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Asghar Rezasoltani - One of the best experts on this subject based on the ideXlab platform.
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Pages 423–428 Isometric cervical extension force and dimensions of Semispinalis Capitis muscle
2015Co-Authors: Asghar Rezasoltani, Phd Jari Ylinen, Md Veikko VihkoAbstract:Abstract—The anatomy of the human cervical region has a special complexity. Ultrasonography is a scanning technique, which has been successfully used to identify and measure the cervical muscle dimensions. The purpose of this study was to detect with the use of real-time ultrasonography the dimen-sional changes of the human Semispinalis Capitis muscle (SECM) during isometric cervical extension. Six junior ice hockey players took part in the study. We simultaneously mea-sured the values of estimates, such as breadth or anteroposte-rior dimension (APD) and width or lateral dimension (LD), of the SECM cross-sectional area during isometric cervical exten-sion at different maximum voluntary contraction (MVC) per-cent levels (0%, 20%, 40%, 60%, 80%, and 100%). The result of multiplication of the linear dimensions (APD × LD), considered as the size of the SECM, increased (p < 0.05) with increasing the level of the cervical extension force. The correlation between muscle size and extension force of 100% MVC was r = 0.79 (p = 0.05). The ultrasonography metho
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The variation of the strength of neck extensor muscles and Semispinalis Capitis muscle size with head and neck position.
Journal of Bodywork and Movement Therapies, 2013Co-Authors: Asghar Rezasoltani, R. Nasiri, A.m. Faizei, G. Zaafari, A.s. Mirshahvelayati, L. BakhshidarabadAbstract:Semispinalis Capitis muscle (SECM) is a massive and long cervico-thoracic muscle which functions as a main head and neck extensor muscle. The aim of this study was to detect the effect of head and neck positions on the strength of neck extensor muscles and size of SECM in healthy subjects. Thirty healthy women students voluntarily participated in this study. An ultrasonography apparatus (Hitachi EUB 525) and a system of tension-meter were used to scan the right SECM at the level of third cervical spine and to measure the strength of neck extensor muscles at three head and neck positions. Neck extensor muscles were stronger in neutral than flexion or than extension positions while the size of SECM was larger in extension than neutral or than flexion position. The force generation capacity of the main neck extensor muscle was lower at two head and neck flexion and extension positions than neutral position.
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The sign of unilateral neck Semispinalis Capitis muscle atrophy in patients with chronic non-specific neck pain.
Journal of Back and Musculoskeletal Rehabilitation, 2012Co-Authors: Asghar Rezasoltani, Khosro Khademi-kalantari, Alireza Ahmadipoor, Khodabakhsh JavanshirAbstract:Background and objectives: Neck muscles have a major role in normal stability and mobility of cervical spine in healthy subjects. Weakness and related atrophy of these muscles may be a causative factor in cervical pain among office workers. The aim of this study was to compare the size and asymmetry of the neck Semispinalis Capitis muscle (SECM) between a group of female office workers with unilateral chronic non-specific neck pain (CNNP) and a group of healthy control subjects. Material and method: Twenty female office workers (10 patients with unilateral CNNP and 10 healthy subjects) participated in this study. The right and left SECM sizes, anterior posterior dimension (APD) and lateral dimension (LD) were measured by an ultrasonography apparatus. The size of SECM was calculated as APD × LD. Results: The SECM size and the ratio of the size to body weight in patients were less than that of controls (P < 0.05, P < 0.001). The size of SECM was also smaller in affected side than unaffected side in patients group (P < 0.05). Between sides asymmetry of SECM size was higher in patients than that of controls (P
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the sign of unilateral neck Semispinalis Capitis muscle atrophy in patients with chronic non specific neck pain
Journal of Back and Musculoskeletal Rehabilitation, 2012Co-Authors: Asghar Rezasoltani, Alireza Ahmadipoor, Khosro Khademikalantari, Khodabakhsh JavanshirAbstract:Background and objectives: Neck muscles have a major role in normal stability and mobility of cervical spine in healthy subjects. Weakness and related atrophy of these muscles may be a causative factor in cervical pain among office workers. The aim of this study was to compare the size and asymmetry of the neck Semispinalis Capitis muscle (SECM) between a group of female office workers with unilateral chronic non-specific neck pain (CNNP) and a group of healthy control subjects. Material and method: Twenty female office workers (10 patients with unilateral CNNP and 10 healthy subjects) participated in this study. The right and left SECM sizes, anterior posterior dimension (APD) and lateral dimension (LD) were measured by an ultrasonography apparatus. The size of SECM was calculated as APD × LD. Results: The SECM size and the ratio of the size to body weight in patients were less than that of controls (P < 0.05, P < 0.001). The size of SECM was also smaller in affected side than unaffected side in patients group (P < 0.05). Between sides asymmetry of SECM size was higher in patients than that of controls (P <0.001). The mean APD of SECM of patients was less than that of controls (P < 0.01). There was not significant difference in LD between two groups. Conclusions: Neck SECM size and asymmetry measurements and the ratio of SECM size to body weight as well as APD appeared to be useful parameters to detect neck muscle atrophy in patients with CNNP.
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Preliminary study of neck muscle size and strength measurements in females with chronic non-specific neck pain and healthy control subjects
Manual Therapy, 2010Co-Authors: Asghar Rezasoltani, Ahmadipor Ali-reza, Khademi-kalantari Khosro, Rahimi AbbassAbstract:Neck muscle weakness and atrophy are two common causes of pain and disability among office workers. The aim of this study was to compare the strength of the neck extensor and flexor muscles and the size of the Semispinalis Capitis muscle (SECM) in patients with chronic non-specific neck pain (CNNP) and healthy subjects. Twenty female office workers (10 patients with CNNP and 10 healthy subjects) participated in this study. The strength of the neck extensor and flexor muscles was measured by an isometric device and the SECM size was measured by ultrasonography. Neck muscle strength, size of the SECM and the ratios of neck strength to body weight, neck extensor strength to SECM size, SECM size to body weight and neck flexor to extensor strength were all significantly lower in patients compared to controls (P < 0.05). In conclusion, neck strength, the size of the SECM and the ratio of neck muscle strength to SECM size appear to be useful parameters in appraising patients with CNNP.
Veikko Vihko - One of the best experts on this subject based on the ideXlab platform.
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Neck muscle ultrasonography of male weight-lifters, wrestlers and controls.
Scandinavian Journal of Medicine & Science in Sports, 2007Co-Authors: Asghar Rezasoltani, Esko Mälkiä, Veikko VihkoAbstract:The purpose of this cross-sectional study was to evaluate the effect of different sport training regimens on the size of the neck Semispinalis Capitis muscle (SECM). The cross-sectional area (CSA) and the linear dimensions of the SECM were measured bilaterally by real-time ultrasonography. Ten young Finnish elite level weight-lifters. 8 freestyle wrestlers and 10 controls (all male) participated in the study. Muscle CSA was significantly larger in wrestlers than in weight-lifters or controls (P
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Neck Semispinalis Capitis muscle size in sitting and prone positions measured by real-time ultrasonography
Clinical Rehabilitation, 1998Co-Authors: Asghar Rezasoltani, Mauri Kallinen, Esko Mälkiä, Veikko VihkoAbstract:Objective: To examine the reliability of measurements of Semispinalis Capitis muscle (SECM) cross-sectional area (CSA) in prone and sitting positions, and to compare the muscle size in these two positions.Design: Semispinalis Capitis CSA was measured twice a day on two successive days with a real-time ultrasound apparatus.Subjects: Eighteen males (aged 19–34 years) and 28 females (aged 19–34 years) were studied for the reliability test. Seven males and 12 females were randomly selected to compare SECM size in sitting and prone positions.Results: The intraclass correlation coefficient (ICC) for repeatability measurements was r = 0.98 for the two positions. The correlation of the CSA in sitting and in prone positions was r = 0.93 (p
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neck Semispinalis Capitis muscle size in sitting and prone positions measured by real time ultrasonography
Clinical Rehabilitation, 1998Co-Authors: Asghar Rezasoltani, Mauri Kallinen, Esko Mälkiä, Veikko VihkoAbstract:Objective: To examine the reliability of measurements of Semispinalis Capitis muscle (SECM) cross-sectional area (CSA) in prone and sitting positions, and to compare the muscle size in these two positions.Design: Semispinalis Capitis CSA was measured twice a day on two successive days with a real-time ultrasound apparatus.Subjects: Eighteen males (aged 19–34 years) and 28 females (aged 19–34 years) were studied for the reliability test. Seven males and 12 females were randomly selected to compare SECM size in sitting and prone positions.Results: The intraclass correlation coefficient (ICC) for repeatability measurements was r = 0.98 for the two positions. The correlation of the CSA in sitting and in prone positions was r = 0.93 (p <0.01). There were no significant differences between CSA, linear dimensions and shape ratio of SECM in the two positions.Conclusions: In this study SECM ultrasonography appeared to be an accurate method in both positions, and position as such had no significant effects on the S...
Esko Mälkiä - One of the best experts on this subject based on the ideXlab platform.
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Neck muscle ultrasonography of male weight-lifters, wrestlers and controls.
Scandinavian Journal of Medicine & Science in Sports, 2007Co-Authors: Asghar Rezasoltani, Esko Mälkiä, Veikko VihkoAbstract:The purpose of this cross-sectional study was to evaluate the effect of different sport training regimens on the size of the neck Semispinalis Capitis muscle (SECM). The cross-sectional area (CSA) and the linear dimensions of the SECM were measured bilaterally by real-time ultrasonography. Ten young Finnish elite level weight-lifters. 8 freestyle wrestlers and 10 controls (all male) participated in the study. Muscle CSA was significantly larger in wrestlers than in weight-lifters or controls (P
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Neck Semispinalis Capitis muscle size in sitting and prone positions measured by real-time ultrasonography
Clinical Rehabilitation, 1998Co-Authors: Asghar Rezasoltani, Mauri Kallinen, Esko Mälkiä, Veikko VihkoAbstract:Objective: To examine the reliability of measurements of Semispinalis Capitis muscle (SECM) cross-sectional area (CSA) in prone and sitting positions, and to compare the muscle size in these two positions.Design: Semispinalis Capitis CSA was measured twice a day on two successive days with a real-time ultrasound apparatus.Subjects: Eighteen males (aged 19–34 years) and 28 females (aged 19–34 years) were studied for the reliability test. Seven males and 12 females were randomly selected to compare SECM size in sitting and prone positions.Results: The intraclass correlation coefficient (ICC) for repeatability measurements was r = 0.98 for the two positions. The correlation of the CSA in sitting and in prone positions was r = 0.93 (p
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neck Semispinalis Capitis muscle size in sitting and prone positions measured by real time ultrasonography
Clinical Rehabilitation, 1998Co-Authors: Asghar Rezasoltani, Mauri Kallinen, Esko Mälkiä, Veikko VihkoAbstract:Objective: To examine the reliability of measurements of Semispinalis Capitis muscle (SECM) cross-sectional area (CSA) in prone and sitting positions, and to compare the muscle size in these two positions.Design: Semispinalis Capitis CSA was measured twice a day on two successive days with a real-time ultrasound apparatus.Subjects: Eighteen males (aged 19–34 years) and 28 females (aged 19–34 years) were studied for the reliability test. Seven males and 12 females were randomly selected to compare SECM size in sitting and prone positions.Results: The intraclass correlation coefficient (ICC) for repeatability measurements was r = 0.98 for the two positions. The correlation of the CSA in sitting and in prone positions was r = 0.93 (p <0.01). There were no significant differences between CSA, linear dimensions and shape ratio of SECM in the two positions.Conclusions: In this study SECM ultrasonography appeared to be an accurate method in both positions, and position as such had no significant effects on the S...
Gunter P Siegmund - One of the best experts on this subject based on the ideXlab platform.
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Neck Muscle and Head/Neck Kinematic Responses While Bracing Against the Steering Wheel During Front and Rear Impacts
Annals of Biomedical Engineering, 2020Co-Authors: Jason B. Fice, Karin Brolin, Jean-sébastien Blouin, Daniel W. H. Mang, Jóna M. Ólafsdóttir, Peter A. Cripton, Gunter P SiegmundAbstract:Drivers often react to an impending collision by bracing against the steering wheel. The goal of the present study was to quantify the effect of bracing on neck muscle activity and head/torso kinematics during low-speed front and rear impacts. Eleven seated subjects (3F, 8 M) experienced multiple sled impacts (Δ v = 0.77 m/s; a _peak = 19.9 m/s^2, Δ t = 65.5 ms) with their hands on the steering wheel in two conditions: relaxed and braced against the steering wheel. Electromyographic activity in eight neck muscles (sternohyoid, sternocleidomastoid, splenius Capitis, Semispinalis Capitis, Semispinalis cervicis, multifidus, levator scapulae, and trapezius) was recorded unilaterally with indwelling electrodes and normalized by maximum voluntary contraction (MVC) levels. Head and torso kinematics (linear acceleration, angular velocity, angular rotation, and retraction) were measured with sensors and motion tracking. Muscle and kinematic variables were compared between the relaxed and braced conditions using linear mixed models. We found that pre-impact bracing generated only small increases in the pre-impact muscle activity (
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Dynamic spatial tuning of cervical muscle reflexes to multidirectional seated perturbations.
Spine, 2015Co-Authors: Jóna Marín Ólafsdóttir, Karin Brolin, Jean-sébastien Blouin, Gunter P SiegmundAbstract:Human volunteers were exposed experimentally to multidirectional seated perturbations. To determine the activation patterns, spatial distribution and preferred directions of reflexively activated cervical muscles for human model development and validation. Models of the human head and neck are used to predict occupant kinematics and injuries in motor vehicle collisions. Because of a dearth of relevant experimental data, few models use activation schemes based on in vivo recordings of muscle activation and instead assume uniform activation levels for all muscles within presumed agonist or antagonist groups. Data recorded from individual cervical muscles are needed to validate or refute this assumption. Eight subjects (6 males, 2 females) were exposed to seated perturbations in 8 directions. Electromyography was measured with wire electrodes inserted into the sternocleidomastoid, trapezius, levator scapulae, splenius Capitis, Semispinalis Capitis, Semispinalis cervicis, and multifidus muscles. Surface electrodes were used to measure sternohyoid activity. Muscle activity evoked by the perturbations was normalized with recordings from maximum voluntary contractions. The multidirectional perturbations produced activation patterns that varied with direction within and between muscles. Sternocleidomastoid and sternohyoid activated similarly in forward and forward oblique directions. The Semispinalis Capitis, Semispinalis cervicis, and multifidus exhibited similar spatial patterns and preferred directions, but varied in activation levels. Levator scapulae and trapezius activity generally remained low, and splenius Capitis activity varied widely between subjects. All muscles showed muscle- and direction-specific contraction levels. Models should implement muscle- and direction-specific activation schemes during simulations of the head and neck responses to omnidirectional horizontal perturbations where muscle forces influence kinematics, such as during emergency maneuvers and low-severity crashes. N/A.
Mauri Kallinen - One of the best experts on this subject based on the ideXlab platform.
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Neck Semispinalis Capitis muscle size in sitting and prone positions measured by real-time ultrasonography
Clinical Rehabilitation, 1998Co-Authors: Asghar Rezasoltani, Mauri Kallinen, Esko Mälkiä, Veikko VihkoAbstract:Objective: To examine the reliability of measurements of Semispinalis Capitis muscle (SECM) cross-sectional area (CSA) in prone and sitting positions, and to compare the muscle size in these two positions.Design: Semispinalis Capitis CSA was measured twice a day on two successive days with a real-time ultrasound apparatus.Subjects: Eighteen males (aged 19–34 years) and 28 females (aged 19–34 years) were studied for the reliability test. Seven males and 12 females were randomly selected to compare SECM size in sitting and prone positions.Results: The intraclass correlation coefficient (ICC) for repeatability measurements was r = 0.98 for the two positions. The correlation of the CSA in sitting and in prone positions was r = 0.93 (p
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neck Semispinalis Capitis muscle size in sitting and prone positions measured by real time ultrasonography
Clinical Rehabilitation, 1998Co-Authors: Asghar Rezasoltani, Mauri Kallinen, Esko Mälkiä, Veikko VihkoAbstract:Objective: To examine the reliability of measurements of Semispinalis Capitis muscle (SECM) cross-sectional area (CSA) in prone and sitting positions, and to compare the muscle size in these two positions.Design: Semispinalis Capitis CSA was measured twice a day on two successive days with a real-time ultrasound apparatus.Subjects: Eighteen males (aged 19–34 years) and 28 females (aged 19–34 years) were studied for the reliability test. Seven males and 12 females were randomly selected to compare SECM size in sitting and prone positions.Results: The intraclass correlation coefficient (ICC) for repeatability measurements was r = 0.98 for the two positions. The correlation of the CSA in sitting and in prone positions was r = 0.93 (p <0.01). There were no significant differences between CSA, linear dimensions and shape ratio of SECM in the two positions.Conclusions: In this study SECM ultrasonography appeared to be an accurate method in both positions, and position as such had no significant effects on the S...
