of paraspinal muscle degeneration

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Wei Wang ◽  
Weishi Li ◽  
Zhongqiang Chen
Keyword(s):  
Risk Factors ◽  
Cross Sectional Area ◽  
Erector Spinae ◽  
Paraspinal Muscle ◽  
Sectional Area ◽  
Muscle Degeneration ◽  
Screw Loosening ◽  
Degenerative Scoliosis ◽  
Cross Sectional ◽  
Adult Degenerative Scoliosis

Abstract Background Paraspinal muscle is an important component to maintain spinal stability. But the relationship between the degeneration of paraspinal muscle and postoperative screw loosening in patients with adult degenerative scoliosis has not been studied. The objective of this study was to investigate risk factors for screw loosening in patients with adult degenerative scoliosis, including paraspinal muscle degeneration. Methods We investigated 93 patients with adult degenerative scoliosis who underwent spinal interbody fusion and pedicle screw fixation surgery. The lateral curvature was located in the lumbar spine and the follow-up time was ≥ 2 years. The patients were divided into loosening and non-loosening groups. Screw loosening was defined as a 1-mm or wider circumferential radiolucent line around the pedicle screw. We checked the cross-sectional area of paraspinal muscles, spinopelvic parameters, bone mineral density, number of fusion segment, and other factors. The potential risk factors for screw loosening were investigated by using binary logistical regression analysis. Results Fifty-seven patients showed screw loosening, which is 63.4% of total. Compared with patients in the non-loosening group, the cross-sectional area of erector spinae and psoas major muscle at L5 level were significantly smaller in patients with screw loosening (P < 0.05). Among these factors, the number of fused segments and relative erector spinae total cross-sectional area were independent risk factors for screw loosening. Conclusions The degeneration of paraspinal muscle and the increase of fusion segment were independent factors for screw loosening in patients with adult degenerative scoliosis.

scholarly journals Isokinetic External Rotation Strength of Shoulder: Correlation with Age and Muscle Size

1970 ◽  
Vol 44 (160) ◽  
Author(s):  
Rabindra Lal Pradhan ◽  
E Itoi ◽  
T Shimizu ◽  
I Wakabayashi ◽  
K Sato
Keyword(s):  
External Rotation ◽  
Peak Torque ◽  
Magnetic Resonance Images ◽  
Cross Sectional Area ◽  
Muscle Size ◽  
Sectional Area ◽  
Muscle Area ◽  
Cross Sectional ◽  
Angular Velocities ◽  
The Individual

The purpose of this study was to determine the correlation between quantitative (cross sectional areas)evaluation of the posterior cuff muscles and mechanical strength in asymptomatic shoulders with specialreference to aging. The cross-sectional area of the combined infraspinatus and teres minor muscles weremeasured, in the sagittal oblique magnetic resonance images, in eighty-one patients with a mean age of44.06 years (range 19 - 74). These areas were correlated with the measured isokinetic strength in externalrotation at angular velocities of 60 deg/s and 180 deg/s using Cybex 770 NORM. The results show that therewas a gradual decrease in size of the muscles as the age of the individual increases. A strong correlation wasfound between aging and combined cross-sectional area and peak torque as well. The correlation betweencombined cross-sectional area and peak torques at both angular velocities were less strong. Further, thecorrelation between the peak torque/cross-sectional area ratio with aging was also less significant, whichmay imply that the decrease in the muscle strength was greater than the change in muscle area. Our resultssuggest that there may be other qualitative and biochemical factors that may determine the true strengthof the muscles in the aged population.Key Words: Aging, muscle, cross sectional area, strength, shoulder.

scholarly journals Radiological Assessment of Postoperative Paraspinal Muscle Changes After Lumbar Interbody Fusion With or Without Minimally Invasive Techniques

2021 ◽  
pp. 219256822199479
Author(s):  
Keigo Kameyama ◽  
Tetsuro Ohba ◽  
Tomoka Endo ◽  
Marina Katsu ◽  
Fujita Koji ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Interbody Fusion ◽  
Cross Sectional Area ◽  
Paraspinal Muscle ◽  
Lumbar Interbody Fusion ◽  
Sectional Area ◽  
Paraspinal Muscles ◽  
Cross Sectional ◽  
Muscle Density ◽  
Muscle Changes

Study Design: Retrospective cohort study. Background: Percutaneous pedicle screws (PPS) have the advantage of being able to better preserve the paraspinal muscles when compared with a traditional open approach. However, the nature of changes in postoperative paraspinal muscle after damage by lumbar fusion surgery has remained largely unknown. It is clinically important to clarify and compare changes in paraspinal muscles after the various surgeries. Objective: (1) To determine postoperative changes of muscle density and cross-sectional area using computed tomography (CT), and (2) to compare paraspinal muscle changes after posterior lumbar interbody fusion (PLIF) with traditional open approaches and minimally invasive lateral lumbar interbody fusions (LLIF) with PPS. Methods: We included data from 39 consecutive female patients who underwent open PLIF and 23 consecutive patients who underwent single-staged treatment with LLIF followed by posterior PPS fixation at a single level (L4-5). All patients underwent preoperative, 6 months postoperative, and 1-year postoperative CT imaging. Measurements of the cross-sectional area (CSA) and muscle densities of paraspinal muscles were obtained using regions of interest defined by manual tracing. Results: We did not find any decrease of CSA in any paraspinal muscles. We did find a decrease of muscle density in the multifidus at 1 year after surgery in patients in the PILF group, but not in those in LLIF/PPS group. Conclusions: One year after surgery, a significant postoperative decrease of muscle density of the multifidi was observed only in patients who underwent open PLIF, but not in those who underwent LLIF/PPS.

The area of eye muscle of beef cattle carcasses

1963 ◽  
Vol 3 (10) ◽  
pp. 249
Author(s):  
RM Seebeck
Keyword(s):  
Beef Cattle ◽  
Cross Sectional Area ◽  
Carcass Weight ◽  
Sectional Area ◽  
Muscle Area ◽  
Cross Sectional ◽  
Eye Muscle ◽  
Angus Cattle ◽  
The Cross

Variations in the cross-sectional area of eye muscle of carcasses cut between the tenth and eleventh ribs were investigated, using 105 Hereford and 51 Angus steers aged 20 months. These cattle consisted of three groups, born in successive years. At constant carcass weight, statistically significant differences in eye muscle area were found between breeds and between years. Breed and year differences were also found in eye muscle area with width and depth of eye muscle constant, so that there are limitations to the estimation of eye muscle area from width and depth measurements. A nomograph is given for estimating eye muscle area from width and depth for Hereford and Angus cattle, when all animals are reared in the same year and environment. The use of eye muscle area as an indicator of weight of carcass muscle is discussed.

Muscle volume vs. anatomical cross-sectional area: different muscle assessment does not affect the muscle size-strength relationship

2022 ◽  
pp. 110956
Author(s):  
Marcel B. Lanza ◽  
Hugo C. Martins-Costa ◽  
Carolina C. De Souza ◽  
Fernando V. Lima ◽  
Rodrigo C. Diniz ◽  
...  
Keyword(s):  
Cross Sectional Area ◽  
Muscle Volume ◽  
Muscle Size ◽  
Sectional Area ◽  
Cross Sectional ◽  
Strength Relationship

scholarly journals Ultrasonography to measure quadriceps muscle in critically ill patients: A literature review of reported methodologies

2019 ◽  
Vol 47 (5) ◽  
pp. 423-434 ◽  
Author(s):  
Luke M Weinel ◽  
Matthew J Summers ◽  
Lee-Anne Chapple
Keyword(s):  
Layer Thickness ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Muscle Wasting ◽  
Muscle Layer ◽  
Quadriceps Muscle ◽  
Cross Sectional Area ◽  
Muscle Size ◽  
Sectional Area ◽  
Cross Sectional

Muscle wasting in the intensive care unit (ICU) is common and may impair functional recovery. Ultrasonography (US) presents a modern solution to quantify skeletal muscle size and monitor muscle wasting. However, no standardised methodology for the conduct of ultrasound-derived quadriceps muscle layer thickness or cross-sectional area in this population exists. The aim of this study was to compare methodologies reported for the measurement of quadriceps muscle layer thickness (MLT) and cross-sectional area (CSA) using US in critically ill patients. Databases PubMed, Ovid, Embase, and CINAHL were searched for original research publications that reported US-derived quadriceps MLT and/or CSA conducted in critically ill adult patients. Data were extracted from eligible studies on parameters relating to US measurement including anatomical location, patient positioning, operator technique and image analysis. It was identified that there was a clear lack of reported detail and substantial differences in the reported methodology used for all parameters. A standardised protocol and minimum reporting standards for US-derived measurement of quadriceps muscle size in ICU is required to allow for consistent measurement techniques and hence interpretation of results.

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