Female and male trunk geometry: size and prediction of the spine loading trunk muscles derived from MRI

Marras, William S.; Jorgensen, Michael J.; Granata, Kevin P.; Wiand, B.

doi:10.1016/s0268-0033(00)00046-2

Cited by 239 publications

(170 citation statements)

References 22 publications

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“…Abe et al (2003) reported that the muscle CSA at the iliac crest in women was only 61% of that in men. From the findings of Marras et al (2001), the physiological CSA of the psoas major for women was about 54% of that for men. Taking these findings into account, it is reasonable to assume that, for boys and girls, the sex difference in the size of the psoas major will be greater than that in the size of limb muscles.…”

Section: ) Sports Photonics Laboratory Hamamatsu Photonics Kk 2) mentioning

confidence: 98%

Sex Differences in the Cross-sectional Areas of Psoas Major and Thigh Muscles in High School Track and Field Athletes and Nonathletes

Hoshikawa

Muramatsu

Iida

et al. 2011

J Physiol Anthropol

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The present study aimed to examine the sex differences in the cross-sectional areas of the psoas major, quadriceps femoris, hamstrings, and adductors in high school track and field athletes and nonathletes. The cross-sectional areas of the psoas major at L4-L5 and three thigh muscles at the mid-thigh were determined in the right side of the body using magnetic resonance imaging in 61 sprinters (29 boys and 32 girls), 50 jumpers (28 boys and 22 girls), 33 throwers (18 boys and 15 girls), and 40 nonathletes (20 boys and 20 girls), aged from 16 to 18 yrs. On the whole, the cross-sectional area for every muscle group was greater in the athletes than in the nonathletes and in the boys than in the girls. The average value of the cross-sectional area for the girls as a percentage of that for the boys in every subject group was lower in the psoas major (57.6-64.7%) than in the thigh muscles (67.8-82.9%). Among the thigh muscles, the muscle group which showed significant sex differences in the ratio of cross-sectional area to the two-third power of lean body mass was limited to the quadriceps femoris in the sprinters and nonathletes and hamstrings in the throwers. However, the ratio for the psoas major was significantly higher in the boys than in the girls in all subject groups. The current results indicate that, although regular participation in sports training during adolescence promotes hypertrophy in the psoas major and thigh muscles in not only boys but also girls, a greater sex difference exists in the muscularity of the psoas major than of the thigh muscles, in athletes and nonathletes.

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Section: ) Sports Photonics Laboratory Hamamatsu Photonics Kk 2) mentioning

confidence: 98%

Sex Differences in the Cross-sectional Areas of Psoas Major and Thigh Muscles in High School Track and Field Athletes and Nonathletes

Hoshikawa

Muramatsu

Iida

et al. 2011

J Physiol Anthropol

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“…Thoracic ROM showed a significant correlation with the T/L ratio, but no relationship with age and back muscle strength. In previous studies, lumbar muscle provides a high percentage of back muscle [39], and thus back muscle has been shown to affect the lumbar lordosis angle and lumbar ROM [31,40]. Therefore, the relationship of thoracic ROM with SF-36 PCS and the absence of a close relationship with back muscle strength suggest that maintenance of thoracic ROM is also important for good QOL of males, in addition to back muscle strength.…”

Section: Sagittal Balance In the Elderlymentioning

confidence: 98%

Back muscle strength and spinal mobility are predictors of quality of life in middle-aged and elderly males

et al. 2010

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With aging of society, clarification of the relationship between QOL and abnormal posture in the elderly may allow improvement of QOL through any preventive methods and training. However, sagittal balance has not been studied widely and most studies have focused on postmenopausal patients with osteoporosis. In this report, we provide the first evaluation of the simultaneous effects of degenerative changes on radiograph, spinal range of motion (ROM), sagittal balance, and back muscle strength, and examine the influence of these effects on QOL of the middleaged and elderly male subjects. The subjects were 100 Japanese males who underwent a basic health checkup. Lumbar lateral radiograph, sagittal balance and spinal mobility determined with SpinalMouse Ò and back muscle strength were measured. The thoracic/lumbar angle ratio (T/L ratio) was used as an index of sagittal balance. SF-36 physical component summary (PCS) scores showed a significant negative correlation with age (r = -0.377), osteophyte score (r = -0.246) and T/L ratio (r = -0.214), and a significant positive correlation with lumbar lordosis angle (r = 0.271), thoracic ROM (r = 0.282), and back muscle strength (r = 0.549). Multiple regression analysis indicated that thoracic spinal ROM (r = 0.254, p \ 0.01) and back muscle strength (r = 0.488, p \ 0.0001) were significantly associated with SF-36 PCS (R 2 = 0.403).In conclusion, QOL of the middle-aged and elderly male subjects was related to sagittal balance, lumbar lordosis angle, spinal ROM, and back muscle strength. Exercise including muscle strength and spinal ROM may be able to influence these primary factors related to QOL. Back muscle strength and thoracic ROM impact on improvement of QOL in the middle-aged and the elderly.

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“…Piecing together data from several dissection studies is not ideal (Arnold et al 2010). Hence, in order to increase accuracy and consistency, the data for muscle groups were normalized against the erector spinae and compared with the data presented by Marras et al (2001). Our motivation for using the ES muscle group to normalize the other muscle groups was driven by the fact that it was both the largest muscle group and that there were more data on this muscle group than any of the others.…”

Section: Determination Of Muscle Parametersmentioning

confidence: 99%

A Musculoskeletal model for the lumbar spine

Christophy

Senan

Lotz

et al. 2011

Biomech Model Mechanobiol

259

228

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A new musculoskeletal model for the lumbar spine is described in this paper. This model features a rigid pelvis and sacrum, the five lumbar vertebrae, and a rigid torso consisting of a lumped thoracic spine and ribcage. The motion of the individual lumbar vertebrae was defined as a fraction of the net lumbar movement about the three rotational degrees of freedom: flexion-extension lateral bending, and axial rotation. Additionally, the eight main muscle groups of the lumbar spine were incorporated using 238 muscle fascicles with prescriptions for the parameters in the Hill-type muscle models obtained with the help of an extensive literature survey. The features of the model include the abilities to predict joint reactions, muscle forces, and muscle activation patterns. To illustrate the capabilities of the model and validate its physiological similarity, the model's predictions for the moment arms of the muscles are shown for a range of flexion-extension motions of the lower back. The model uses the OpenSim platform and is freely available on https://www.simtk.org/home/lumbarspine to other spinal researchers interested in analyzing the kinematics of the spine. The model can also be integrated with existing OpenSim models to build more comprehensive models of the human body.

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Female and male trunk geometry: size and prediction of the spine loading trunk muscles derived from MRI

Cited by 239 publications

References 22 publications

Sex Differences in the Cross-sectional Areas of Psoas Major and Thigh Muscles in High School Track and Field Athletes and Nonathletes

Sex Differences in the Cross-sectional Areas of Psoas Major and Thigh Muscles in High School Track and Field Athletes and Nonathletes

Back muscle strength and spinal mobility are predictors of quality of life in middle-aged and elderly males

A Musculoskeletal model for the lumbar spine

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