scholarly journals Can the Weight of an External Breast Prosthesis Influence Trunk Biomechanics during Functional Movement in Postmastectomy Women?

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Katarzyna Hojan ◽  
Faustyna Manikowska
Keyword(s):  
Body Movement ◽  
Erector Spinae ◽  
Lumbar Region ◽  
Functional Movement ◽  
Trunk Motion ◽  
Breast Prosthesis ◽  
Forward Bending ◽  
Trunk Biomechanics ◽  
Underlying Mechanisms ◽  
Two Sides

Introduction. Recent papers indicate that one-side mastectomy can produce deleterious effects on the posture and musculoskeletal system. This study was conducted to better understand the underlying mechanisms involved in trunk motion in external prosthesis users.Objective. The aim was to evaluate the changes in surface electromyographic (SEMG) activity of the erector spinae muscles (ES) in postmastectomy women with and without breast prostheses during functional body movement tests.Methods. In 51 one-side postmastectomy women the SEMG muscle activity of bilateral ES was measured during symmetrical and asymmetrical dynamic activities in a counterbalanced manner with different weights of the breast prosthesis. Range-of-motion measurements were taken for forward bending, backward bending, lateral bending, and rotation.Results. The mean level of the ES activity in the lumbar region was not affected by the weight of the external breast prosthesis during most of the functional body tests (P>0.05). The activity of ES during functional body tests with and without different external breast prostheses did not differ between the two sides of the trunk (mastectomy and nonmastectomy) for most of the movement tests (P>0.05).Conclusion. The lumbar ES activity during functional tests is not associated with the weight of the external breast prosthesis in postmastectomy women.

scholarly journals Comparison of Flexion Relaxation Phenomenon Between Female Yogis and Matched Non- Athlete Group

2021 ◽  
Author(s):  
Marzyeh Ramezani ◽  
Amin Kordi Yoosefinejad ◽  
Alireza Motealleh ◽  
Mohsen Ghofrani-Jahromi
Keyword(s):  
Erector Spinae ◽  
Relaxation Phenomenon ◽  
Control Group ◽  
Trunk Flexion ◽  
Lumbar Flexion ◽  
Trunk Inclination ◽  
Forward Bending ◽  
Flexion Relaxation Phenomenon ◽  
Flexion Relaxation ◽  
Yoga Practitioners

Abstract Background: Trunk flexion is a common exercise during daily activities. Flexion relaxation phenomenon (FRP) occurs during forward bending in which there is a sudden silence of erector spinae (ES) muscles. The pattern of forward bending differs in yoga practitioners. This learned pattern probably predisposes yogis to injuries.The hypothesis of this study was that FRP differs in yogis in comparison to non-yogis individuals.Methods: This observational cross-sectional study was performed on 60 women assigned into yogis and non-athlete groups. Each participant was asked to bend forward and then return to the initial position. ES activity was recorded at L3 level, 4 cm from mid line during the trial. Trunk inclination and lumbar flexion angles were calculated at FRP onset and cessation moments. Results: The FRP phenomenon occurred in 80% of yoga practitioners in comparison to 96.7% in the control group. Trunk inclination angle was significantly greater at FRP initiation in yogis compared to control group. Lumbar flexion angle was not different between the groups. Conclusions: It is concluded that the altered pattern of forward bending observed in yogis may change patterns of ES muscles activity if it becomes part of a person's daily lifestyle which might predispose these muscles to fatigue and subsequent injuries.

Accuracy of Functional Movement Screen Deep Squat Scoring and the Influence of Optimized Scoring Criteria: A 3-Dimensional Kinematic Approach

2021 ◽  
Vol 30 (1) ◽  
pp. 55-61
Author(s):  
Eric P. Scibek ◽  
Matthew F. Moran ◽  
Susan L. Edmond
Keyword(s):  
Physical Therapist ◽  
Body Movement ◽  
Intraclass Correlation ◽  
Athletic Trainer ◽  
Functional Movement Screen ◽  
Exercise Science ◽  
Cross Sectional ◽  
Functional Movement ◽  
Deep Squat ◽  
Science Professional

Context: The deep squat (DS) test is a component of the functional movement screen, which is used to assess the quality of fundamental movement patterns; however, the accuracy of the DS has not been studied. The DS is a complex, total body movement pattern with evaluation required at several points along the kinematic chain. Objective: To assess the accuracy of DS scoring by an athletic trainer, physical therapist, and exercise science professional via a comparative analysis with kinematic data (KD) and to identify scoring criteria that would improve agreement between raters and KD scores. Design: Cross-sectional study. Setting: Motion analysis laboratory. Participants: A rater from each of 3 movement science disciplines rated the DS of 23 male college athletes (20.3 [1.2] y; 70.5 [3.5] kg). Interventions: Subjects were outfitted with reflective markers and asked to perform the DS. The DS performance was scored by 3 raters and kinematic analysis. Subsequently, the optimal set of criteria that minimized the difference between mode rater score and KD was determined via a Nelder–Mead simplex optimization routine. Main Outcome Measures: Intraclass correlation coefficients (ICCs) were calculated using SPSS (version 23; IBM, Armonk, NY) to determine tester agreement with the KD score and between the mode score and KD score. Results: Agreement was poor for the athletic trainer (ICC = .387), physical therapist (ICC = .298), exercise science professional (ICC = .378), and raters’ DS scores when compared with the KD. Agreement was poor for the mode score when compared with KD prior to optimization and good following optimization (ICC = .830), thereby allowing identification of specific scoring errors. Conclusions: Agreement for DS scores is poor when compared with KD; however, it may be improved with optimization of DS scoring criteria.

scholarly journals Altered erector spinae activity and trunk motion occurs with moderate and severe unilateral hip OA

2018 ◽  
Vol 36 (7) ◽  
pp. 1826-1832 ◽  
Author(s):  
Janice Moreside ◽  
Ivan Wong ◽  
Derek Rutherford
Keyword(s):  
Erector Spinae ◽  
Trunk Motion

Fatigue-Induced Changes in Movement Pattern and Muscle Activity During Ballet Releve on Demi-Pointe

2016 ◽  
Vol 32 (4) ◽  
pp. 350-358 ◽  
Author(s):  
Cheng-Feng Lin ◽  
Wan-Chin Lee ◽  
Yi-An Chen ◽  
Bih-Jen Hsue
Keyword(s):  
Body Movement ◽  
Center Of Mass ◽  
Movement Control ◽  
Lower Extremities ◽  
Movement Pattern ◽  
Whole Body ◽  
Ballet Dancers ◽  
Ankle Motion ◽  
Trunk Motion ◽  
Before And After

Fatigue in ballet dancers may lead to injury, particularly in the lower extremities. However, few studies have investigated the effects of fatigue on ballet dancers’ performance and movement patterns. Thus, the current study examines the effect of fatigue on the balance, movement pattern, and muscle activities of the lower extremities in ballet dancers. Twenty healthy, female ballet dancers performed releve on demi-pointe before and after fatigue. The trajectory of the whole body movement and the muscle activities of the major lower extremity muscles were recorded continuously during task performance. The results show that fatigue increases the medial-lateral center of mass (COM) displacement and hip and trunk motion, but decreases the COM velocity and ankle motion. Moreover, fatigue reduces the activities of the hamstrings and tibialis anterior, but increases that of the soleus. Finally, greater proximal hip and trunk motions are applied to compensate for the effects of fatigue, leading to a greater COM movement. Overall, the present findings show that fatigue results in impaired movement control and may therefore increase the risk of dance injury.

Study of efficacy of ultrasonography guided erector spinae plane block for abdominothoracic surgeries

2021 ◽  
Vol 19 (3) ◽  
pp. 100-104
Author(s):  
Amol B Sasane ◽  
Keyword(s):  
Blood Pressure ◽  
Postoperative Analgesia ◽  
Analgesic Efficacy ◽  
Erector Spinae ◽  
Lumbar Region ◽  
Ultrasound Guided ◽  
Erector Spinae Plane Block ◽  
Score Difference ◽  
Group 2 ◽  
Group 1

Background: Erector spinae block (ESPB) provides analgesia by targeting the dorsal and ventral rami of the spinal nerves,performed in the lumbar region for postoperative analgesia of abdomino-thoracic surgeries. This study was aimed to assess the efficacy of Erector spinae block (ESPB) on postoperative analgesia in patients undergoing abdominothoracic surgeries under general anesthesia. Material and Methods: Present study was prospective, randomized, comparative study, conducted in patients with 18-70 years age, ASA grade- I/II, posted for abdominothoracic surgeries, Mallampatti scores - I and II, consented for participation. 120 patients were randomly assigned into two groups of 60 each, to either Erector spine block group (Group 1) or conventional pain killers (Group 2). Results: General characteristics such as age, height, weight, BMI were comparable in both groups and difference was not statistically significant. The postoperative systolic blood pressure, diastolic blood pressure, heart rate and Mean post-operative VAS score difference was statistically significant, from 30 minutes post-operative to 480 mins (8 hours). Group 1 have significantly less amount opioid requirement as none of the patients required inj tramadol more than 100 mg and only 5 (8.33%) cases required 100 mg whereas in the Group 2 73.33% required inj tramadol more than 100 mg and 8.55% required 175 mg. Group 1 have significantly long period of opioid free time as during first 2 hours none of the patients required inj tramadol whereas in the Group 2 83.33% required inj tramadol in the first 2 hours. Conclusion: In our study we concluded that the analgesic efficacy of Ultrasound guided Erector spinae block is an effective procedure over systemic analgesics and provide better patient satisfaction and compliance

scholarly journals Relationship of the skin and subcutaneous tissue thickness in the tensiomyography response: a novel ultrasound observational study

2018 ◽  
Vol 64 (6) ◽  
pp. 549-553 ◽  
Author(s):  
César Calvo-Lobo ◽  
Ignacio Díez-Vega ◽  
Mónica García-Mateos ◽  
Juan José Molina-Martín ◽  
Germán Díaz-Ureña ◽  
...  
Keyword(s):  
Subcutaneous Tissue ◽  
Contractile Properties ◽  
Erector Spinae ◽  
Skin Thickness ◽  
Lumbar Region ◽  
Superficial Fascia ◽  
Tissue Thickness ◽  
Strong Negative Correlation ◽  
Parametric Data ◽  
The Right

SUMMARY BACKGROUND: The aim of the study was to describe and correlate the skin, subcutaneous tissue, and superficial fascia thickness assessed by ultrasonography (US) with the lumbar erector spinae muscles contractile properties evaluated by tensiomyography (TMG). METHODS: A cross-sectional descriptive study with 50 healthy participants was performed. The point of maximum lordosis in the lumbar region of the right erector spinae was evaluated by US and TMG. First, the skin, subcutaneous tissue, and superficial fascia thicknesses (cm) were assessed by US. Second, the five contractile TMG parameters were analyzed from the right erector spinae muscles belly displacement-time curves: maximal radial displacement (Dm), contraction time (Tc), sustain time (Ts), delay time (Td), and half-relaxation time (Tr). Finally, correlation analyses using Pearson (r for parametric data) and Spearman (rs for non-parametric data) coefficients were performed. RESULTS: A strong negative correlation was shown between Dm and subcutaneous tissue thickness (rs=-0.668; P<.001). Furthermore, moderate negative correlations were observed between Dm and skin thickness (r=-0.329; P=0.020) as well as Tr and subcutaneous tissue thickness (rs=-0.369; P=0.008). The rest of the parameters did not show statistically significant correlations (P >.05). CONCLUSION: Therefore, the lumbar erector spinae contractile properties during TMG assessments, especially Dm and Tr, may be widely correlated by the skin and subcutaneous tissue thickness.

scholarly journals Association between lumbopelvic motion and muscle activation in patients with non-specific low back pain during forward bending task: A cross-sectional study

2019 ◽  
Vol 40 (01) ◽  
pp. 29-37
Author(s):  
Peemongkon Wattananon ◽  
Komsak Sinsurin ◽  
Sirikarn Somprasong
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Muscle Activity ◽  
Muscle Activation ◽  
Erector Spinae ◽  
Low Back ◽  
Activation Patterns ◽  
Muscle Activation Patterns ◽  
Forward Bending ◽  
Lumbar Motion

Background: Evidence suggests patients with non-specific low back pain (NSLBP) have altered lumbar and pelvic movement patterns. These changes could be associated with altered patterns of muscle activation. Objective: The study aimed to determine: (1) differences in the relative contributions and velocity of lumbar and pelvic movements between people with and without NSLBP, (2) the differences in lumbopelvic muscle activation patterns between people with and without NSLBP, and (3) the association between lumbar and pelvic movements and lumbopelvic muscle activation patterns. Methods: Subjects (8 healthy individuals and 8 patients with NSLBP) performed 2 sets of 3 repetitions of active forward bending, while motion and muscle activity data were collected simultaneously. Data derived were lumbar and pelvic ranges of motion and velocity, and ipsilateral and contralateral lumbopelvic muscle activities (internal oblique[Formula: see text]transverse abdominis (IO[Formula: see text]TA), lumbar multifidus (LM), erector spinae (ES) and gluteus maximus (GM) muscles). Results: Lumbar and pelvic motions showed trends, but exceeded 95% confidence minimal detectable difference (MDD[Formula: see text]), for greater pelvic motion [Formula: see text], less lumbar motion [Formula: see text] among patients with NSLBP. Significantly less activity was observed in the GM muscles bilaterally [Formula: see text] in the NSLBP group. A significant association [Formula: see text], [Formula: see text] was found between ipsilateral ES muscle activity and lumbar motion, while moderate, but statistically non-significant associations, were found between GM muscle activity bilaterally and lumbar velocity [Formula: see text]ipsilateral: [Formula: see text], [Formula: see text]; contralateral: [Formula: see text], [Formula: see text] in the NSLBP group. Conclusion: Findings indicated patients had greater pelvic contribution, but less lumbar contribution which was associated with less activation of the GM bilaterally.

scholarly journals DI-5-Cuffs: Lumbar Intervertebral Disc Proteoglycan and Water Content Changes in Humans after Five Days of Dry Immersion to Simulate Microgravity

2020 ◽  
Vol 21 (11) ◽  
pp. 3748
Author(s):  
Loïc Treffel ◽  
Nastassia Navasiolava ◽  
Karen Mkhitaryan ◽  
Emmanuelle Jouan ◽  
Kathryn Zuj ◽  
...  
Keyword(s):  
Intervertebral Disc ◽  
Water Content ◽  
T2 Mapping ◽  
Lumbar Region ◽  
Gravitational Unloading ◽  
Lumbar Intervertebral Disc ◽  
Dry Immersion ◽  
Disc Herniations ◽  
Proteoglycan Content ◽  
Underlying Mechanisms

Most astronauts experience back pain after spaceflight, primarily located in the lumbar region. Intervertebral disc herniations have been observed after real and simulated microgravity. Spinal deconditioning after exposure to microgravity has been described, but the underlying mechanisms are not well understood. The dry immersion (DI) model of microgravity was used with eighteen male volunteers. Half of the participants wore thigh cuffs as a potential countermeasure. The spinal changes and intervertebral disc (IVD) content changes were investigated using magnetic resonance imaging (MRI) analyses with T1-T2 mapping sequences. IVD water content was estimated by the apparent diffusion coefficient (ADC), with proteoglycan content measured using MRI T1-mapping sequences centered in the nucleus pulposus. The use of thigh cuffs had no effect on any of the spinal variables measured. There was significant spinal lengthening for all of the subjects. The ADC and IVD proteoglycan content both increased significantly with DI (7.34 ± 2.23% and 10.09 ± 1.39%, respectively; mean ± standard deviation), p < 0.05). The ADC changes suggest dynamic and rapid water diffusion inside IVDs, linked to gravitational unloading. Further investigation is needed to determine whether similar changes occur in the cervical IVDs. A better understanding of the mechanisms involved in spinal deconditioning with spaceflight would assist in the development of alternative countermeasures to prevent IVD herniation.

Biomechanics of Trunk During Walking Carrying Load on One Hand Using Nonlinear Methods

2014 ◽  
Author(s):  
Vikas Yadav ◽  
Maruti Ram Gudavalli ◽  
P. K. Raju ◽  
Dan Marghitu
Keyword(s):  
Correlation Dimension ◽  
Reaction Force ◽  
Force Plate ◽  
Approximate Entropy ◽  
Peak Force ◽  
Erector Spinae ◽  
Trunk Muscles ◽  
Emg Activity ◽  
Median Frequency ◽  
Trunk Motion

Activities of daily living include carrying objects using one hand. Carrying a load using one hand can alter the loading on the musculoskeletal system as well as the walking pattern. The objective of this pilot study was to quantify the ground reaction forces, electromyographic (EMG) activity of trunk muscles, and trunk motion during walking. Nine human volunteers with no symptoms of pain were recruited from the student and employee population of an academic institution. Data were recorded from 8 volunteer subjects. Participants were asked to walk at self-selected speed back and forth at their comfortable speed carrying loads varying from 0 to 25 pounds on right hand on a wooden walking platform for 30 steps/cycles. Motion data were recorded from T1, L1, L3, and S1 vertebrae at a sampling frequency of 120 Hz. Range of Motion (ROM), Correlation Dimension (CoD), and Approximate Entropy (ApEn) was computed using custom written MatLab programs. EMG data were recorded from six muscle groups bilaterally (right and left): Erector Spinae, Multifidus, Latissimus Dorsi, Internal Obliques, External Obliques and Rectus Abdominis at a frequency of 1200 Hz. Root mean square EMG values, Mean and Median Frequency of the EMG data were calculated to observe the effect of increasing load on muscle fatigue using custom developed MatLab program. Ground reaction force (GRF) data were collected using a force plate and the associated 1st peak force (Fz1), 2nd Peak force (Fz3) and minimum force (Fz2) between the two peak forces were calculated during gait cycle. The ROM values had a range from 2.6–3.2 deg. for Lumbar lateral bending (LB), 6.7–8.7 deg. for Thoracic LB. Approximate Entropy (ApEn) values ranged from 0.20–0.40 for Lumbar LB motion and 0.30–0.50 for Thoracic LB motion. Correlation Dimension (CoD) values ranged from 1.20–1.40 for lumbar LB and 1.20–1.30 for Thoracic LB. Normalized GRF increased during walking with increased load. Significance difference (P<0.05) were found for vGRF with increase in load. Motion and EMG data did not reveal any significant differences.

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