A Comparative Study of the Modified Baumann's Angle Between the Dominant and Non-Dominant Sides in a North Indian Pediatric Population.

Background The literature points towards the fact that paediatric elbow fractures happen more frequently and have greater variability when contrasted with adults. Between 65%-75% of pediatric fractures involve the upper extremity, and supracondylar humerus is the most common of them all. To know the exact site of injury and to estimate the degree of reduction after manipulation, the modified Baumann's angle, the Baumann's angle, the Humero-condylar angle, the Anterior humeral line, and the Radio-capitellar line are the parameters most commonly used. This study was carried out to compare the modified Baumann's angle between both upper limbs in the paediatric population. Methodology This cross-sectional study was conducted in a tertiary health care centre in Northern India for one year from September 1, 2021, to August 31, 2022. We included pediatric patients in the age group of 3-16 years. Age, sex, weight, height, BMI, secondary sexual characters, and handedness were noted in all the children enrolled in our study. In both the dominant and non-dominant sides, the mean arm length, the forearm length, the inter-epicondylar distance, the clinical carrying angle, the radiological carrying angle, and the modified Baumann's angle were calculated.  Results A total of 113 children were enrolled in the study. The majority of children (71.7%) had dominance on the right side. In both the dominant side and non-dominant side, mean arm length, forearm length, inter-epicondylar distance, clinical carrying angle, radiological carrying angle, and modified Baumann's angle values were calculated. On evaluating the data statistically, a significant difference between the two sides was observed for all the parameters (p<0.05), except forearm length (p-value -0.954). Multivariate analysis showed that only BMI was significantly negatively associated with modified Baumann's angle (p=0.016), and only age (0.019) and BMI (<0.001) were found to be significantly associated with the difference in modified Baumann's angle. Conclusions The findings of this study will be helpful in the management of elbow disorders and their reconstruction following trauma. A significant difference was found in the modified Baumann's angle between dominant and non-dominant sides, and it also showed a negative significant correlation with arm length, forearm length, and the presence of secondary sexual characteristics. The equations derived in this study will be helpful in the simple derivation of the modified Baumann's angle and its difference from simple measurements of the upper limb parameters.

Artificially raised roost temperatures lead to larger body sizes in wild bats.

Climate warming has major consequences for animal populations, as ambient temperature profoundly influences all organisms' physiology, behavior, or both.1 Body size in many organisms has been found to change with increased ambient temperatures due to influences on metabolism and/or access to resources.2,3,4,5,6 Changes in body size, in turn, can affect the dynamics and persistence of populations.7 Notably, in some species, body size has increased over the last decades in response to warmer temperatures.3,8 This has primarily been attributed to higher food availability,3 but might also result from metabolic savings in warmer environments.9,10 Bechstein's bats (Myotis bechsteinii) grow to larger body sizes in warmer summers,11 which affects their demography as larger females reproduce earlier at the expense of a shorter life expectancy.12,13 However, it remains unclear whether larger body sizes in warmer summers were due to thermoregulatory benefits or due to increased food availability. To disentangle these effects, we artificially heated communal day roosts of wild maternity colonies over four reproductive seasons. We used generalized mixed models to analyze these experimental results along with 25 years of long-term data comprising a total of 741 juveniles. We found that individuals raised in heated roosts grew significantly larger than those raised in unheated conditions. This suggests that metabolic savings in warmer conditions lead to increased body size, potentially resulting in the decoupling of body growth from prey availability. Our study highlights a direct mechanism by which climate change may alter fitness-relevant traits, with potentially dire consequences for population persistence.

Nationwide Stature Estimation from Forearm Length Measurements in Montenegrin Adolescents / Estimación de la Estatura a Partir de Mediciones de la Longitud del Antebrazo en Adolescentes Montenegrinos

SUMMARY: The purpose of this research is to determine a regression equation for estimation of stature from forearm length measurements. This research was carried out on 1200 subjects (604 male and 596 female) among the population of Montenegrin adolescents. The stature and forearm length measurements were taken according to the ISAK protocol, and the data were analyzed statistically. Linear regression analysis determined the prediction of forearm length on the criterion variable a body height at the significance level of p <0.05. These relations are presented in the form of scatter diagram. Thereby, we obtained the coefficient of determination, the multiple correlation coefficients, the partial correlation coefficient, the regression, t-test and standardized beta coefficient. The results of this research study confirmed that forearm length reliably predicts stature in both sexes of Montenegrin adolescents and revealed a very useful finding for physical anthropologists and experts from related fields. It was confirmed that there is a correlation between forearm length and body height (males: 31.9 %, females: 33.3 %).

El propósito de esta investigación fue determinar una ecuación de regresión para la estimación de la estatura a partir de medidas de la longitud del antebrazo. Esta investigación se llevó a cabo en 1200 sujetos (604 hombres y 596 mujeres) entre la población de adolescentes montenegrinos. Las medidas de estatura y longitud del antebrazo se tomaron de acuerdo con el protocolo ISAK y los datos se analizaron estadísticamente. El análisis de regresión lineal determinó la predicción de la longitud del antebrazo en la variable de criterio una altura del cuerpo en el nivel de significación de p <0,05. Estas relaciones se presentan en forma de diagrama de dispersión. De tal manera obtuvimos el coeficiente de determinación, los coeficientes de correlación múltiple, el coeficiente de correlación parcial, la regresión, la prueba t y el coeficiente beta estandarizado. Los resultados de este estudio confirmaron que la longitud del antebrazo predice de manera confiable la estatura en adolescentes montenegrinos de ambos sexos y reveló un hallazgo muy útil para los antropólogos físicos y expertos en áreas relacionadas. Se confirmó que existe una correlación entre la longitud del antebrazo y la altura del cuerpo (hombres: 31,9 %, mujeres: 33,3 %).

Morphometrics of the indian false vampire bat (Megaderma lyra) from district Jhelum, Pakistan / Morfometria do falso morcego vampiro indiano (Megadermalyra) do distrito de Jhelum, Paquistão

Abstract During the present study thirteen Megaderma lyra bats were observed roosting in dark, domed shaped room of Rohtas Fort, district Jhelum. Out of these, six specimens were captured from the roosting site, using hand net. All captured specimens were male. These bats were identified through their unique facial features, an erect and elongated nose-leaf, large oval ears that joined above the forehead and no tail. Mean head and body length of captured specimens was 80 mm, forearm length was 67 mm while average lengths of 3rd, 4th and 5th metacarpals were 51.73 mm, 55.17 mm and 60.42 mm, respectively. Mean skull length was 29.84 mm, breadth of braincase was 12.77 mm. Average Penis length of two specimens was 6.6 mm and total bacular length was 3.08 mm respectively. This is the first record of Megaderma lyra from district Jhelum.

Resumo Durante o presente estudo, 13 morcegos Megadermalyra foram observados empoleirados em uma sala escura em forma de cúpula no Forte Rohtas, distrito de Jhelum, dos quais 6 espécimes foram capturados no local usando rede manual. Todos os espécimes capturados eram machos. Esses morcegos foram identificados por suas características faciais únicas, uma folha nasal ereta e alongada, grandes orelhas ovais que se juntam acima da testa e sem cauda. O comprimento médio da cabeça e do corpo dos espécimes capturados foi de 80 mm, o comprimento do antebraço foi de 67 mm, enquanto os comprimentos médios do 3º, 4º e 5º metacarpos foram de 51,73 mm, 55,17 mm e 60,42 mm, respectivamente. O comprimento médio do crânio foi de 29,84 mm, e a largura da caixa craniana, de 12,77 mm. O comprimento médio do pênis de duas amostras foi de 6,6 mm, e o comprimento total do báculo foi de 3,08 mm. Este é o primeiro registro de Megadermalyra no distrito de Jhelum.

Body size information in large-scale acoustic bat databases.

BACKGROUND: Citizen monitoring programs using acoustic data have been useful for detecting population and community patterns. However, they have rarely been used to study broad scale patterns of species traits. We assessed the potential of acoustic data to detect broad scale patterns in body size. We compared geographical patterns in body size with acoustic signals in the bat species Pipistrellus pipistrellus. Given the correlation between body size and acoustic characteristics, we expected to see similar results when analyzing the relationships of body size and acoustic signals with climatic variables. METHODS: We assessed body size using forearm length measurements of 1,359 bats, captured by mist nets in France. For acoustic analyses, we used an extensive dataset collected through the French citizen bat survey. We isolated each bat echolocation call (n = 4,783) and performed automatic measures of signals, including the frequency of the flattest part of the calls (characteristic frequency). We then examined the relationship between forearm length, characteristic frequencies, and two components resulting from principal component analysis for geographic (latitude, longitude) and climatic variables. RESULTS: Forearm length was positively correlated with higher precipitation, lower seasonality, and lower temperatures. Lower characteristic frequencies (i.e., larger body size) were mostly related to lower temperatures and northern latitudes. While conducted on different datasets, the two analyses provided congruent results. DISCUSSION: Acoustic data from citizen science programs can thus be useful for the detection of large-scale patterns in body size. This first analysis offers a new perspective for the use of large acoustic databases to explore biological patterns and to address both theoretical and applied questions.

Evaluation of the elbow carrying angle in healthy individuals / Evaluación del ángulo de desplazamiento del codo en individuos sanos

SUMMARY: Carrying angle, or cubital angle defined as the acute angle formed by the median axis of the arm when forearm is in fully extended and supinated position. This angle changes with skelatal growth and maturity. This study was aimed to investigate the correlation of carrying angle with bi-acromial diameter and bi-acromial diameter/bi-trochanteric diameter in our healthy young adult population. This was a cross-sectional study that included 400 (204 male, 196 female) young adult students selected from Çukurova University aged between 18-25 years (mean±standard deviation of females: 20.11±2.05 years; mean±standard deviation of males: 20.45±1.82 years) which originated from different cities in Turkey. After recording demographic data, carrying angle, forearm length, arm length, bi-trochanteric diameter and bi-acromial diameter were measured by using nonelastic tape measure, pelvimeter and manuel goniometer. In addition, body mass index and bi-acromial diameter/bi-trochanteric diameter were calculated for each participants. The mean values of body height and weight were in following respectively for both genders: 178.53±6.40 cm (male), 163.88±5.73 cm (female); 74.89±10.81 kg (male), 57.56±8.61 kg (female). Whereas on dominant arm this angle was as in males 9.77°±2.82° and 13.94°±3.97° in females. The mean value of the carrying angle on nondominant arm in males was 9.85°±2.95° and 14.03°±4.08° in females. The mean carrying angle was 9.81°±2.82° in males and 13.99°±3.97° in females. There are linear relationship between the carrying angle and height (r=-0.474, p<0.001, bi-acromial diameter (r=-0.490, p<0.001), bi-acromial diameter/bi-trochanteric diameter (r=-0.449, p<0.001), forearm length (r=-0.366, p<0.001) and arm length (r=-0.273, p<0.001). We believe that the reference values of carrying angle will help the clinician in the management of elbow displacements, fractures, prosthetic design and diagnosis of epicondylar diseases.

RESUMEN: Se estudió el ángulo de sustentación o ángulo cubital definido como el ángulo agudo formado por el eje mediano del brazo al estar en posición completamente extendido y supinado el antebrazo. Este ángulo cambia con el crecimiento esquelético y la madurez. El objetivo de este estudio fue investigar la correlación del ángulo con el diámetro biacromial y el diámetro bi-acromial / diámetro bi-trocantérico en una población adulta joven y sana. Se realizó un estudio transversal que incluyó 400 (204 hombres, 196 mujeres) estudiantes adultos jóvenes seleccionados de la Universidad de Çukurova con edades comprendidas entre 18-25 años (media ± desviación estándar de las mujeres: 20,11 ± 2,05 años; media ± desviación estándar de los hombres: 20,45 ± 1,82 años) que se originaron en diferentes ciudades de Turquía. Después de registrar los datos demográficos, el ángulo de desplazamiento, la longitud del antebrazo, la longitud del brazo, el diámetro bi-trocantérico y el diámetro biacromial se midieron utilizando cinta métrica no elástica, pelvímetro y goniómetro manual. Además, se calcularon el índice de masa corporal y el diámetro bi-acromial / diámetro bi-trocantérico para cada participante. Los valores medios de la altura y el peso corporal fueron respectivamente para ambos sexos: 178,53 ± 6,40 cm (masculino), 163,88 ± 5,73 cm (femenino); 74,89 ± 10,81 kg (masculino), 57,56 ± 8,61 kg (femenino). Mientras que en el brazo dominante este ángulo fue como en los hombres 9,77° ± 2,82° y 13,94° ± 3,97° en las mujeres. El valor medio del ángulo de transporte en el brazo no dominante en los hombres fue de 9,85° ± 2,95° y de 14,03° ± 4,08° en las mujeres. El ángulo medio de desplazamiento fue de 9,81° ± 2,82° en hombres y 13,99 ° ± 3,97 ° en mujeres. Hay una relación lineal entre el ángulo de desplazamiento y la altura (r = -0,474, p <0,001, diámetro bi-acromial (r = -0,490, p <0,001), diámetro biacromial / diámetro bi-trocantérico (r = -0,449, p <0,001), longitud del antebrazo (r = -0,366, p <0,001) y longitud del brazo (r = -0,273, p <0,001). Creemos que los valores de referencia del ángulo de carga ayudarán al clínico en el manejo de los desplazamientos del codo, las fracturas, el diseño protésico y el diagnóstico de enfermedades epicondilares.

Estimated height from knee height or ulna length and self-reported height are no substitute for actual height in inpatients.

OBJECTIVE: The aim of this study was to evaluate the precision of estimated height from ulna length (UL) using the Malnutrition Universal Screening Tool (MUST) equation and compare it with predicted height from knee height (KH), and self-reported height in estimating actual body height in inpatients. METHODS: This cross-sectional study was carried out with patients admitted to an emergency service of a tertiary public hospital. Data were collected, at the patients' bedsides, from a specific questionnaire and anthropometric measurements. Height was estimated from UL and KH, and compared with self-reported and actual height. The Bland-Altman methods were used to evaluate agreement between measures. RESULTS: This study included 427 inpatients (52.6% women, ages 54.30 ± 15.39 y). A significant difference was found when actual height (161.07 ± 8.77 cm) was compared with estimated height from KH (163.64 ± 8.61 cm) and self-reported height (164.54 ± 8.95 cm). A not significant difference of 1.07 cm was observed between actual height and estimated height from UL (160.74 ± 7.48 cm); however, the limits of agreement between measures were large (from 13.69 to 14.39 cm). The difference observed between actual and self-reported height was higher in men (-8.50 [-17.00; -2.00] cm) than in women (1.00 [-6.00; 8.00] cm), whereas the difference between actual height and estimated height from KH and UL did not differ statistically between men and women. CONCLUSIONS: Estimated height from UL (MUST equation), self-reported height and estimated height from KH led to errors in predicting actual height of inpatients.

Morphometrics of the indian false vampire bat (Megaderma lyra) from district Jhelum, Pakistan

Abstract During the present study thirteen Megaderma lyra bats were observed roosting in dark, domed shaped room of Rohtas Fort, district Jhelum. Out of these, six specimens were captured from the roosting site, using hand net. All captured specimens were male. These bats were identified through their unique facial features, an erect and elongated nose-leaf, large oval ears that joined above the forehead and no tail. Mean head and body length of captured specimens was 80 mm, forearm length was 67 mm while average lengths of 3rd, 4th and 5th metacarpals were 51.73 mm, 55.17 mm and 60.42 mm, respectively. Mean skull length was 29.84 mm, breadth of braincase was 12.77 mm. Average Penis length of two specimens was 6.6 mm and total bacular length was 3.08 mm respectively. This is the first record of Megaderma lyra from district Jhelum.

Resumo Durante o presente estudo, 13 morcegos Megadermalyra foram observados empoleirados em uma sala escura em forma de cúpula no Forte Rohtas, distrito de Jhelum, dos quais 6 espécimes foram capturados no local usando rede manual. Todos os espécimes capturados eram machos. Esses morcegos foram identificados por suas características faciais únicas, uma folha nasal ereta e alongada, grandes orelhas ovais que se juntam acima da testa e sem cauda. O comprimento médio da cabeça e do corpo dos espécimes capturados foi de 80 mm, o comprimento do antebraço foi de 67 mm, enquanto os comprimentos médios do 3º, 4º e 5º metacarpos foram de 51,73 mm, 55,17 mm e 60,42 mm, respectivamente. O comprimento médio do crânio foi de 29,84 mm, e a largura da caixa craniana, de 12,77 mm. O comprimento médio do pênis de duas amostras foi de 6,6 mm, e o comprimento total do báculo foi de 3,08 mm. Este é o primeiro registro de Megadermalyra no distrito de Jhelum.

Analysis of limb segments length and body proportion of southern Chinese children and adolescents.

AIM: This cross-sectional study was designed to characterize by age the ratios of limb segments length to height and extremities-trunk ratio and body proportions of southern Chinese children. METHODS: Data were collected from students (n = 4715) from five school, aged 6-17 years, in the city of Chongqing. Their standing height, sitting height, arm span, forearm length, upper arm length, leg length, lower leg length, and ratios of extremities to trunk length were determined. RESULTS: Sitting height, forearm length, upper arm length, arm span, and lower leg length were highly correlated with standing height (r > 0.9; P < 0.05). The ratio of extremities to trunk increased till about 13 years of age for both genders. CONCLUSIONS: The length of extremities and their ratio to sitting height reflect regular changes of growth in Chinese children as their age, and limb segments length is highly correlated with height.

Anthropological and perceptual predictors affecting the ranking in arm wrestling competition / Predictores antropológicos y perceptuales que afectan la clasificación en la competencia de fuerza

The purpose of this study was to investigate the predictors contributing to be in the first three places with right and left arm in armwrestling. Seventy-three male senior armwrestlers competed in Turkish National Championship voluntarily participated in this study. Some participants competed with both arms. Two samples were composed of according to the participant competition category, for right (69 participants) and left arm (65 participants). The data were collected from eight different weight classes. Handgrip strength, auditory reaction time, forearm length, and forearm circumference were determined as the predictors. All the measurements were taken after weigh-ins had been done and before the first day of national championship competition. Logistic regression analysis was conducted to predict whether a competitor in armwrestling would be in the first three places either with right or left arm, to be a winner or non-winner. Relative handgrip strength was found a significant predictor for both right and left arm ranking (p < 0.05). Auditory reaction time was found a significant predictor only for right arm ranking (p < 0.05) and forearm circumference was found a significant predictor only for left arm ranking (p < 0.05). These results suggest that strength can be viewed as the main predictor in left arm ranking; however, auditory reaction time is also an important factor to be in the first three places in right arm ranking. Thus, competitors should also focus to improve this perceptual skill.

El objetivo de este estudio fue investigar los predictores que contribuyen a clasificar en los tres primeros lugares en la lucha de fuerza de brazos (vencidas o pulsadas) con el brazo derecho e izquierdo. Setenta y tres hombres luchadores senior compitieron en el Campeonato Nacional de Turquía y participaron voluntariamente en este estudio. Algunos participantes compitieron con ambos brazos. Dos muestras fueron conformadas de acuerdo con la categoría de competencia del participante, para el brazo derecho (69 participantes) y el brazo izquierdo (65 participantes). Los datos se obtuvieron para 8 categorías de peso. La fuerza de prensión, tiempo de reacción auditiva, largo del brazo y circunferencia del antebrazo se determinaron como predictores. Todas las medidas fueron tomadas después de pesaje clasificatorio y antes del primer día de competición. Un análisis de regresión logística se realizó para predecir si un competidor en lucha de fuerza estaría en los tres primeros lugares ya sea con el brazo derecho o izquierdo, para ser un ganador o no ganador. La fuerza de prensión relativa resultó un predictor significativo para la clasificación tanto en el brazo derecho e izquierdo (p <0,05). El tiempo de reacción auditiva se encontró un predictor significativo sólo para la clasificación del brazo derecho (p <0,05) y la circunferencia del antebrazo un predictor significativo sólo para el brazo izquierdo (p <0,05). Estos resultados sugieren que la fuerza puede ser vista como el principal predictor en la clasificación para el brazo izquierdo, sin embargo, el tiempo de reacción auditiva es también un factor importante para estar en los tres primeros lugares de la clasificación para el brazo derecho. Por lo tanto, los competidores también deben centrarse en mejorar esta habilidad perceptual.

Forearm Length Discrepancy in Unilateral Congenital Proximal Radioulnar Synostosis / 대한정형외과학회잡지

PURPOSE: Forearm lengths in cases of unilateral congenital radioulnar synostosis, were analysed radiographically to evaluate the amount of length discrepancy according to different types. MATERIALS AND METHODS: We measured the ulnar length ratio (length of affected forearm/length of unaffected forearm) in 15 cases of uni-lateral congenital radioulnar synostosis. We observed two distinct radiographic patterns. Type I (Lamda type) appeared to be of gamma character grossly, and showed severe radial bowing and a severely hypoplastic radial head. Type II (Chi type) seemed x like in character, showed mild radial bowing and a mildly hypoplastic, or normal radial head. RESULTS: Nine cases were type I and 6 were type II. The ulnar length ratio was 0.89 in type I and 0.98 in type II. Significant differences were formed in the ulnar length ratios between normal subject and type I, and between type I and type II (p<0.05). The equation determined by simple linear regression analysis in a patient of type I, who had been followed for 10 years, was'ulnar length ratio=0.959-0.013 X age (year)'. CONCLUSION: Unilateral congenital radioulnar synostosis can be classified into two types according to radiological morphology. This classification can be helpful in the prediction of forearm length discrepancy, and in the determination of surgical treatment type.