Swimmers’ shoulder side asymmetry at rest and after aerobic load

AimDuring a golf swing, the lead hip (left hip in a right-handed player) rotates rapidly from external to internal rotation, while the opposite occurs in the trail hip. This study assessed the morphology and pathology of golfers’ hips comparing lead and trail hips.MethodsA cohort of elite golfers were invited to undergo MRI of their hips. Hip morphology was evaluated by measuring acetabular depth (pincer shape=negative measure), femoral neck antetorsion (retrotorsion=negative measure) and α angles (cam morphology defined as α angle >55° anteriorly) around the axis of the femoral neck. Consultant musculoskeletal radiologists determined the presence of intra-articular pathology.Results55 players (mean age 28 years, 52 left hip lead) underwent MRI. No player had pincer morphology, 2 (3.6%) had femoral retrotorsion and 9 (16%) had cam morphology. 7 trail hips and 2 lead hips had cam morphology (p=0.026). Lead hip femoral neck antetorsion was 16.7° compared with 13.0° in the trail hip (p<0.001). The α angles around the femoral neck were significantly lower in the lead compared with trail hips (p<0.001), with the greatest difference noted in the anterosuperior portion of the head neck junction; 53° vs 58° (p<0.001) and 43° vs 47° (p<0.001). 37% of trail and 16% of lead hips (p=0.038) had labral tears.ConclusionsGolfers’ lead and trail hips have different morphology. This is the first time side-to-side asymmetry of cam prevalence has been reported. The trail hip exhibited a higher prevalence of labral tears.

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Structure of sunspots observed with Hinode Solar Optical Telescope

Proceedings of the International Astronomical Union ◽

10.1017/s174392131101581x ◽

2010 ◽

Vol 6 (S273) ◽

pp. 478-482

Author(s):

Debi Prasad Choudhary ◽

Gordon A. MacDonald ◽

Na Deng ◽

Shimizu Toshifumi

Keyword(s):

Disk Center ◽

Optical Telescope ◽

Solar Optical Telescope ◽

Side Asymmetry

AbstractWe studied 16 sunspots with different sizes and shapes using the observations with the Hinode Solar Optical Telescope. The ratio of G-band and CaII H images reveal rich structures both within the umbra and penumbra of most spots. The striking features are the compact blob at the foot point of the umbra side of the penumbral fibrils with disk center-limb side asymmetry. In this paper, we present properties of these features using the spectropolarimetry and images in G-band, CaII and blue filters. We discuss the results using the contemporary models of the sunspots.

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Identification of Sex from Metacarpals: Effect of Side Asymmetry

Journal of Forensic Sciences ◽

10.1520/jfs13704j ◽

1994 ◽

Vol 39 (5) ◽

pp. 13704J ◽

Cited By ~ 48

Author(s):

Richard A. Lazenby

Keyword(s):

Side Asymmetry

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Analysis Of Side-to-side Asymmetry Assessment Of The Shoulder Rotators By Angle Specificity

Medicine & Science in Sports & Exercise ◽

10.1249/01.mss.0000477366.05577.a8 ◽

2015 ◽

Vol 47 ◽

pp. 348

Author(s):

Cassio V. Ruas ◽

Ronei S. Pinto ◽

Eduardo L. Cadore ◽

Lee E. Brown

Keyword(s):

Side Asymmetry

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Proximal Femoral Asymmetry in Japanese Patients before Total Hip Arthroplasty

10.29007/ms33 ◽

2019 ◽

Author(s):

Maximilian C. M. Fischer ◽

Kunihiko Tokunaga ◽

Masashi Okamoto ◽

Klaus Radermacher

Keyword(s):

Total Hip Arthroplasty ◽

Hip Arthroplasty ◽

Healthy Subjects ◽

Preoperative Planning ◽

Contralateral Side ◽

Morphological Parameters ◽

Neck Length ◽

Ipsilateral Side ◽

Femoral Length ◽

Side Asymmetry

Templating is an important and established step in the preoperative planning process of total hip arthroplasty (THA) in order to select the size and position of the implant. In severely arthritic cases, the unaffected contralateral side is sometimes used as a reference to reconstruct morphological parameters of the planned implantation (ipsilateral) side, for example the femoral offset, the leg length or the antetorsion. Recent studies have shown that a significant side-to-side asymmetry of important proximal femoral parameters already exists in healthy subjects questioning the validity of the contralateral side as a reference. However, if preoperative asymmetry is larger than asymmetry in healthy subjects, preoperative planning can still make use of the contralateral side to target a postoperative result within the range of physiological asymmetry. Therefore, the specific objective of this study was to quantify the preoperative side-to-side asymmetry of five important morphological parameters of the proximal femur. Significant side-to- side differences between the ipsilateral side and the contralateral side were detected for the antetorsion, the offset, the neck length and the femoral length. The antetorsion is significantly higher for the ipsilateral side whereas offset, neck length and femoral length are significantly smaller. Mean and maximum difference in antetorsion is almost twice as high for the THA patients in comparison to healthy subjects. The same trend can be observed for the femoral length, less pronounced also for the caput-collum-diaphyseal angle. The comparison of proximal femoral side-to-side differences for subjects before THA and healthy subjects leads to the conclusion that contralateral templating can be a reasonable basis for THA planning of severely arthritic hips if the contralateral side shows no signs of osteoarthritis or developmental dysplasia.

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Near/far side asymmetry in the tidally heated Moon

Icarus ◽

10.1016/j.icarus.2019.04.010 ◽

2019 ◽

Vol 329 ◽

pp. 182-196 ◽

Cited By ~ 3

Author(s):

Alice C. Quillen ◽

Larkin Martini ◽

Miki Nakajima

Keyword(s):

Side Asymmetry

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Hypertrophy of Lumbopelvic Muscles in Inactive Women: A 36-Week Pilates Study

Sports Health A Multidisciplinary Approach ◽

10.1177/1941738120918381 ◽

2020 ◽

Vol 12 (6) ◽

pp. 547-551

Author(s):

Cecilia Dorado ◽

Ana López-Gordillo ◽

José A. Serrano-Sánchez ◽

José A.L. Calbet ◽

Joaquín Sanchis-Moysi

Keyword(s):

Intervention Program ◽

Gluteus Maximus ◽

Muscle Volume ◽

Level Of Evidence ◽

Morphological Adaptations ◽

Quadratus Lumborum ◽

Muscle Adaptations ◽

Before And After ◽

Level 3 ◽

Side Asymmetry

Background: The use of Pilates in various fields of sport sciences and rehabilitation is increasing; however, little is known about the muscle adaptations induced by this training method. Hypothesis: A standardized Pilates training program for beginners (9 months; 2 sessions of 55 minutes per week) will increase the muscle volume and reduce potential side-to-side asymmetries of the quadratus lumborum, iliopsoas, piriformis, and gluteus muscles (gluteus maximus, medius, and minimus). Study Design: Controlled laboratory study. Level of Evidence: Level 3. Method: A total of 12 inactive, healthy women (35.7 ± 5.4 years) without previous experience in Pilates were randomly selected to participate in a supervised Pilates program (36 weeks, twice weekly). Muscle volume (cm3) was determined using magnetic resonance imaging at the beginning and end of the intervention program. Side-to-side asymmetry was calculated as [(left – right volume) × 100/right volume]. Results: Small, nonsignificant ( P > 0.05) differences in the volume of the quadratus lumborum, iliopsoas, piriformis, and gluteus muscles were observed between pre– and post–Pilates program timepoints. Before and after Pilates, side-to-side asymmetry was less than 6% and nonsignificant in all muscles analyzed. Conclusion: Modern Pilates performed twice weekly for 9 months did not elicit substantial changes in the volume and degree of asymmetry of the selected lumbopelvic muscles in inactive women. Clinical Relevance: The benefits of Pilates in rehabilitation or training are likely elicited by neuromuscular rather than morphological adaptations. Pilates has no significant impact on muscle volume and does not alter side-to-side ratios in muscle volume (degree of asymmetry) of the lumbopelvic muscles.

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Orbital volume, ophthalmic sequelae and severity in unilateral coronal synostosis

Child s Nervous System ◽

10.1007/s00381-021-05065-3 ◽

2021 ◽

Author(s):

Sophia A. J. Kronig ◽

Otto D. M. Kronig ◽

Marcel Zurek ◽

Léon N. A. Van Adrichem

Keyword(s):

Volume Ratio ◽

Contralateral Side ◽

Rank Test ◽

Unaffected Side ◽

Orbital Volume ◽

Affected Side ◽

Signed Rank ◽

Signed Rank Test ◽

Coronal Synostosis ◽

Side Asymmetry

Abstract Purpose Unilateral coronal synostosis (UCS) results in an asymmetrical skull, including shallow and asymmetrical orbits, associated with reduced orbital volume and high prevalences of ophthalmic sequelae. Aim is to link orbital volumes in patients with UCS to severity according to UCSQ (Utrecht Cranial Shape Quantifier) and presence of ophthalmic sequelae. Methods We included preoperative patients with UCS (≤ 18 months). Orbital volume was measured on CT scans by manual segmentation (Mimics software (Materialise, Leuven, Belgium)), and severity of UCS was determined by UCSQ. Orbital volume of affected side was compared to unaffected side using Wilcoxon signed rank test. Orbital volume ratio was calculated (affected/unaffected volume) and compared to the category of UCSQ by Kruskal-Wallis test. Opthalmic sequelae were noted. Results We included 19 patients (mean age 7 months). Orbital volume on affected side was significantly lower (p = 0.001), mean orbital volume ratio was 0.93 (SD 0.03). No significant differences in group means of orbital volume ratio between different levels of severity of UCSQ were found (Kruskal-Wallis H (2) = 0.873; p > 0.05). Ophthalmic sequelae were found in 3 patients; one had adduction impairment and strabismus (mild UCS), one had astigmatism (moderate UCS), and one had abduction impairment (on both ipsi- and contralateral side) and vertical strabismus (severe UCS). Conclusion No association between orbital volume ratio and severity of UCS was found. Side-to-side asymmetry in orbital volume was noted. No association between either preoperative orbital volume ratio or severity of UCS and the presence of preoperative ophthalmic sequelae was found.

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