Until very recently he worked as a teacher and he still shudders at the memories. Perhaps there are some memories so painful that you have to blot them out. A2 [ C usually singular , U ] the part of a computer in which information or programs are stored either permanently or temporarily , or the amount of space available on it for storing information :.
My computer has a gigabyte of memory. Computer hardware. Idioms from memory. She has vivid memories of her trip to Los Angeles 20 years ago. There has been a dramatic drop in price for computer memory and storage. See also flash drive.
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Examples of memory. Such studies have been very useful in mapping the cognitive architecture of human short-term memory to specific brain regions. From Cambridge English Corpus. Or, adopting a distributed point of view, conceptual representations of verbs may share fewer meaning elements in a bilingual's memory than those of nouns.
These examples are from the Cambridge English Corpus and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
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Obviously that leads you back into the past, into memory , into repressed emotions. If the results indicate neither memory nor symbolic play deficits, then further consideration of the executive dysfunction hypothesis is warranted. The answer should provide an evaluation of the role of memory in the symbolic deficits found in children with autism.
Likewise, because a memory is declarative does not mean that it is symbolic or propositional. At the physiological level, both depressive symptoms and deficits in deep memory processes may be associated with decreased prefrontal metabolism. Relation of prefrontal cortex dysfunction to working memory and symptoms in schizophrenia. Executive functions and working memory : theoretical and measurement issues.
A Successful Artificial Memory Has Been Created
What makes students tick: working memory and look-up behaviour. In the language of neural networks, the ' network ' here is trained to have one dominant memory. Attentional processes are sufficient for associative memory and learning to occur. Memory was included in the model because the four tasks all involved memory learning. Double dissociations of memory and executive functions in working memory tasks following frontal lobe excisions, temporal lobe excisions or amygdalo-hippocampectomy in man.
We used tasks that measure speed of information processing as well as tasks that measure non-speed related memory processes. See all examples of memory. Translations of memory in Chinese Traditional. Need a translator? Translator tool. What is the pronunciation of memory?
Browse memorization. Test your vocabulary with our fun image quizzes. Image credits. Word of the Day slash. Read More. This study is remarkable because it demonstrates that by manipulating specific circuits in the brain, memories can be separated from that narrative and formed in the complete absence of real experience. The work shows that brain circuits that normally respond to specific experiences can be artificially stimulated and linked together in an artificial memory. That memory can be elicited by the appropriate sensory cues in the real environment. The research provides some fundamental understanding of how memories are formed in the brain and is part of a burgeoning science of memory manipulation that includes the transfer, prosthetic enhancement and erasure of memory.
These efforts could have a tremendous impact on a wide range of individuals, from those struggling with memory impairments to those enduring traumatic memories, and they also have broad social and ethical implications. In the recent study, the natural memory was formed by training mice to associate a specific odor cherry blossoms with a foot shock, which they learned to avoid by passing down a rectangular test chamber to another end that was infused with a different odor caraway.
The caraway scent came from a chemical called carvone, while the cherry blossom scent came from another chemical, acetophenone.kinun-mobile.com/wp-content/2019-12-23/pyzo-the-best-phone.php
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The researchers found that acetophenone activates a specific type of receptor on a discrete type of olfactory sensory nerve cell. They then turned to a sophisticated technique, optogenetics, to activate those olfactory nerve cells. With optogenetics, light-sensitive proteins are used to stimulate specific neurons in response to light delivered to the brain through surgically implanted optic fibers. In their first experiments, the researchers used transgenic animals that only made the protein in acetophenone-sensitive olfactory nerves.
By pairing the electrical foot shock with optogenetic light stimulation of the acetophenone-sensitive olfactory nerves, the researchers taught the animals to associate the two. When they later tested the mice, they avoided the cherry blossom odor.
These first steps showed that the animals did not need to actually experience the odor to remember a connection between that smell and a noxious foot shock. But this was not a completely artificial memory, because the shock was still quite real. In order to construct an entirely artificial memory, the scientists needed to stimulate the brain in such a way as to mimic the nerve activity caused by the foot shock as well. Earlier studies had shown that specific nerve pathways leading to a structure known as the ventral tegmental area VTA were important for the aversive nature of the foot shock.
To create a truly artificial memory, the researchers needed to stimulate the VTA in the same way as they stimulated the olfactory sensory nerves, but the transgenic animals only made the light-sensitive proteins in those nerves. In order to use optogenetic stimulation, they stimulated the olfactory nerves in the same genetically engineered mice , and they employed a virus to place light-sensitive proteins in the VTA as well. They stimulated the olfactory receptors with light to simulate the odor of cherry blossoms, then stimulated the VTA to mimic the aversive foot shock.
The animals recalled the artificial memory, responding to an odor they had never encountered by avoiding a shock they had never received. For a long time, it has been a mystery how memories are formed in the brain—and what physical changes in the brain accompany their formation.
In this study, the electrical stimulation of specific brain regions that led to a new memory also activated other brain regions known to be involved in memory formation, including an area called the basolateral amygdala. Because nerve cells communicate with one another through junctions called synapses, it has been assumed that changes in synaptic activity account for the formation of memories. In simple animals, such as the sea slug Aplysia , memories can be transferred from one individual to another using RNA extracted from the one who experienced them.
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The RNA contains the codes for proteins made in the nerves of the animal associated with the memory. This process is similar to the new report described here, in that stimulating the electrical activity of specific neural circuits is used to elicit a memory. In the case of memory transfer, that pattern came from trained animals, whereas in the optogenetics study, the pattern of electrical activity associated with the memory was built de novo within brain of the mouse.