Influence of Abdominal Hollowing Maneuver on the Core Musculature Activation during the Prone Plank Exercise

This cross-sectional study of repeated measures investigated whether integrating the abdominal hollowing maneuver (AHM) into the prone plank performance is an effective strategy for increasing both the activation of the deep and superficial core musculature. Electromyographical (EMG) responses of rectus abdominis (RA), external oblique (EO), internal oblique (IO), and lumbar erector spinae (LES), and ratings of perceived exertion (RPE) of 20 participants (13 male, 7 female; mean ± standard deviation (SD) age: 24.25 ± 3.54 years; body mass: 66.42 ± 8.40 kg; height: 1.70 ± 9.51 m) were compared across two experimental conditions: the traditional prone plank (STANDARD); and a variation including the AHM (HOLLOWING). Regarding Total Intensity, HOLLOWING resulted in significantly greater EMG response than STANDARD (p < 0.001; Effect size (ES) = 3.01). Specifically, RA showed no significant differences between STANDARD and HOLLOWING (p = 0.056; ES = 0.285). However, for the remaining analyzed muscles, HOLLOWING significantly provided higher EMG activation compared to STANDARD (LES: p = 0.004; ES = 0.619; left EO: p < 0.001; ES = 1.031; right EO: p < 0.001; ES = 1.419; left IO: p < 0.001; ES = 2.021; right IO: p < 0.001; ES = 2.269). Regarding RPE, HOLLOWING reported values significantly greater than STANDARD (p < 0.001; ES = 2.94). In conclusion, integrating the AHM into the prone plank exercise enhances overall abdominal activity, particularly in both obliques. These findings provide updated guidelines for lumbar stabilization and core strengthening in health-related physical fitness programs.This research was funded by Consellería de Educación, Investigación, Cultura y Deporte de la Generalitat Valenciana, and European Social Fund (European Union), grant project number ACIF/2016/048

Human Head Natural Protection Against Electromagnetic Fields

In this paper we provide concluding evidence that the human skull acts as a dynamic barrier to electromagnetic fields (EMF) and temperature flow at 1800 MHz. This natural helmet e®ectively and dynamically protects brain tissue against safety-de¯ned threshold temperature increase due to external EMF induction. A half-wavelength dipole antenna has been employed as the EMF source. The human head is modelled by several coronal planes extracted from the Visible Human Project. Results described here have a great importance should thermal e®ects be directly used to derive basic restrictions to EM fields safety limits for human exposure.FUNDACIÓN SENECA. Plan de Ciencia y Tecnología de la Región de Murcia. Código: 05746/PI/07

The Effect of Cranio-Cervical Position on Core Muscle Activation during the Prone Plank Exercise

This study aimed to investigate the influence of head position on the electromyographical activity of the core muscles during the prone plank exercise. Twenty healthy participants were enrolled in this study. Muscle activation was registered using surface electromyography in the rectus abdominis, external oblique, internal oblique, and the lumbar portion of erector spinae. Three plank conditions were randomly evaluated, varying the position of the cranio-cervical segment during the plank performance (neutral, flexion and extension). The activation of each individual examined muscle and the overall core muscle activity (Total Intensity), as well as the ratings of perceived exertion were analysed with statistical significance set at p 0.90). The rectus abdominis presented larger activation in flexion compared to the other variations (p 0.70). Flexion elicited a greater response for both sides of external oblique when compared to neutral and extension, and also for both sides of internal oblique compared to the other conditions (p 0.70). Both flexion and extension reported higher exertion rating values compared to neutral (p 0.90). Head position influenced the electromyographical activation of core musculature, showing highest values when performing the plank in a head flexion.This research was funded by Consellería de Educación, Investigación, Cultura y Deporte de la Generalitat Valenciana, and European Social Fund (European Union), Grant Project Number ACIF/2016/048

Una nueva subespecie de Moricandia moricandioides (Boiss.) Heywood (Brassicaceae).

A new subspecies of Moricandia moricandioides (Boiss.) Heywood (Brassicaceae). Palabras clave: Moricandia, Brassicaceae, Murcia, España.Key words: Moricandia, Brassicaceae, Murcia, Spain

Advances in mode-stirred reverberation chambers for wireless communication performance evaluation

Reverberation chambers (RC) are a popular tool for laboratory wireless communication performance evaluation, and their sandardization for Over-The-Air (OTA) measurements is underway. Yet, the inherent limitations of singlecavity RCs to emulate isotropic Rayleigh-fading scenarios with uniform phase distribution and high elevation angular spread put their representation of realistic scenarios into jeopardy. Recent advances in the last few years, however, have solved all these limitations by using more general mode-stirred reverberation chambers (MSC), wherein the number of cavities, their stirring and coupling mechanisms, and their software postprocessing algorithms is far from simple, representing a new era for wireless communications research, development, and over-the-air testing. This article highlights recent advances in the development of second-generation mode-stirred chambers for wireless communications performance evaluatio

Application of the 3D slicer software in the study of the brain's ventricular system

[EN]We present a technological process based on the 3D Slicer software for the three-dimensional study of the brain’s ventricular system with teaching purposes. It values the morphology of this complex brain structure, in any spatial position or as a whole, being able to compare it with pathological studies where its anatomy visibly changes. This will lead to a better understanding of the ventricle’s anatomy and radiology. We assess the potential this software has for processing radiological images, taken from Magnetic Resonance serial sections and the three-dimensional reconstruction of anatomical structures

Bases psicopedagógicas del nuevo modelo didáctico para la enseñanza de las ciencias y de la ingeniería en el espacio europeo de educación superior

La aplicación de los criterios que derivan del marco formativo que establece y desarrolla el Espacio Europeo de Educación Superior, hace necesario el empleo de un nuevo modelo didáctico cuya aplicación requiere importantes modificaciones metodológicas en la práctica del proceso instructivo. La necesidad de una docencia centrada en el alumno, promoviendo aprendizajes activos, la oportunidad de una actuación del profesor como guía de la adquisición de conocimientos, mediante un proceso de instrucción compartido entre el profesor y el alumno, la necesidad de una nueva organización de las actividades de enseñanza aprendizaje y la búsqueda y el empleo de nuevos recursos docentes, son algunas de estas implicaciones metodológicas. Partiendo de la premisa de que todo modelo educativo tiene sus bases teóricas en las aportaciones de las teorías de aprendizaje, se analiza, en esta comunicación, como las bases psicopedagógicas que proporcionan las teorías psicológicas de aprendizaje subyacen en los principios metodológicos que el Nuevo Paradigma para la Educación Superior aporta a los procesos de enseñanza-aprendizaje de la ciencia y de la ingeniería, identificándose además algunas pautas de actuación para la puesta en práctica de ese muevo modelo didáctico

Adiciones a la flora de Murcia. II

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The role of polarization diversity for MIMO systems under rayleigh-fading environments

Polarization diversity techniques have not received as much attention as others due to the significant difference in mean signal level between copolarized and cross-polarized branches when one polarization is transmitted. However, multiple- input–multiple-output (MIMO) systems where the multipath fading is only partially correlated could use polarization diversity to provide a high diversity gain. Hence there is a need to fully understand the role of true polarization diversity in such systems. In this letter, progressive (true) polarization diversity performance for 3 3 MIMO systems under Rayleigh-fading environments is evaluated through simulations and measurements. True polarization diversity was found to be as significant as spatial diversity at improving diversity gain, and hence MIMO system capacity.This work was supported in part by Fundación Séneca, the R&D coordinating unit of the Autonomous Region of Murcia (Spain) under project reference 2I05SU0033. The authors wish to thank Bluetest AB for its generous educational discounting