|
|||
|
Search Result for: stimuli Funny
These goats are...special. They have an "illness" that causes them to faint in response to a stimuli: excitement, fear, and so on, and it is seen in dogs and humans too. They are bred specially for this quality, because you can catch them very easy. Cool !
Tech
A really cool technology innovation from Japan. A robotic exoskeleton, that senses the neural stimuli transmitted from the brain to the muscles and acts accordingly. The result? A robotic enhancement, that allows you to lift up to 10 times the normal weight. It can be really useful on construction sites!
Technology and Health News
The brain responds to stimuli, tactile and visual contradiction in delaying the processing of information that comes from the skin.
A fly is laying on the right elbow. Slight itching, moving vision towards the elbow, identification of the intruder and its position and, finally, blow. This reaction is not as instantaneous as you can imagine. Indeed, the brain seems to delay affixed aware of the tactile perception, as reported a study in Current Biology Group for Research in Cognitive Neuroscience (Grnc) in Barcelona.
The brain is often having to generate rapid responses integrating stimuli that produce information in contradiction: if, for example, the subject has crossed his arms and brings his right arm on the left side and left arm on the right side, his hands will be in a position that is reversed from the original location. In this case, the brain must be able to correctly integrate the information of the tactile stimulus (for example pinch) on the right hand, although the visual stimulus comes in fact from the left. To avoid mistakes the brain needs time to make a realignment of the information space of two different maps: that rof the body and one that covers everything else.
To understand how the mechanism works, researchers have assessed the response of 32 university students to a series of visual and tactile stimuli. Each student has been subjected to 600 tests. "First we asked participants to cross the arms, so that the position of hands was in conflict with the anatomical position" says Salvador Soto-Faraco, one of the authors of the study, "we have stimulated one of two hands." Few tenths of a second later, a small light (visual stimulus) I had left or right. Both the tactile stimuli that those visual products were in a totally random. In addition, the flash of light could be generated 60 or 200 milliseconds after the tactile stimulus. In order to assess whether the time elapsed between the two stimuli does influence or not the answer.
The ventral striatum, a part of the brain already known to be associated with rewards and unexpected stimuli, is the center of our desire for adventure. The research in Neuron.
A group of researchers from the Wellcome Trust Centre for Neuroimaging at the University College of London has identified the area of the brain directly linked to our desire for adventure. Or, more precisely, our propensity to live new experiences and to experience what we do not know.
For the study, published in Neuron, researchers have developed a test: the participants were presented a series of images associated with different sums of money put into a premium, and were asked to guess which of the sums was higher. Although the volunteers easily could identify the image associated with richer rewards, when it was introduced a new figure, all of them tended to choose the latter rather than those already known with secure profits. Through magnetic resonance imaging, neuroscientists have noticed that the area of the ventral Striatum (an area of the brain already known to be associated to receive a reward and unexpected stimuli) was particularly active when participants opted for the novelty.
In these monkeys 80 per cent of the neuron cell cortex is multisensory phonetic and also responds to visual stimuli. Thus, all the information is integrated
It is known for some time that monkeys are able to integrate information in various ways to recognize monkeys in the group and their intentions, just like us and like many other other animals. What we did not know until today was how our "cousins" could associate verses and faces, optimising thus the process of individual recognition. The experiment helps to clarify that which was published in Journal of Neuroscience and was conducted by Aif Ghazanfar and collaborators at Princeton (USA) on a kind of macaco. The researchers found that, in these monkeys, many neurons are in fact multi-sensorial and respond differently depending on whether the hearing and visual stimuli are at the same time or not.
For monkeys, which live in social groups and must manage complex relationships - conflicting and friendly - it is crucial to combine auditory stimuli (leading information-type sound, as a sound threat) and images (which provide summary information, such as the color of skin or facial features).
The group Ghazanfar could shed light on the mechanism of integration of different stimuli by measuring the activity of visual and auditory cortex areas of the brain, respectively, for image and sound. Measurements were made under different conditions: in one case the animals could both see fellow companions in the group, listen to their sounds, while in other cases the animals could alternatively listen to the auditory component only or see the companions (only visual component).
The rodents, as primates, are able to learn simple abstract principles for later use in different situations...
A long considered exclusive to primates appears in reality shared by other species. Having already been demonstrated in some birds in fact, the ability to apply abstract rules just learned, and to to adapt to new situations was also observed in mice. The study, published in a number of Science, was conducted by Robin Murphy of University College London.
The experiments were carried out by subjecting the animals to visual and acoustic stimuli. In the first phase mice, divided into three groups, have responded to three different sequences of visual stimuli, consisting of the sequence of light and dark. For each group only a sequence was associated with the food. After an initial period of "training", the mice were able to distinguish between those identifying sequences associated with reward.
|
SearchAboutFunny, cool and sexy videos, totally free and with quality content, to help you get rid of that free time at work ;)
Be the first to laugh, RSS us: Category
Previous
![]() |
||
![]() Powered by mBlog ©2005-2006, C97.net - All Rights Reserved Contents ©2007, Cool Stuff | Contact us here| |
|||
![]() |
|||