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Homo : Internationale Zeitschrift Fur... Apr 2023Discussions of the evolution of sexual dimorphism in torso shape and the pectoral region assume that this dimorphism exists independently of body size. We test this... (Comparative Study)
Comparative Study
Discussions of the evolution of sexual dimorphism in torso shape and the pectoral region assume that this dimorphism exists independently of body size. We test this assumption in two human populations and further examine what is needed to understand sexual dimorphism in the pectoral region. Modern human males have broad shoulders and narrow hips relative to females, lending males a more triangular torso. The wider female pelvis is commonly attributed to obstetric pressures while the broader male pectoral girdle has been argued to be an adaptation that improves hunting or intrasexual competition. While sexual dimorphism in the pelvic girdle is known to exist after adjusting for body size across human populations, most studies of sexual dimorphism in the pectoral girdle have not adjusted the data to account for sexual size dimorphism or compared different ancestral groups. The aforementioned hypotheses explaining sexual dimorphism in the clavicle and scapula as products of natural selection are predicated on the untested assumption that sex differences do not scale with body size. This study tests this assumption by comparing various measurements of the pectoral girdle, the pelvic girdle, and six pectoral-pelvic indices of black and white South Africans of known sex and height to test whether the sexes and ancestral groups will differ in these values after adjusting for differences in body size. Comparisons of ancestral groups reveal that white South Africans have larger pectoral and pelvic dimensions than black South Africans, but that blacks have larger index values than whites. Regardless of differences in ancestry and body size, males have significantly broader pectoral regions as indicated by comparisons of both individual pectoral measurements and pectoral-pelvic indices. This pattern of sexual dimorphism is reversed in the pelvic region where females have larger skeletal elements. In addition to finding both absolute and relative differences in mean values for the pectoral and pelvic skeleton, females and males and blacks and whites differ in the scaling relationship of these traits, suggesting different allometric trajectories for these bones that may be explained by their distinct evolutionary functions, their adaptations to specific environments, or by changes in lengths due to age. These results suggest that sexual dimorphism in the pectoral region is not a product of scaling and that differences in this region reflect adaptive forces acting in unique ways on each sex, consistent with the assumptions of earlier evolutionary explanations.
Topics: Female; Humans; Male; Black People; Sex Characteristics; Pelvic Bones; White People; South Africa; Bones of Upper Extremity; Race Factors; Sex Factors; Body Height; Biological Evolution
PubMed: 36628541
DOI: 10.1127/homo/2023/1486 -
Physical Therapy Apr 2022Pregnancy-related pelvic girdle pain (PGP) may persist or occur postpartum and negatively affects women's lives. There is uncertainty regarding the association between...
OBJECTIVE
Pregnancy-related pelvic girdle pain (PGP) may persist or occur postpartum and negatively affects women's lives. There is uncertainty regarding the association between the structures of the bony pelvis, diastasis recti abdominis (DRA), pain processing, and PGP and to what extent these factors should be considered during physical therapy. This study aimed to evaluate the differences between women with and without PGP shortly after delivery regarding the separation of a pubic symphysis, DRA, and pain catastrophizing.
METHODS
Women diagnosed with PGP 24 to 72 hours after vaginal delivery were matched to pain-free controls according to age and parity. Ultrasound evaluations of diastasis recti (interrecti distance [IRD]) during rest and curl-up task and pubic symphysis (interpubic width) were performed. The Pain Catastrophizing Scale was used to assess the level of catastrophizing. A special Cox regression model was used to fit a conditional logistic regression for a 1:2 matched case-control study.
RESULTS
Thirty-five women with clinically diagnosed PGP and 70 matched controls were included in the study. The PGP group had a significantly higher pre-pregnancy body mass index than the control group. After adjusting for body mass index in multiple conditional logistic regression, the interpubic distance (odds ratio = 1.64; 95% CI = 1.22 to 2.20) and IRD during curl-up (odds ratio = 2.01; 95% CI = 1.08 to 3.74) were significantly associated with PGP. Pain catastrophizing and IRD at rest were not associated with PGP in univariable or multivariable analysis.
CONCLUSIONS
Pain catastrophizing is similar for women with and without PGP early postpartum. However, the degree of the pubic symphysis and rectus abdominis separation during the curl-up task are positively associated with PGP shortly after delivery.
IMPACT
This study indicates that a reconsideration of the way we look at DRA is warranted. The development of a more comprehensive assessment including objective measurements and a biopsychosocial understanding is needed to inform directions for further postpartum physical therapy.
Topics: Case-Control Studies; Catastrophization; Diastasis, Muscle; Female; Humans; Pelvic Girdle Pain; Pregnancy; Pubic Symphysis; Rectus Abdominis
PubMed: 35079827
DOI: 10.1093/ptj/pzab311 -
Medical Problems of Performing Artists Mar 2023Prolonged sitting and performance hours in musicians may lead to an increased risk of musculoskeletal pain around the spine and pelvis. This situation may lead to an...
BACKGROUND
Prolonged sitting and performance hours in musicians may lead to an increased risk of musculoskeletal pain around the spine and pelvis. This situation may lead to an asymmetry of spinal segments, which in turn may correlate with muscle contractions around the lumbopelvic area and can lead to musculoskeletal pelvic girdle pain. The aim of this study was to investigate the segmental mobility of the vertebral column in two groups of musicians, those with and without pelvic girdle pain.
METHODS
This study included 45 musicians who played their instrument for at least 10 years. Musicians were divided into two groups depending on if they had pelvic girdle pain or not. Spinal mobility was evaluated by a hand-held computer-assisted device called the Spinal Mouse system, and pelvic girdle pain assessments were evaluated using orthopedic tests including the active straight leg raise (ASLR), flexion abduction external rotation (FABER), pelvic pain provocation (P4), and long dorsal ligament palpation (LDL).
RESULTS
The current study found no significant differences in the thoracic, lumbar, and sacral curves in the trunk flexion tests between musicians with and without pelvic girdle pain (p=0.28, 0.54, and 0.63). However, analysis of spinal mobility revealed that musicians with pelvic pain had significant limitations of spinal flexion mobility, mainly in the thoracolumbar region in the sagittal plane (p=0.02 and 0.01).
CONCLUSIONS
This study revealed a significant correlation between pelvic girdle pain and limitations of segmental spinal flexion mainly in the thoracolumbar region of the sagittal plane in musicians. A lack of spinal mobility appears to be prevalent among musicians with pelvic girdle pain.
Topics: Humans; Animals; Mice; Pelvic Girdle Pain; Spine; Pelvic Pain; Musculoskeletal Pain; Social Group
PubMed: 36854971
DOI: 10.21091/mppa.2023.1002 -
Disability and Rehabilitation Apr 2020The aims of this study were to translate and culturally adapt The Pelvic Girdle Questionnaire to Swedish, and to evaluate the construct and discriminative validity. A...
The aims of this study were to translate and culturally adapt The Pelvic Girdle Questionnaire to Swedish, and to evaluate the construct and discriminative validity. A translation and cultural adaptation process was performed according to international guidelines. Pilot tests were conducted among 16 women during pregnancy and post-partum. Analysis of the construct and discriminative validity of the Swedish version of the Pelvic Girdle Questionnaire was performed in a sample of 177 pregnant women suffering from pain in the lumbo-pelvic area. Participants completed the Pelvic Girdle Questionnaire along with Oswestry Disability Index, numeric rating scales for pain intensity and for pelvic girdle pain concerns. The Swedish version of the Pelvic Girdle Questionnaire showed high internal consistency with Cronbach's alphas between 0.82 and 0.96, good convergent validity with high correlations with the Oswestry Disability Index and the pain intensity numeric rating scale, whereas moderate correlation was shown between the concerns numeric rating scale and the other instruments as hypothesized. Receiver operating characteristic curves showed good discriminatory capacity for women in need of treatment. The Swedish version of the Pelvic Girdle Questionnaire has patient acceptability. It has good construct and discriminative validity for measurements of consequences of pregnancy-related pelvic girdle pain among Swedish speaking women.IMPLICATIONS FOR REHABILITATIONPregnancy-related pelvic girdle pain may be disabling and long-lasting, however treatable when identified.The Pelvic Girdle Questionnaire is the only condition-specific, reliability tested and validated questionnaire for pelvic girdle pain.The Swedish version of the Pelvic Girdle Questionnaire has patient acceptability, good construct validity for pelvic girdle pain among Swedish speaking women, and shows good discriminative capacity for women in need of treatment.
Topics: Cross-Cultural Comparison; Disability Evaluation; Female; Humans; Pelvic Girdle Pain; Pregnancy; Psychometrics; Reproducibility of Results; Surveys and Questionnaires; Sweden
PubMed: 30707631
DOI: 10.1080/09638288.2018.1515991 -
Spine Jul 2021Cross-sectional study conducted between December 2017 and October 2019.
STUDY DESIGN
Cross-sectional study conducted between December 2017 and October 2019.
OBJECTIVE
To determine the prevalence and risk factors associated with pregnancy-related pelvic girdle pain (PPGP) in Australia.
SUMMARY OF BACKGROUND DATA
PPGP is a common condition worldwide yet the prevalence and associated risk factors are not known in Australia.
METHODS
A random sample of pregnant women (N = 780) of (mean [SD]) 31 (5) years of age between 14 and 38 weeks gestation attending ante-natal care in a tertiary referral hospital in Sydney, Australia was conducted. The main outcome measure was point-prevalence of PPGP as classified by recommended guidelines including a physical examination. A number of potential risk factors, including socio-demographic characteristics, country of birth, ethnicity, history of low back pain (LBP) and PPGP, family history of PPGP, occupational factors, and physical activity were investigated with logistic regression.
RESULTS
The point-prevalence of PPGP in a random sample of 780 Australian women was 44% with the odds of having PPGP increasing with each additional week of gestation (odds ratio [OR]) (OR 1.02). Increasing parity (P = 0.03, OR 1.15), country of birth (P = 0.03), and greater duration of time spent standing (P = 0.009, OR 1.06) were associated with PPGP. The strongest predictors of PPGP were previous LBP and/or PPGP both pregnancy (P < 0.001, OR 4.35) and not pregnancy related (P < 0.001, OR 2.24), and a family history of PPGP (P < 0.001, OR 3.76).
CONCLUSION
The prevalence of PPGP in Australian women was high with almost half the sample classified with PPGP, matching data reported worldwide. The identified risk factors associated with PPGP can be included in routine ante-natal care to screen women and identify those at risk of this common and disabling condition.Level of Evidence: 1.
Topics: Adult; Australia; Cross-Sectional Studies; Female; Humans; Pelvic Girdle Pain; Pregnancy; Pregnancy Complications; Risk Factors
PubMed: 33492087
DOI: 10.1097/BRS.0000000000003954 -
The Protein Journal Aug 2021The limb-girdle muscular dystrophies (LGMD) are a collection of genetic diseases united in their phenotypical expression of pelvic and shoulder area weakness and... (Review)
Review
The limb-girdle muscular dystrophies (LGMD) are a collection of genetic diseases united in their phenotypical expression of pelvic and shoulder area weakness and wasting. More than 30 subtypes have been identified, five dominant and 26 recessive. The increase in the characterization of new genotypes in the family of LGMDs further adds to the heterogeneity of the disease. Meanwhile, better understanding of the phenotype led to the reconsideration of the disease definition, which resulted in eight old subtypes to be no longer recognized officially as LGMD and five new diseases to be added to the LGMD family. The unique variabilities of LGMD stem from genetic mutations, which then lead to protein and ultimately muscle dysfunction. Herein, we review the LGMD pathway, starting with the genetic mutations that encode proteins involved in muscle maintenance and repair, and including the genotype-phenotype relationship of the disease, the epidemiology, disease progression, burden of illness, and emerging treatments.
Topics: Genotype; Humans; Muscular Dystrophies, Limb-Girdle; Mutation
PubMed: 34110586
DOI: 10.1007/s10930-021-10006-9 -
Irish Journal of Medical Science Dec 2022Mutations in the alpha-sarcoglycan gene cause limb-girdle muscular dystrophy 2D, an autosomal recessive muscle wasting disorder primarily affecting the muscles of the...
BACKGROUND
Mutations in the alpha-sarcoglycan gene cause limb-girdle muscular dystrophy 2D, an autosomal recessive muscle wasting disorder primarily affecting the muscles of the shoulder and pelvic girdles. To date, no previous study has collated all known mutations in alpha-sarcoglycan and mapped these to the associated phenotypes.
AIMS
To examine for correlations between mutation locations, or mutation type, and the phenotype caused in all reported mutations in alpha-sarcoglycan.
METHODS
We present a systematic literature review examining correlations between mutation locations, or mutation type, and the phenotype caused in all reported cases of limb-girdle muscular dystrophy 2D.
RESULTS
From 134 unique genotypes collated, a strong prevalence of missense mutations (64% of all unique mutations) was found in this gene. Mutation hotspots were noted in exon three and the extracellular domain, with mutation densities varying significantly between both exons and protein domains (p ≤ 0.01). All compound heterozygous limb-girdle muscular dystrophy 2D patients with cardiac involvement contained at least one mutation in exon three, a novel finding. All non-sense mutations in alpha-sarcoglycan give a severe phenotype, as do genotypes involving a combination of exons four and five. This study confirms on a large, diverse cohort the extremely high prevalence of the c.229C > T mutation.
CONCLUSIONS
This study demonstrates the vast variation in disease severity seen between patients possessing the same mutation, highlighting the difficulty identifying genotype-phenotype correlations in this condition. Novel findings including the involvement of exon three in all compound heterozygous patients who suffered from cardiomyopathy, and the severity of mutations involving exons four and five may help to guide investigations and therapeutic decisions in an era of personalised medicine.
Topics: Humans; Sarcoglycanopathies; Sarcoglycans; Exons; Phenotype; Mutation; Genetic Association Studies
PubMed: 35040091
DOI: 10.1007/s11845-021-02855-1 -
Acta Obstetricia Et Gynecologica... Oct 2023Pelvic girdle pain during and after pregnancy is a major public health problem with significant daily problems for affected women and their families. There is now... (Observational Study)
Observational Study
INTRODUCTION
Pelvic girdle pain during and after pregnancy is a major public health problem with significant daily problems for affected women and their families. There is now accumulating evidence that pregnancy-related pelvic girdle pain originates from the sacroiliac joints and the pubic symphysis as well as their extra-articular ligaments. However, the heritability of the disease remains to be determined. We hypothesized that there is an increased familial risk of pregnancy-related pelvic girdle pain.
MATERIAL AND METHODS
A population-based national database linkage registry study of approximately 9.3 million individuals within 4.2 million families in Sweden with a recruitment period from 1997 to 2018. The Swedish Multi-generation register was used to find female pairs of twins, full siblings, half-siblings and first cousins where both in the pairs had a completed pregnancy. The outcome measure was diagnosis of pregnancy-related pelvic girdle pain (International Classification of Diseases-10 O26.7 [1997-2018]) in the first pregnancy. Data was obtained from the Swedish Hospital Discharge Register, the Swedish Outpatient Care Register, the Swedish Medical Birth Register, the Primary Healthcare Register, and Medical Treatment Register. Cox regression analysis was used to calculate adjusted estimated effect of the exposure variable familial history of pregnancy-related pelvic girdle pain on the outcome variable pregnancy-related pelvic girdle pain at first birth.
RESULTS
From the registers, 1 010 064 women pregnant with their first child within 795 654 families were collected. In total, 109 147 women were diagnosed with pregnancy-related pelvic girdle pain. The adjusted hazard ratio for a familial risk of pregnancy-related pelvic girdle pain was 2.09 (95% CI 1.85-2.37) among twins (monozygotic and dizygotic), 1.78 (95% CI 1.74-1.82) in full siblings, 1.16 (95% CI 1.06-1.28) in half-siblings from the mother, 1.09 (95% CI 1.024-1.16) in half-siblings from the father and 1.09 (95% CI 1.07-1.12) in first cousins.
CONCLUSIONS
This nationwide observational study showed a familial clustering of pregnancy-related pelvic girdle pain. The hazard ratio for the condition was associated with the degree of relatedness, suggesting that heredity factors contribute to the development of pregnancy-related pelvic girdle pain. There is no causal treatment available for pregnancy-related pelvic girdle pain and further studies are now encouraged to clarify the specific genetic factors that contribute to the disease and for future targeted interventions.
Topics: Female; Humans; Pregnancy; Family; Genetic Predisposition to Disease; Heredity; Pelvic Girdle Pain; Pregnancy Complications; Sweden
PubMed: 37470484
DOI: 10.1111/aogs.14646 -
Minerva Anestesiologica Jan 2020
Topics: Chronic Pain; Female; Humans; Pelvic Girdle Pain; Pelvic Pain; Postpartum Period
PubMed: 31238646
DOI: 10.23736/S0375-9393.19.13893-X -
Journal of Manipulative and... 2020The purpose of this study was to translate, cross-culturally adapt, and assess the reliability and validity of the Pelvic Girdle Questionnaire (PGQ) in pregnant Nepalese...
OBJECTIVE
The purpose of this study was to translate, cross-culturally adapt, and assess the reliability and validity of the Pelvic Girdle Questionnaire (PGQ) in pregnant Nepalese women.
METHODS
The cross-cultural adaptation process was conducted according to the Guillemin guidelines. Reliability and validity were assessed using cross-sectional design. The participants responded to questionnaires of sociodemographics, the Nepali version of the PGQ, the Oswestry Disability Index, the Patient-Specific Functional Scale, the 5-item version of the Edinburgh Depression Scale, and the Numerical Pain Rating Scale. The internal consistency was assessed with Cronbach's alpha. The test-retest reliability was calculated using the intraclass correlation coefficient and smallest detectable change. Construct validity was assessed by testing 9 a priori hypotheses that examine correlations between the PGQ activity and symptom subscales, and also among the PGQ subscales and Oswestry Disability Index, Numerical Pain Rating Scale, Patient-Specific Functional Scale, and 5-item version of the Edinburgh Depression Scale. Spearman and Pearson's correlation were used to assess the correlations.
RESULTS
A sample of 111 pregnant women were included in the study. The Cronbach's alpha for the Nepali version of the total PGQ was good (α = 0.83), and the test-retest reliability was acceptable (ICC, 0.72) with a measurement error of SDC 18.6 points. Seven of the 9 hypotheses found support, which confirms acceptable construct validity of the Nepali PGQ.
CONCLUSION
The Nepali version of the PGQ is a reliable and valid tool for assessing pelvic girdle pain in pregnant Nepalese women.
Topics: Adaptation, Physiological; Adult; Cross-Cultural Comparison; Cross-Sectional Studies; Female; Humans; Lower Extremity; Male; Pain Measurement; Pelvic Girdle Pain; Pregnancy; Pregnancy Complications; Psychometrics; Reproducibility of Results; Surveys and Questionnaires; Translating; Young Adult
PubMed: 32739042
DOI: 10.1016/j.jmpt.2019.04.009