"Exergames" para la mejora de la salud en niños y niñas en edad escolar: estudio a partir de hábitos sedentarios e índices de obesidad / «Exergames» to improve the health of school children: study of sedentary lifestyle and obesity rates
Follow Dos científicos suecos del Instituto Karolinska y de la Universidad de Uppsala han desarrollo un sistema de puntuación (score) para ser utilizado por personas con edades entre los 40 y 70 años que puede predecir su riesgo de morir en los próximos 5 años. Este trabajo acaba de ser publicado en la revista The …
Follow Obesidad, Diabetes 2 e inflamación sistémica. Existe una fuerte relación entre la obesidad y la diabetes tipo 2, enfermedades metabólicas caracterizadas por la resistencia a la insulina e inflamación de bajo grado (crónica). La obesidad es considerada como una enfermedad inflamatoria crónica, de intensidad leve. En el año 2006, la revista Nature publicó un …
Mariano Fernandez S.'s insight:
La obesidad es considerada como una enfermedad inflamatoria crónica, de intensidad leve.
Scientists at Karolinska Institutet have managed to build a fully functional neuron by using organic bioelectronics. This artificial neuron contain no ‘living’ parts, but is capable of mimicking the function of a human nerve cell and communicate in the same way as our own neurons do.
Neurons are isolated from each other and communicate with the help of chemical signals, commonly called neurotransmitters or signal substances. Inside a neuron, these chemical signals are converted to an electrical action potential, which travels along the axon of the neuron until it reaches the end. Here at the synapse, the electrical signal is converted to the release of chemical signals, which via diffusion can relay the signal to the next nerve cell.
To date, the primary technique for neuronal stimulation in human cells is based on electrical stimulation. However, scientists at the Swedish Medical Nanoscience Centre (SMNC) at Karolinska Institutet's Department of Neuroscience in collaboration with collegues at Linköping University, have now created an organic bioelectronic device that is capable of receiving chemical signals, which it can then relay to human cells.
“Our artificial neuron is made of conductive polymers and it functions like a human neuron”, says lead investigator Agneta Richter-Dahlfors, professor of cellular microbiology. “The sensing component of the artificial neuron senses a change in chemical signals in one dish, and translates this into an electrical signal. This electrical signal is next translated into the release of the neurotransmitter acetylcholine in a second dish, whose effect on living human cells can be monitored.“
Background and Aims Proton pump inhibitors (PPIs) have been associated with adverse clinical outcomes amongst clopidogrel users after an acute coronary syndrome. Recent pre-clinical results suggest that this risk might extend to subjects without any prior history of cardiovascular disease. We explore this potential risk in the general population via data-mining approaches. Methods Using a novel approach for mining clinical data for pharmacovigilance, we queried over 16 million clini
The medical field seeks to use social media to deliver health interventions, for example, to provide low-cost, self-directed, online self-help groups. However, engagement in online groups is often low and the informational content may be poor.The specific ...
Follow ¿Que yo me contradigo? Pues sí, me contradigo. Y ¿qué? (Yo soy inmenso, contengo multitudes.) En Hojas de Hierba, Walt Whitman nos regala las frases inspiradoras de este nuevo artículo relacionado con la exploración de nuestra compleja vida interior. Muchas veces al día nuestras voces internas nos dan cuenta de los múltiples seres que …
Mariano Fernandez S.'s insight:
¿Que yo me contradigo? Pues sí, me contradigo. Y ¿qué? (Yo soy inmenso, contengo multitudes.)
Evolutionary biologists have long wondered why the eardrum—the membrane that relays sound waves to the inner ear—looks in humans and other mammals remarkably like the one in reptiles and birds. Did the membrane and therefore the ability to hear in these groups evolve from a common ancestor? Or did the auditory systems evolve independently to perform the same function, a phenomenon called convergent evolution? A recent set of experiments performed at the University of Tokyo and the RIKEN Evolutionary Morphology Laboratory in Japan resolves the issue.
When the scientists genetically inhibited lower jaw development in both fetal mice and chickens, the mice formed neither eardrums nor ear canals. In contrast, the birds grew two upper jaws, from which two sets of eardrums and ear canals sprouted. The results, published in Nature Communications, confirm that the middle ear grows out of the lower jaw in mammals but emerges from the upper jaw in birds—all supporting the hypothesis that the similar anatomy evolved independently in mammals and in reptiles and birds. (Scientific American is part of Springer Nature.) Fossils of auditory bones had supported this conclusion as well, but eardrums do not fossilize and so could not be examined directly.
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