Empresas, Colegios, Psicoterapia, Programas de Reducción de Estrés

miércoles, 17 de agosto de 2011

7 ways Video Games Reward the Brain

Tom Chatfield provides an overview of how games stimulate brain reward processing. Chatfield is game enthusiast who edits the arts and books section of the UK magazine, Prospect.  Here are my notes from the TED video.

 
Chatfield begins by stating he is in awe of the power of virtual games to transfix us.

Video gaming is the fastest growing of all forms of media ($50 billion per year).

People spend enormous time and money on virtual game rewards.  Farmville has over 70 million players around the world.

The good news is this gaming teaches us about brain rewards.

Video games produce huge data sets of reward processing.

We have evolved in special ways. Here are seven ways games teach us about brain rewards.

1. Measuring progress aids reward-games use constant score updating to reward players
2. Multiple long and short-term gains--by adding complexity, gamers are less likely to become bored
3. Reward for effort-every time you get something for effort, negative feedback is not very helpful
4. Feedback is frequent, rapid and clear
5. Element of uncertainty- uncertainty of reward is a neurological and psychological gold mine.  Dopamine is the brain's reward learning chemical and is released more with unexpected reward
6. Windows of enhanced engagement-in gaming, developers use moments of enhanced memory and increased confidence
7. Social interaction-playing with other people enhances reward and is more likely to keep gamers involved in the game
These principles have implications in business.  Real time energy meters could provide immediate feedback on progress in saving energy.

Implications are important for education.  We can use game technologies to enhance learning.

Finally, in government we may learn how to reward people to change complex behaviors and combat problems like obesity.

Games teach us the the key role of engagement--how to keep people involved in tasks to promote individual and social engagement.  If we can learn from how games promote engagement, we may have something very revolutionary.

Chatfield has written a book titled Fun, Inc where he outlines how virtual games can be a good place to learn new approaches in the real world.

Chatfield is on to an important issue here.  Why can't we take some of the principles of popular games and apply them to things like learning algebra or organic chemistry?  So far, educational software has not progressed at the speed or complexity of video gaming.  Perhaps by learning how gamers are rewarded and engaged in virtual reality games we can provide more effective online educational software.

martes, 16 de agosto de 2011

Big Dinosaurs, Small Brains

The Tyrannosaurus Rex has always gotten a bad rap. It is portrayed as a bully in the blockbuster film Jurassic Park, people joke about its short arms, and many assume it had a pea-sized brain inside its head.
It turns out that sauropods should be the butt of our jokes, at least the ones about brain size. Sauropods, as I learned at the American Museum of Natural History’s “World’s Largest Dinosaurs” exhibit, had tiny brains even relative to other dinosaurs. These giant dinosaurs (for the less nerdy readers, sauropods include brachiosaurus and other “really long-necked” dinos) had a gland responsible for secreting hormones relating to growth that made up as much as 10 percent of their brain volume. The gland certainly did its job, but it helps explain why the overall brain size wasn’t much larger than a dog’s brain, despite its massive body.

Sauropods, like stegosaurus and many other species, were herbivores. Simply put, they didn’t have to be very smart because their food wasn’t trying to escape (although greater intelligence probably would have helped them avoid becoming another dinosaur’s food). T. Rex, on the other hand, was a hunter. While research suggests it was not intelligent by any means—its powerful jaws were its greatest asset and took up a lot of head room—it did have a large olfactory lobe and a well developed inner ear. In other words, T. Rex’s sense of smell and hearing were probably strong.
Even so, large dinosaurs likely only had several billion neurons in their brains, while humans have 100 billion. Our minds are obviously capable of much higher levels of thought, but given what many carnivores like T. Rex had to compute while chasing prey, they needed more powerful brains than the sauropods. Now if you want to talk about arm size…

Original article belongs to: Andrew Kahn

Un estudio vincula la religiosidad con el lóbulo temporal derecho del cerebro

Las investigaciones sobre las lesiones cerebrales proporcionan un conocimiento único sobre el funcionamiento de la mente. Si el comportamiento humano se ve modificado por daños en alguna región del cerebro, eso implica que dicha región tiene una función particular, que puede definirse.

Existe una lesión cerebral que consiste en la atrofia de los lóbulos temporales, que son regiones del cerebro situadas aproximadamente detrás de cada sien y que se cree están implicadas en tareas visuales complejas, como el reconocimiento de caras; que son el "centro primario del olfato" del cerebro y, también, que regulan ciertas emociones como la ansiedad, el placer o la ira.

Un estudio reciente sobre esta lesión de los lóbulos temporales, realizado por el neurólogo del Institute of Neurology de Londres, Dennis Chan, ha revelado que, además, uno de estos lóbulos podría estar vinculado con la religiosidad humana.



Según publica la revista Epiphenom, se trataría del lóbulo temporal derecho. La atrofia de este lóbulo temporal concreto se produce raramente, y consiste en que la mayoría del lado derecho del cerebro simplemente se “marchita”.

Chan y sus colaboradores compararon a veinte pacientes con esta atrofia cerebral particular con otros veinte pacientes que presentaban el mismo tipo de lesión, pero en el lóbulo temporal izquierdo.
Ambos grupos de individuos presentaban problemas psicológicos serios, derivados de sus lesiones cerebrales. Sin embargo, en ambos casos los síntomas no eran los mismos.

Esta diferencia radicaría en que el hemisferio cerebral izquierdo controla el habla y la mano diestra. Las lesiones en esta parte del cerebro se notan, por tanto, enseguida. Por el contrario, la atrofia del lóbulo temporal derecho es más sutil.

Los enfermos que la padecen se pierden fácilmente, tienen dificultades para reconocer caras, y presentan una serie de trastornos de comportamiento, como la desinhibición o la obsesión.

“Hiperreligiosidad” y aumento de la espiritualidad

En el caso de los veinte individuos con atrofia del lóbulo temporal derecho estudiados, se demostró, además, que dos de ellos tenían alucionaciones visuales con objetos inanimados y otros dos experimentaban las señales recibidas por uno de sus sentidos como captadas por otro sentido diferente.

Además, tres de ellos eran “hiperreligiosos”. En el caso de la otra veintena de pacientes, ninguno presentó esta característica. Los resultados de esta investigación han sido publicados por la revista Brain.

Las lesiones en la parte derecha del cerebro habían sido vinculadas anteriormente con la religiosidad. En un estudio publicado en 2008, y realizado por científicos de la University of Missouri-Columbia, en Estados Unidos, se estableció que los daños en los lóbulos parietales de dicho hemisferio cerebral propiciaban que la gente que los padecía puntuara más alto en mediciones estándar sobre su espiritualidad.

En este caso, fuero analizados 26 adultos con lesiones cerebrales traumáticas en estas áreas del cerebro.

El lóbulo parietal derecho está relacionado con la conciencia del yo en referencia a otros objetos en el espacio, con la conciencia del yo tal y como lo perciben otros en situaciones sociales y con la capacidad de evaluar de manera crítica las capacidades propias.

Región parietal posterior y autotrascendencia

Por otra parte, un estudio publicado por la revista Neuron en febrero de 2010 y realizado por científicos de la Universidad de Udine, reveló a principios de 2010 que los tumores situados en las zonas parietales posteriores del cerebro también provocan rápidos cambios relacionados con la religiosidad.
Esta investigación reveló que, en personas que sufrían tumores cerebrales, sólo aquéllas a las que se les extirparon tumores de las zonas parietales posteriores del cerebro vieron modificados sus niveles de “autotrascendencia”, que es una de las tres dimensiones del carácter que, según la psicología, agrupa las características de espiritualidad, misticismo, pensamiento mágico y religioso, así como la visión de uno mismo como parte integral del universo.

La autotrascendencia, en definitiva, nos hace sentirnos como una parte integral del universo y, desde el punto de vista científico, sirve para medir el comportamiento espiritual de cada individuo.

Religión y cerebro

Desde hace unos años, y gracias a los avances tecnológicos alcanzados, que permiten el registro de a actividad neuronal del cerebro, la neurociencia ha intentado explicar la religiosidad y la espiritualidad humanas desde una perspectiva puramente fisiológica.

Así, por ejemplo, en investigaciones neurológicas recientes se han descubierto las zonas del cerebro implicadas en las experiencias místicas e, incluso, se ha llegado a crear un mapa que definiría el “cerebro místico”.

Estos avances abren un interesante debate sobre si estos descubrimientos pueden considerarse una demostración de la existencia de Dios o, por el contrario, constatarían únicamente que la experiencia religiosa es tan sólo un producto más de la actividad cerebral del ser humano.


(Artículo Propiedad de Yaiza Martinez)

lunes, 15 de agosto de 2011

Why It's Hard For Kids to Stand Still

Researchers from France were surprised to find that children ages 7-10 had a harder time standing still when compared to older children (12-15) or adults due to immaturity in their sensory readjustment systems (proprioceptive weighting).

The visual system also contributes significantly to postural balance, so don't be surprised if kids with visual problems have problem standing (or sitting) still too.

Hmm. Makes you think about  what we're expecting of young kids and when educational or behavioral expectations will catch up to developmental science.




Photo : rocket ship from Flickr

vía: eideneurolearning

Children of Depressed Mothers Have a Different Brain: MRI Scans Show Their Children Have an Enlarged Amygdala

Researchers think that brains are sensitive to the quality of child care, according to a study that was directed by Dr. Sonia Lupien and her colleagues from the University of Montreal published in the Proceedings of the National Academy of Sciences. The scientists worked with ten year old children whose mothers exhibited symptoms of depression throughout their lives, and discovered that the children's amygdala, a part of the brain linked to emotional responses, was enlarged.


Similar changes, but of greater magnitude, have been found in the brains of adoptees initially raised in orphanages. Personalized attention to children's needs may be the key factor. "Other studies have shown that mothers feeling depressed were less sensitive to their children's needs and were more withdrawn and disengaged," explained Drs. Sophie Parent and Jean Séguin of the University of Montreal's, who followed the children over the years.
Scientists have established that the amygdala is involved in assigning emotional significance to information and events, and it contributes to the way we behave in response to potential risks. The need to learn about the safety or danger of new experiences may be greater in early life, when we know little about the world around us. Indeed, studies on other mammals, such as primates, show that the amygdala develops most rapidly shortly after birth. "We do not know if the enlargement that we have observed is the result of long-term exposure to lower quality care. But we show that growing up with a depressed mother is associated with enlarged amygdala."
"Having enlarged amygdala could be protective and increase the probability of survival," Lupien said. The amygdala may be protective through a mechanism that produces stress hormones known as glucocorticoids. The researchers noted that the glucocorticoids levels of the children of depressed mothers who participated in this study increased significantly when they were presented with unfamiliar situations, indicating increased reactivity to stress in those children. Adults who grew up in similar circumstances as these children show higher levels of glucocorticoids and a greater glucocorticoid reaction when participating in laboratory stress tests. "What would be the long term consequences of this increased reactivity to stress is unknown at this point."
Although this study cannot clarify the causes of enlarged amygdala, the researchers note that the adoption studies have also shown that children who were adopted earlier in life and into more affluent families than others did not have enlarged amygdala. "This strongly suggests that the brain may be highly responsive to the environment during early development and confirms the importance of early intervention to help children facing adversity," Lupien said. "Initiatives such as prenatal and infancy nurse home visits and enriched day care environments could mitigate the effects of parental care on the developing brain." Séguin adds, "Future studies testing the effects of these preventive programs and observational studies involving children exposed to maternal depressive symptoms at different ages, and consequently for different lengths of time, should provide more insight into how this occurs, its long term consequences, and how it can be prevented."
This study was published in the Proceedings of the National Academy of Sciences on August 15, 2011, and was financed in part by the John D. and Catherine T. MacArthur Foundation, the Canadian Institutes for Health Research, and Fonds de recherche en santé du Québec. The University of Montreal is officially known as Université de Montréal.

Exercise May Help Prevent Brain Damage Caused by Alzheimer's Disease

Regular exercise could help prevent brain damage associated with neurodegenerative diseases like Alzheimer's, according to research published this month in Elsevier's journal Brain, Behavior, and Immunity







"Exercise allows the brain to rapidly produce chemicals that prevent damaging inflammation," said Professor Jean Harry, who led the study at the National Institute of Environmental Health Sciences in the United States. "This could help us develop a therapeutic approach for early intervention in preventing damage to the brain."
Previous research has already demonstrated that exercise after brain injury can help the repair mechanisms. This new study shows that exercise before the onset of damage modifies the brain environment in such a way that the neurons are protected from severe insults. The study used an experimental model of brain damage, in which mice are exposed to a chemical that destroys the hippocampus, an area of the brain which controls learning and memory. Mice that were exercised regularly prior to exposure produced an immune messenger called interleukin-6 in the brain, which dampens the harmful inflammatory response to this damage, and prevents the loss of function that is usually observed.
Pharmacological therapies to downregulate inflammation and address cognitive decline in older adults, and those with Alzheimer's disease, have been less successful. This research helps understand how exercise could be used to affect the path of many human conditions, such as neurodevelopmental disorders and neurodegenerative diseases. In addition, as a chemical model of neuronal damage was used, it also raises the possibility that exercise could offer protection against the potentially harmful effects of environmental toxins.
"This elegant series of experiments reveals an alternative pathway by which voluntary physical exercise may protect hippocampal neurons," said Dr. Ruth Barrientos from the Department of Psychology and Neuroscience at the University of Colorado. "The study on the role of exercise as a therapeutic intervention will undoubtedly get a workout in the years to come. Perhaps the greatest challenge with this line of research will not be more discoveries of compelling evidence of the anti-neuroinflammatory effects of exercise, but instead, getting humans to exercise voluntarily and regularly."
The research was funded by the Division of Intramural Research, National Institute of Environmental Health Sciences, and the National Institutes of Health.

Via: sciencedaily

Los colores no existen

El cielo es azul, el atardecer naranja... ¿verdad? Los colores que usted ve no son siempre los mismos que los que ve otra persona, pues percibimos el color a través de nuestro cerebro, según le explicó a la BBC el neurocientífico Beau Lotto.


http://www.bbc.co.uk/mundo/noticias/2011/08/110809_colores_ver.shtml