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Tag: "stimulation" at biology news

Old memory traces in brain may trigger chronic pain

... dark chamber. “Their aversive reaction to the stimulation disappeared,” Apkarian said. Based on the animal results, the next step will be to test the drug in clinical trials, Apkarian said. “When we do this in a clinical trial, we expect people to say I still have the pain, but it’s not bothering me...

Studies to find better ways to preserve human eggs, ovarian tissue under way

...motherapy, you often don’t have time to go through stimulation cycles to get oocytes,” says Dr. Emmi. “You are concentrating on getting rid of cancer cells.” Also, if a woman has breast cancer, for example, hormones needed to induce ovulation could be problematic because many breast cancer cells have estrogen re...

Nurtured chimps rake it in

Human interaction and stimulation enhance chimpanzees’ cognitive abilities, according to new research from the Chimpanzee Cognition Center at The Ohio State University. The study (1) is the first to demonstrate that raising chimpanzees in a human cultural environment enhances their ...

Researchers identify protein pathway involved in Parkinson disease development

...ine. This lowering of dopamine leads to decreased stimulation of the brain's motor cortex. Although scientists have not known the exact cause of the loss of these dopamine-producing neurons, they believe it is related to dysfunctional mitochondria and oxidative stress. Mitochondria are the cell's "power plants...

Gene therapy study shows safety and statistically significant improvement in Parkinson's disease

...s where reducing STN activity by either electrical stimulation or lesioning can help ameliorate the symptoms of advanced Parkinson’s disease. The Phase 1 study was not specifically designed to assess efficacy. Nonetheless, the researchers reported the clinical outcomes to be very encouraging, with treated pat...

Common treatment for methamphetamine overdose may damage brain cells

...ne suspect the damage results from the exaggerated stimulation of cells by the amino acid glutamate, which proves toxic to cells producing the neurotransmitter gamma-aminobutyric acid (GABA). Their results are published in the May 30 issue of The Journal of Neuroscience . "This work in laboratory animals rai...

How brain pacemakers erase diseased messages

...,000 Americans, the mechanisms by which deep brain stimulation alleviates disease symptoms aren't well understood...sity's Pratt School of Engineering have found that stimulation administered by rapid-fire electrical pulses deep in the brain produces what they call an "informati...

Hearts of male and female rainbow trout are different

...ate levels and females would benefit more from the stimulation of PDH than males. The study also sought to de...prepared in one of two ways: (1) incubated without stimulation (i.e., ventricle strips were incubated in a respiration cell containing an oxygenated buffer solutio...

Revealing the machinery underlying the 'plastic' juvenile brain

...d. For example, children deprived of normal visual stimulation during an early critical period of the first few y... genes. The researchers also found that the visual stimulation activated genes known to regulate the transcription of other genes. Transcription is the process of ...

Sandia researchers take new approach to studying how cells respond to pathogens

...- one for trapping and imaging viable cells during stimulation with pathogens. The other combines cell preparation steps, cell selection and sorting followed by analysis of protein content in the selected cell subpopulations. "In effect, we are taking many work-horse technologies such as confocal microscopy, ...

Wired for sound: How the brain senses visual illusions

...ow physiological evidence that visual and auditory stimulation might not be processed separately, then merged together, as previously assumed, but that an almost-simultaneous integration of the sensations may actually take place in the brain." The UCSD scientists measured event-related potentials (ERPs), brai...

New mechanism for nutrient uptake discovered

...ed to find that the pores simply can't act without stimulation from their neighbors." In earlier research the Carnegie scientists, with colleagues, identified the genes responsible for initiating nitrogen uptake in plants. That identification has helped other researchers find the relatives of these genes in a...

Penn study on olfactory nerve cells shows why we smell better when we sniff

...ent." Researchers tested two different types of stimulation on olfactory neurons in mice: chemical stimuli, such as those used in making perfumes that have almond-like and banana-like scents, and mechanical stimuli, that is pressure carried by air flow to the nostrils while breathing. The group did this fi...

Twin studies reveal genetic components leading to cardiac and kidney disease

...associated with the adrenergic system. Adrenergic stimulation is what is involved in the 'flight or fight' response, and results in an increased heart rate, sweating, and increased blood pressure. Evidence emerging from the twin studies uncovered links between the adrenergic system and inflammation, suggesting ...

Brain networks strengthened by closing ion channels

...of norepinephrine. Treatments for ADHD all enhance stimulation of the norepinephrine receptors. These new data also have important implications for the researchers' studies of more severe mental illnesses like schizophrenia and bipolar disorder, which can involve mutations of a molecule called DISC1 (Disrupte...

Engineering the heart piece by piece

...ble of generating pulsating forces and reacting to stimulation more like real muscle than ever before. Previously, the group described the results of a self organization strategy, showing that it was possible to engineer heart muscle that closely resembles normal heart muscle physiology without any synthetic...

MIT: Pulsing light silences overactive neurons

...searchers can now exert exquisite control over the stimulation and inhibition of individual neurons. Learning more about the neural circuits involved in epilepsy could help scientists develop devices that can predict when a seizure is about to occur, allowing treatment (either shock or light) to be administer...

'Hidden-hero' microbes in soil, water may help naturally clean toxic sites

...ting a natural method called bioremediation -- the stimulation of naturally occurring microbes that Kostka calls "hidden heroes" -- to promote bacterial growth in the soil subsurface that scrub it of potentially deadly radioactive metal. If bioremediation proves successful on the uranium, technetium, nitrate ...

The great escape -- fleeing fish fall in line

...s mimicked an aerial predator attack by mechanical stimulation and used a high speed camera to record responses in schools of ten grey mullet each. Individuals within a school were then ranked according to the timing of their escape. The experiment was performed ten times at 10 minute intervals on a total of s...

New fMRI technology making brain tumor surgery safer

...eons traditionally have applied a small electrical stimulation with a wand-like instrument during surgery. If a m...ple, the patient’s hand will move. Electrical stimulation has had drawbacks, however. “Stimulating the brain with an electrode can cause a seizure,?Dr. McPher...

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