The Acute Effect of Accentuated Eccentric Overloading upon the Kinematics and Myoelectric Activity in the Eccentric and Concentric Phase of a Traditional Bench Press

The target of this study was to investigate the acute effect of a supramaximal augmented eccentric load on the kinematics and myoelectric activity during the concentric phase of the lift in a traditional bench press. Ten resistance-trained males (age 24 ± 6.4 years, height 1.80 ± 0.07 m, body-mass 87.2 ± 16.9 kg) performed two repetitions at 110/85% of the 1-RM in the dynamic accentuated external resistance (DAER) group and two repetitions at 85/85% of the 1-RM for the control group in a traditional bench press. The barbell kinematics, joint kinematics and myoelectric activity of eight muscles were measured in the eccentric phase and the pre-sticking, sticking and post-sticking regions. The main findings were that the sticking region started at a lower barbell height and that a lower barbell velocity was observed in the sticking region during the second repetition in the DAER condition compared to the control condition. Additionally, the lateral deltoid muscle and clavicle part of the pectoralis were more active during the eccentric loading compared to the control condition for the second repetition. Furthermore, higher myoelectric activity was measured during the second repetition in the sticking region for the eccentric loading condition in both pectoralis muscles, while the sternal parts of the pectoralis and anterior deltoid were more active during the second repetition of the control condition in the post-sticking region. Based on our findings, it can be concluded that the supramaximal loading in the descending phase with 110% of the 1-RM in the bench press does not have an acute and positive effect of enhanced performance in the ascending phase of the lift at 85% of 1-RM. Instead, fatigue occurs when using this eccentric load during a bench press.

Ginkgo leaf sign on X-ray chest due to subcutaneous emphysema in a COVID-19 patient

Subcutaneous emphysema (SE) is usually encountered in cases of structural lung diseases and secondary to direct trauma or iatrogenic procedures for airway access. It is mostly associated with pneumothorax. The diagnosis is made clinically by palpation of the affected area and radiology. Here we presented a case of COVID-19 pneumonia presenting with extensive subcutaneous emphysema resulting in airway compression which was a very rare manifestation of COVID-19 infection. The COVID-19 infection led to extensive alveolar damage to the lungs and the chronic cough which may have led to this complication due to sudden change of pressure differences in the chest wall cavity. The limitation of using of personal protective equipments hindered the diagnosis of this condition as auscultation and the palpatory feelings were greatly hindered. The chest X-ray shows air in subcutaneous space and the prominence of the fibres of bilateral pectoralis muscles which gives an impression of the venous system of a Ginkgo leaf, so named as Ginkgo leaf sign.

Poland’s syndrome mimicking traumatic chest injury

Poland’s syndrome (PS) is a rare developmental anomaly that can manifest mild (pectoralis muscles involvement) to severe deformities (rib hypoplasia and hand deformities). We report a case of 69-year-old man who presented to the emergency department with a traumatic chest injury after a fall. It was initially thought to have a significant chest injury as the trauma survey revealed a palpable defect and tenderness in the right anterior chest wall. There was also a symbrachydactyly deformity in the right hand. CT of the chest showed lack of right pectoralis muscles, which were consistent with PS. This case highlights the importance of gathering detail history in adult trauma patients such as congenital disorder especially in the presence of bony deformity. With possibilities of several traumatic conditions in trauma patients eliminated, one can expand the non-traumatic differential, keeping in mind the possibility of a congenital disorder that can mimic traumatic chest injury.

TẠO HÌNH XƯƠNG ỨC VÀ THÀNH NGỰC BẰNG NẸP VÍT TRONG VẾT THƯƠNG NGỰC XUYÊN

chest wall was destroyed in the penetrating chest wound is dificult problems for a variety of conditions and has been a complex problem in the past due to intraoperative technical difficulties, surgical complications, and respiratory failure. The surgical technique of chest wall stabilization for fail chest and reconstruction with a screws plate as a part of destroyed chest wall and reconstruction is described here in this article.Cas reporte A 54-year-old male was shot in the left thorax , fired from a AK bullet at close range (plus than 3 m). He arrived to our hopital approximately 8 hours after the injury. He had absent breath sounds on the left side, rapid respiratory rate 35 L/P,upper anterior fail chets(paradoxical motion of segments of the chest wall) and his vital signs were stable (pulse was 130, blood pressure was 140/90 mmHg. Physical examination revealed a single skin laceration (plus than 2. cm) with less surrounding contusion at the left anterier-axillary line; 3th intercostal space. The admission chest radiograph revealed a all left hemothorax(pleural effusion). chest X-ray demonstrated a foreign body at the right clavicle bone with the form of an bulett (Figure 1). A leftsided thoracostomy tube drained blood, the patient underwent a traumatic thoracotomie.the bullet and ribs,1/2 anterior upper sternum, muscles on the destroyed anterior upper chest wall were removed.wide anterior chest wall defects on only shaped by steel wires and screws plate and grand pectoralis muscles to the chest wall fix (stabilisation), avoid reversal respiratory and mediastinal infection.. The patient had an uneventful hospital stay and was discharged home 25 days later.

Effects of Self-Myofascial Release on Shoulder Function and Perception in Adolescent Tennis Players

Context: Tennis induces a decreased internal rotation range of motion at the dominant glenohumeral joint. The effects of self-myofascial release have not yet been investigated to restore glenohumeral range of motion. Objective: This study aimed at investigating the effects of self-myofascial release on shoulder function and perception in adolescent tennis players. Design: Test–retest design. Setting: Tennis training sport facilities. Participants: Eleven male players participated in this study (age: 15 [3] y; height: 173.1 [11.1] cm; mass: 56.0 [15.1] kg; International Tennis Number: 3). Intervention: During 5 weeks, the players performed their regular tennis training. During 5 additional weeks, self-myofascial release of the infraspinatus and pectoralis muscles was implemented 3 times per week after the warm-up of the regular training session. Main Outcome Measures: The primary outcome was glenohumeral internal rotation range of motion. The secondary outcomes were perceived shoulder instability and tennis serve accuracy and velocity. Results: Adding self-myofascial release allowed an increase of 11° (2°) of internal rotation range of motion at the dominant glenohumeral joint (P < .001) and a decreased perception of shoulder instability (P = .03), while maintaining tennis serve velocity and accuracy. Conclusions: Implementing self-myofascial release on infraspinatus and pectoralis muscles 3 times per week during 5 weeks improved dominant glenohumeral internal rotation range of motion in tennis players. It can be used as a strategy to preserve the mobility of this joint.

Complete Bilateral Brachial Plexus Injury from Rhabdomyolysis and Compartment Syndrome: Surgical Case Report

BACKGROUND AND IMPORTANCE Acute bilateral brachial plexus injury is rare and usually a result of traction injury. Immediate operative intervention is reserved for rare cases of ongoing compression of the plexus; the role for acute decompression of the brachial plexus secondary to compartment syndrome has not been previously described. In this report, we describe the technique and role for urgent brachial plexus decompression. CLINICAL PRESENTATION A 32-yr-old man presented with acute complete bilateral brachial plexus palsy due to focal rhabdomyolysis and brachial plexus compression after a night of excess alcohol and methadone ingestion. He had complete loss of motor and sensory function from C5 to T1, with the exception of partial sensory sparing of the C5 dermatome. Magnetic resonance imaging demonstrated diffuse muscular edema of the supraclavicular and infraclavicular fossae in addition to the pectoralis muscles and the deltoids bilaterally. He underwent urgent surgical decompression of his supraclavicular and infraclavicular fossae with fasciotomies of the pectoral muscles and the anterior deltoids, allowing direct visualization and decompression of the entire brachial plexus resulting in a near-complete functional recovery. CONCLUSION Neurosurgeons should include brachial plexus compression due to compartment syndrome in the differential diagnosis of patients with acute upper extremity weakness, particularly when associated with prolonged immobilization and/or substance abuse. Prompt surgical decompression should be performed in these patients if imaging and laboratory data suggest compartment syndrome and resultant neurological deficit.

FUNCTIONAL TESTING OF THE MUSCLES IN THE HYGIENIC EVALUATION OF THE PREVENTIVE EFFICACY OF PHYSICAL EDUCATION IN PRIMARY SCHOOL

The possibility of using the results of functional muscle testing in the evaluation of the preventive efficacy of the physical education of children in primary school is discussed. The results of the evaluation of the functional state of the pectoral muscles and muscles of the shoulder girdle, muscles of the pelvis and lower extremities in 59 first grade pupils in the dynamics of 2 years of the learning of the physical education differentiated according to the gender (the grade of girls and the grade of boys). The elective part of the educational program of physical education consisted of separate units focused on the development of mainly flexibility and coordination in girls, strength, and endurance - in boys. It is established that most often the decreasing of muscles elasticity was characteristic of pectoralis muscles and shoulder girdle muscles compared to the muscles of the pelvis and lower extremities. Peculiarities of the distribution of the enslavement of muscles and the dynamics of their functional state in children of different genders in the learning process are established. The conclusion about the expediency of functional muscle testing for hygienic evaluation of the preventive efficacy of physical education in primary school was made.