Tag: "memories" at biology news

Duke Ecologist Says Logging Is Creating 'Mahogany Deserts'

...nyou take me there?'" She also used local people's memories to datethe ages of post-disturbance trees. Like Sherlock Holmes, the fictional detective about whom Snook read avidlywhile at Grinnell, she collected multiple clues to unravel the mystery. Hurricanes periodically blow through Yucatán forests...

10,000-Year-Old Clues Suggest Future Forest Changes

...ed cedars in coastal rain forests may only be fond memories in B.C.'s not-too-distant future, according to SimonFraser University biology professor Dr. Rolf Mathewes. By studying the past in the form of pollen and other plant remains, Mathewes has gained valuable insights into what the future might hold. "We ...

Plants get the message, too

...ing a role in everything fromacquiring and storing memories to possibly contributing to certain mental healthailments. Past research has detected signs of glutamate overload in thepost-mortem brains of people with schizophrenia, and faulty glutamate signalinghas also been linked to Alzheimer's disease. Glutam...

Wolf Prize In Medicine Awarded To Kandel, Columbia's Pioneer Of Memory Research

... Professor Kandel went on to find that long-term memories cannot formwithout the activation of genes that pr...s, the Kandel lab found that formation oflong-term memories is normally restrained by a series of inhibitory processesthat determine the ease with which short-t...

New Clues To Evolution Of Human Brain

...revealed that the process of retrieving short-term memories offaces shares the same physical mechanism in the brain as that for retrievinglong-term memories of faces -- forcing yet another wedge into the mysteries ofconsciousness. "It's great uncharted ter...

Astrobiologist to hunt small game in Siberia

...e, it's cold, and the very name carries unpleasant memories of prisoncamps. But it's also an ideal place to look for life-forms that have learnedsurvival tricks that might be in use on the permafrost and polar caps of Mars,Europa, Callisto and other icy moons of the solar system. Richard Hoover, of NASA's Mar...

Scientists create smart mouse

...ion in memory research. Many scientists argue that memories arecreated when two neurons form a strong connection, called long-term potentiationor LTP. Others believe LTP is not necessary for learning. Tsien's work "is oneof the best pieces of evidence so far" in favor of the LTP model, Stevens said,because ac...

Hormonal recall

Oestrogen gives women's memories a real boost WOMEN deprived of oestrogen suffer from memory lapses that vanish when thehormone is replaced, a Canadian expert has found. Her findings are a convincingdemonstration that oestrogen has a beneficial effect on cognitive circuits inthe ...

Scientists discover addition of new brain cells in highest brain area

...ually all theories of learning and memoryhold that memories are formed by modifications at the synapse, which is thetransmission junction between neurons. On the basis of the new findings, it isnow conceivable that the introduction of new neurons into the circuitry of thebrain may play a role in memory. Goul...

Exercise improves learning and memory

...involved in the formation and storage of long-term memories by humans and animals. "Presumably, LTP affects the flow of information through synapses, the connections between two nerve cells," said Sejnowski. Neurons communicate with each other by sending signals through synapses. Examination of the tissue sli...

Human stem cell research leads Science's top ten list of the best scientific advances in 1999

... methods to film neurons laying the groundwork for memories and gained new insight into the molecules and steps involved in the process. The power of these interactions was dramatically demonstrated when scientists genetically engineered a strain of mice that produced an abundance of one such molecule and wer...

Drosophila genome sequence completed

...crashing into walls, has tissues, nerves, muscles, memories and other kinds of complicated behaviors like circadian rhythms. The take-home message is that the higher complexity in animals like flies and humans comes without needing a lot of new parts. You can build them with the same parts listwith more of th...

The power of the mother-child bond

...s not a pleasant experience for them." "Specific memories may be generated in relation to alcohol," added Ju...d. "Some of our oldest and most emotionally laden memories are associated with odors. Odors take us to our past." Mennella described a study conducted at her...

Memory mechanism found at nerve cell connections in the brain

...the brain, a process that leads to the creation of memories and their long-term storage. The increase or decrease in strength among synapses, and subsequent changes in memory, are based on sensory-driven experiences. Synaptic strengthening or weakening also occurs during t...

UNC-CH researchers to study social effects of N.C. hurricane

...torical record. Such personal stories record vivid memories and present history to the public in new ways. Without historians' efforts, the stories preserved on tape and in transcripts would eventually be lost. "Voices after the Deluge" will build on the UNC-CH Southern Oral History Program's recent survey o...

Gene found responsible for social amnesia

... the oxytocin gene is necessary for forming social memories -- allowing you to recognize an individual you've seen before. The gene has no apparent influence on spatial or other types of memory. The study demonstrates that social memory has a neural basis distinct from other forms of memory, and someday cou...

Parents' escape drinking evokes children's negative response to alcohol smell

...nnection between the olfactory and limbic systems, memories evoked by odors are more emotionally charged than those evoked by other sensory stimuli," according to Dr. Mennella. Unlike sensory systems for sight, hearing, taste, and touch, the olfactory system has direct links with the emotional centers of the ...

Instant replay: study finds potential mechanism for building long-term memory

...ey mechanism the brain uses to transfer short-term memories into permanent storage, a finding that could have ... the brain maintains a continuity of knowledge and memories over a lifetime despite the constant turnover of molecules and proteins. The insight also may one da...

How much of the world do we really see?

... filling in the gaps using memory," he says. "Such memories can be created based on beliefs and expectations." Ronald Rensink of the University of British Columbia in Vancouver believes that our impression of a rich visual world comes from our building internal representations, though he accepts that the...

Study: living near where pesticides used may boost fetal death due to birth defects

...sticide use was objective, not relying on people's memories of what they might have been exposed to," Hertz-Picciotto said. Researchers tapped information about dates, locations and amounts of chemicals applied by air or ground equipment resulting from the California law requiring that all restricted pes...

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