Estrogen may dictate what problem-solving strategy brain uses
...in uses to solve problems. According to a study of rats published in the June issue of Behavioral Neurosci... hormone learned a place-oriented task faster than rats not getting it, but those not on estrogen were faster completing a response-driven task. These task...First report of stem cell signal of intention to become specific neuron
...f stem cells that, when grafted into the brains of rats with a Parkinson's like disease, developed into healthy dopamine neurons. This effectively cured the animals' severe Parkinsonian symptoms. The ability to clone large numbers of stem cells that would become neurons also has the potential to revolut...Yale researchers report on brain activity believed related to sudden infant death syndrome
...y, the researchers were able to show in laboratory rats that serotonergic neurons are located right next to large arteries in the brain, where they are ideally situated for sensing carbon dioxide levels in arterial blood. Thus, their location is optimized for their function as chemoreceptors. Richerson sa...Stanford researcher dusts off old drug; uncovers new anti-rejection properties
...ring the late 1980s, Morris transplanted hearts in rats using sirolimus to prevent rejection. Not only did the rats avoid rejection problems, but the hearts that received sirolimus had much cleaner blood vessels than...The brain risks of binge drinking
...d at humans who have been alcoholic for decades or rats treated with alcohol for six to 18 months," said F...an due to irreversible damage. Male Sprague-Dawley rats (n=120) were surgically implanted with intragastric catheters. Experimental rats (n= 80) were given...Medieval black death not bubonic plague
...ous die-offs of rats. There are no reports of dead rats in the streets in the 1300s of the sort common in more recent epidemics when we know bubonic plague was the causative agent, says Wood. Instead of being spread by animals and insect vectors, the researchers believe that the Black Death was transmitte...Alcohol and nicotine: A deadly duo
...hould be emphasized that we are extrapolating from rats to humans. Nonetheless, said David Overstreet, ass...nicotine/alcohol interaction observed by Tizabi in rats that have been chronically treated with nicotine and/or alcohol? Overstreet proposed that individua...UT Southwestern researchers identify mechanisms by which cocaine elevates blood pressure
...sure is based on evidence from previous studies in rats and mice, said Dr. Meryem Tuncel, lead author of the study and a postdoctoral fellow in hypertension. However, anesthesia used to sedate these animals interferes with the effects of cocaine on the central nervous system, and it is very difficult to s...Rare form of meningitis contracted in Jamaica
...tbreak, A. cantonensis has been identified in both rats and land snails in Jamaica, which supports the hyp... regions, because A. cantonensis has been found in rats in Cuba, Puerto Rico, the Bahamas, the Dominican Republic and Jamaica, as well as in New Orleans. J...Multimillion-dollar pain research center funded at Wake Forest
...e humans, will abuse narcotics such as heroin, but rats that have experienced nerve injury that results in sensitivity to light touch have a much lower potential to abuse heroin that they are self-administering for their pain. A fourth laboratory project will study that phenomenon and try to determine wha...Rat makes a partial recovery following a spinal cord lesion
...ve developed an experimental therapy which enables rats with a spinal cord lesion to partially recover fro...voluntary movement are severed. In both humans and rats the result is a paralysed lower body. In rats the result is partially paralysed rear legs. After the...Using cocaine during pregnancy may damage developing fetuses, causing lifelong learning disabilities
...esearch involved administering cocaine to pregnant rats and then assessing short term memory in the offspring when they were adolescents and adults. The test animals were placed in a cage with two identical objects. They were then removed from the cage for a brief interval, and then put back in with one o...Stroke news tips for Friday, Feb. 8, 2002
...ional recovery. Viagra was administered orally to rats for six days after stroke. At 28 days, the number of new brain cells was significantly higher in rats treated with Viagra. Rats that received two milligrams (mg) of Viagra showed 237.27 millimeters squ...Brown researchers find new photoreceptor and visual system in the eye
...injected a fluorescent dye into the tiny part of a rats brain that governs the 24-hour clock cycle. The dye traveled back to the new photoreceptors in the eye. The researchers then found the dye-filled cells, recorded their electrical activity, and found that they continued responding to light whether or ...Research shows way to boost morphine's pain-killing benefits
...l test of analgesic effect is to test a laboratory rats heat sensitivity to a few-second exposure to a bea...urning laser light directed at the tail. Normally, rats actively flick their tails when they feel the heat. Rats given morphine showed much less sensitivity...First report on sublethal effects of smoke available from NIST
...y for relating smoke lethality data for laboratory rats to incapacitation data for people; a look at how various sizes of fires may produce smoke yields leading to sublethal health effects; and state-of-the-art information on the production of the condensed components of smoke from fires and their changes...New antimalaria drug succeeds in first animal tests
... the drug's effectiveness and toxicity in mice and rats compared favorably to results from another water-soluble candidate for malaria treatment. That other drug is under development at the U.S. Walter Reed Army Institute of Research. "There are some aspects where the Army's compound is better, and som...Polymer could allow oral delivery of insulin to diabetics
...ults of the Purdue polymer material on roughly 150 rats and dogs show that up to 16 percent of the insulin delivered makes it to the bloodstream. This is a major improvement over the 0.01 percent bioavailability, or active insulin, that was being reported until now, says Peppas. Foss says he plans to make...Antioxidant herbal extract may help prevent and treat reflux oesophagitis
...s experimentally induced reflux oesophagitis in 60 rats and subsequently examined tissue samples for signs of ulceration and/or healing. Fifteen rats were given no treatment. The rest were either treated with a commonly prescribed acid suppressant dr...New research shows even a single drug exposure can alter brain function
...sion in the ventral tegmental area of the brain in rats and mice. The increase in synaptic currents that ...he changes that were observed in the brains of the rats and mice may be important not just for the early stages of addiction, but also may help explain the ...