scholarly journals EMG Analysis of Dominant and Non-Dominant Arm of Latissimus Dorsi Muscles in Bowlers of Karad, Maharashtra, India

2021 ◽  
Vol 10 (36) ◽  
pp. 3088-3093
Author(s):  
Pradip Raghunath Lad ◽  
Dhairysheel Sanjay Patil ◽  
Smita Chandrakant Patil ◽  
Khushboo Trishant Chotai
Keyword(s):  
Latissimus Dorsi ◽  
Surface Emg ◽  
Latissimus Dorsi Muscle ◽  
Wilcoxon Test ◽  
Peak Amplitude ◽  
Emg Activity ◽  
Cross Sectional ◽  
Dorsi Muscle ◽  
Muscular Structure ◽  
Emg Electrodes

BACKGROUND Latissimus dorsi plays an important role in bowlers. Different bowling techniques recruit latissimus dorsi at different phases of bowling. This causes the muscle to undergo excessive contraction than its limit. Despite widespread knowledge about the recruitment of latissimus dorsi in bowling, there is limited electromyographic (EMG) studies about latissimus dorsi. It is necessary to evaluate and document the recruitment of latissimus dorsi in dominant and non-dominant arm in bowlers, which is focused in this study. This study was done to analyse the surface EMG activity of latissimus dorsi muscle in dominant and non-dominant arm during bowling. METHODS A cross-sectional analytical study was carried out among 96 professional cricket bowlers from deluxe cricket club and Yashwanthrao Chavan’s cricket club in Karad. EMG electrodes were applied over the latissimus dorsi muscle and the bowlers were asked to perform the action of bowling. The root mean square (RMS) and mean peak amplitude of the dominant and non-dominant arm were recorded. RESULTS The RMS (12.45 ± 2.84) values and mean peak amplitude (131.77 ± 44.11) of the dominant latissimus dorsi varied significantly from non-dominant muscle (P = 0.0015). Wilcoxon test was utilized for analysis of within group parameters. CONCLUSIONS The result of the present study showed strong evidence to support high recruitment of dominant latissimus dorsi in professional bowlers suggests the changes occurred in the physiological as well as biomechanical muscular structure. KEY WORDS EMG, Dominant, Non-Dominant, Latissimus Dorsi, Fast Bowlers

scholarly journals The effect of posture on the role of pectoralis major and latissimus dorsi muscles in expiration in tetraplegia

1993 ◽  
Vol 49 (2) ◽  
pp. 25-27
Author(s):  
Poobalam Gounden
Keyword(s):  
Latissimus Dorsi ◽  
Pectoralis Major Muscle ◽  
Latissimus Dorsi Muscle ◽  
Pectoralis Major ◽  
Emg Activity ◽  
Electromyographic Activity ◽  
Forced Expiration ◽  
Dorsi Muscle ◽  
Postural Changes

This study was designed to. examine the effect of posture on forced expiration as reflected in phasic electromyographic activity in accessory expiratory muscles in tetraplegic subjects with complete lesions between the fifth and eight cervical segments. In order to determine the effect of posture on the action of the clavicular head of the pectoralis major muscle and the latissimus dorsi muscle during forced expiration, the subjects were studied in two test positions, support sitting and supine lying.Electromyographic examination of the above mentioned muscles in eight tetraplegic subjects showed changes in electrical activity in the clavicular portion of the pectoralis major muscle when the subjects were studied in the supine position. Four out of eight subjects showed evidence of an increase in EMG activity in the supine lying position. When the muscle was tested with the patient in the supported sitting position it failed to demonstrate a significant increase in electromyographic activity during forced expiration.We concluded therefore that the role of the clavicular portion of the pectoralis major muscle during expiration in tetraplegia is posture dependent. These findings have important therapeutic implications: specific training programmes to increase the strength and endurance of this muscle should be conducted with the subject in the correct position. The action of the latissimus dorsi muscle was not significantly influenced by the postural changes during forced expiration.

scholarly journals Myosin Isoforms and Contractile Properties of Single Fibers of Human Latissimus Dorsi Muscle

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Antonio Paoli ◽  
Quirico F. Pacelli ◽  
Pasqua Cancellara ◽  
Luana Toniolo ◽  
Tatiana Moro ◽  
...  
Keyword(s):  
Latissimus Dorsi ◽  
Fiber Type ◽  
Myosin Heavy Chain Isoforms ◽  
Latissimus Dorsi Muscle ◽  
Myosin Isoforms ◽  
Cross Sectional ◽  
Type Distribution ◽  
Dorsi Muscle ◽  
Fiber Type Distribution

The aim of our study was to investigate fiber type distribution and contractile characteristics of Latissimus Dorsi muscle (LDM). Samples were collected from 18 young healthy subjects (9 males and 9 females) through percutaneous fine needle muscle biopsy. The results showed a predominance of fast myosin heavy chain isoforms (MyHC) with 42% of MyHC 2A and 25% of MyHC 2X, while MyHC 1 represented only 33%. The unbalance toward fast isoforms was even greater in males (71%) than in females (64%). Fiber type distribution partially reflected MyHC isoform distribution with 28% type 1/slow fibers and 5% hybrid 1/2A fibers, while fast fibers were divided into 30% type 2A, 31% type A/X, 4% type X, and 2% type 1/2X. Type 1/slow fibers were not only less abundant but also smaller in cross-sectional area than fast fibers. During maximal isometric contraction, type 1/slow fibers developed force and tension significantly lower than the two major groups of fast fibers. In conclusion, the predominance of fast fibers and their greater size and strength compared to slow fibers reveal that LDM is a muscle specialized mainly in phasic and powerful activity. Importantly, such specialization is more pronounced in males than in females.

scholarly journals The Flap Based on the Subscapular Artery: A Cross-sectional Study

2021 ◽  
Vol 1 (3) ◽  
Author(s):  
Lam Van Nguyen ◽  
Thi Van Vo ◽  
Hung Huynh Vinh Ly
Keyword(s):  
Latissimus Dorsi ◽  
Axillary Artery ◽  
Muscle Flap ◽  
Cross Sectional Study ◽  
Latissimus Dorsi Muscle ◽  
Sectional Study ◽  
Serratus Anterior ◽  
Cross Sectional ◽  
Dorsi Muscle ◽  
Scapular Region

Background: The lateral thoracic-lumbar-scapular region is an ideal source to supply flaps. The study towards improving the method of taking flaps towards conserving a part of the muscle needs to clarify the ratio of branching forms of the arteries in the muscle. Objectives: This study was done to describe the typical anatomy, the anatomical and size variations of subscapular and circumflex scapular vessels, the branching and distribution of vascular pedicle supplying latissimus dorsi muscle flap, and serratus anterior muscle flap of circumflex scapular vessels. Methods: We conducted a cross-sectional study on 24 corpses of adults of both genders. The flap vessels were revealed through two stages of surgery, including the axillary region and the lumbar-scapular region. We classified the collected information and recognized typical and transformed forms based on statistical data. Results: The subscapular artery was separated by the axillary artery, the general origin of the circumflex scapular artery, and the thoracodorsal artery. Subscapular vessels were found in 40/42 cases, accounting for 95.2%, and the length and diameter were 3.04 ± 0.51 cm and 2.85 ± 0.46mm, respectively. The circumflex scapular artery, which had originated from the subscapular artery, was found in 40/42 cases. It also showed origin from subscapular artery with 2/42 cases. The length of the circumflex scapular artery was 3.14 ± 0.70 cm, and its diameter was 2.46 ± 0.48 mm. Terminal branches of the circumflex scapular artery were very variable. Almost all branching forms of the artery in the latissimus dorsi muscle were external branches, but they might be present or not in internal and recurrent branches. Conclusions: The vascular pedicle’s distribution, size, and presence were influenced by the subscapular artery supply flaps. Due to the diverse blood supply from the flaps’ vessels, the surgeon can use the flaps based on the subscapular artery in many forms. These flaps could be used as a seamless vascular flap or a free flap in orthopedic surgery.

Free Innervated Latissimus Dorsi Muscle Flap for Bladder Atonia

2006 ◽  
Vol 22 (03) ◽  
Author(s):  
H. Molina ◽  
R. Gomez ◽  
W. Calderon ◽  
C. Ramos ◽  
P. Marchetti ◽  
...  
Keyword(s):  
Latissimus Dorsi ◽  
Muscle Flap ◽  
Latissimus Dorsi Muscle ◽  
Latissimus Dorsi Muscle Flap ◽  
Dorsi Muscle

Clenbuterol Induces Hypertrophy of the Latissimus Dorsi Muscle and Heart in the Rat With Molecular and Phenotypic Changes

Circulation ◽  
1995 ◽  
Vol 92 (9) ◽  
pp. 483-489 ◽  
Author(s):  
Mario Petrou ◽  
Dylan G. Wynne ◽  
Kenneth R. Boheler ◽  
Magdi H. Yacoub
Keyword(s):  
Latissimus Dorsi ◽  
Latissimus Dorsi Muscle ◽  
Phenotypic Changes ◽  
Dorsi Muscle

Latissimus dorsi muscle flap

2007 ◽  
Vol 2 (2) ◽  
pp. 88-93
Author(s):  
G. Balakrishnan ◽  
A. Sivakumar ◽  
S. Vijayaragavan
Keyword(s):  
Latissimus Dorsi ◽  
Muscle Flap ◽  
Latissimus Dorsi Muscle ◽  
Latissimus Dorsi Muscle Flap ◽  
Dorsi Muscle

Satellite cell activation in the stretch-enlarged anterior latissimus dorsi muscle of the adult quail

1991 ◽  
Vol 260 (2) ◽  
pp. C206-C212 ◽  
Author(s):  
P. K. Winchester ◽  
M. E. Davis ◽  
S. E. Alway ◽  
W. J. Gonyea
Keyword(s):  
Satellite Cell ◽  
Satellite Cells ◽  
Latissimus Dorsi ◽  
Tritiated Thymidine ◽  
Cell Activity ◽  
Muscle Length ◽  
Latissimus Dorsi Muscle ◽  
Cell Labeling ◽  
Dorsi Muscle ◽  
Anterior Latissimus Dorsi

Satellite cell activity was examined in the stretch-enlarge anterior latissimus dorsi muscle (ALD) of the adult quail. Thirty-seven birds had a weight equal to 10% of their body mass attached to one wing while the contralateral wing served as an intra-animal control. At various time intervals after application of the wing weight (from 1 to 30 days), the birds were injected with tritiated thymidine and killed 1 h later. Stretched muscle length was greater by day 1 and mass by day 3 when compared with the contralateral muscle. Satellite cells actively synthesizing DNA were quantitated in fiber segments of the control and stretched ALD. A minimum of 1,500 muscle nuclei (satellite cell nuclei and myonuclei) were counted in each muscle. Labeling in stretched muscle was expressed by the percent labeled nuclei per total nuclei counted. Satellite cell labeling was initiated by day 1, peaked between days 3 and 7, and was not statistically different from control values at day 30. These results demonstrate that satellite cells are induced to enter the cell cycle in the stretch-enlarged ALD muscle from the adult quail, and the peak of proliferative activity is within the first week of stretch.

Progressive Latissimus Dorsi Muscle Denervation for Free-Flap Dynamic Cardiomyoplasty

1996 ◽  
Vol 11 (4) ◽  
pp. 256-263 ◽  
Author(s):  
Michel Tapia ◽  
Juan C. Chachques ◽  
Michael J. Tolan ◽  
Michel Pellerin ◽  
Fabrice Fontaliran ◽  
...  
Keyword(s):  
Free Flap ◽  
Latissimus Dorsi ◽  
Latissimus Dorsi Muscle ◽  
Muscle Denervation ◽  
Dorsi Muscle ◽  
Dynamic Cardiomyoplasty

Preventive Wrapping of the Fragile Tracheobronchial Wall Using a Flap of Latissimus Dorsi Muscle during Esophagectomy after Chemoradiotherapy

2008 ◽  
Vol 41 (3) ◽  
pp. 279-283 ◽  
Author(s):  
Y. Sato ◽  
S. Motoyama ◽  
K. Maruyama ◽  
K. Hayashi ◽  
S. Usami ◽  
...  
Keyword(s):  
Latissimus Dorsi ◽  
Latissimus Dorsi Muscle ◽  
Dorsi Muscle
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