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Tag: "electrical" at biology news

Wisconsin scientists grow critical nerve cells

...otor neurons, according to Zhang, exhibit telltale electrical activity, a sign that the neurons, which normally transmit electrical impulses, were functional. The spinal motor neuron cells have survived in culture in the lab for mo...

Drug That 'Tags' Decision-making Areas Of The Brain May Aid

...teins,called nicotinic receptors, and changing the electrical properties ofthe cell. The human brain coordinates billions of neurons to mediatecomplex behaviors such as an infant learning to recognize his or herparents, a senior citizen learning to play piano, or the process ofaddiction following repetitive exp...

Researchers Uncover Key Step In Manufacture of Memory Protein

...re ready to be secreted. Once the cell receives an electrical signal from another neuron, these vesicles fuse with the cell’s outer membrane, open up, and release mBDNF. During their research, Dr. Loh and her colleagues observed mice genetically incapable of producing CPE. In these mice, proBDNF could not be d...

UCSD team discovers specialized, rare heart stem cells in newborns

...ibited contractility, pumping ability, the correct electrical physiology and normal heart structure. In addition...hboring cardiac muscle cells with resulting normal electrical heart beats. "Another important discovery was the ability to expand the few cells found in a newbor...

Key Trigger Of Opioid Withdrawal Symptoms Found

... the neurotransmitter GABA was responsible for the electrical abnormalities that produce a hyperexcitability in the neurons. Neurotransmitters are the molecular ammunition that one neuron fires at its neighbor to trigger a nerve impulse in the neighbor. Propagation of such nerve impulses through the networks of...

Implanted Devices Detect High-Risk Heart Failure Patients

...rsity Medical Center. Besides maintaining optimal electrical stimulation to the heart, these CRT-D (cardiac resynchronization therapy with defibrillation) devices are giving cardiologists a new view of subtle changes in a key measurement of heart health -- heart rate variability. Patients with little variabili...

Ophthalmologists Use Artificial Silicon Retina Microchip To Treat Vision Loss

...00 microscopic solar cells that convert light into electrical impulses. The purpose of the chip is to replace da...ells of the eye, which normally convert light into electrical signals within the retina. Loss of photoreceptor cells occurs in persons with retinitis pigmentosa (...

Ophthalmologists implant five patients with artificial silicon retina microchip

...00 microscopic solar cells that convert light into electrical impulses. The purpose of the chip is to replace da...ells of the eye, which normally convert light into electrical signals within the retina. Loss of photoreceptor cells occurs in persons with retinitis pigmentosa (...

Supercomputer Dedicated To Bioengineering, Computational Biology Installed

... "For example, our models of the propogation of an electrical impulse thorough the heart wall require us to gene...oengineering researchers this week had modeled how electrical impulses trigger contractions in the heart of a pig. ...

Programmable cells: Engineer turns bacteria into living computers

...things," said Ron Weiss, an assistant professor of electrical engineering and molecular biology. Collaborating with researchers at the California Institute of Technology, Weiss and graduate student Subhayu Basu programmed E. coli bacteria to emit red or green fluorescent light in response to a signal emitted f...

Wisconsin researchers identify sleep gene

...ocess that critically affects, among other things, electrical activity in neurons. A handful of recent studies s...g during sleep and wakefulness as in humans. "The electrical changes in humans look different that they do in flies because our brains are organized differently,...

Researchers discover molecular mechanism that desensitizes us to cold

...d or menthol stimulate this receptor and alter the electrical properties of the membrane, a process that leads to the sensation of cold. When the receptor is stimulated, calcium enters the cell and stimulates the breakdown of PIP2. When PIP2 is broken down, the receptor becomes inactive, thus ending the sensati...

Liposome finding implies electrical effect on cell development

...ve revealed unexpected behavior in the presence of electrical fields that may provide a paradigm-shifting change... in their membranes through the influence of local electrical fields. In particular, the surprising finding of such electrically caused bionanotubule formation ma...

Stem cells from brain transformed to produce insulin at Stanford

...ells respond to external signals by changing their electrical properties and releasing packages of proteins. In the case of islets, that protein is insulin. What's more, some neurons in mice and humans take the first steps toward producing insulin. In insects such as fruit flies, the cells that produce insulin...

Bioelectronic ‘signatures?hold key to DNA mutations

...nanocrystal ?bind to a DNA sample and cause minute electrical current changes in the nanocrystal that can be measured with an electrode. The individual base-conjugated nanocrystals are added sequentially to any DNA sample of interest, generating an electronic “fingerprint?that rapidly identifies all possible co...

Brain-injury rehabilitation depends on acetylcholine circuitry

...ceived a sham injection. The researchers then used electrical probes to create small lesions in the rats' brain region responsible for controlling limb movement. They then gave the rats rehabilitation training. The control group of rats recovered about 55% of the deficit in their reaching ability, while the ra...

After a time-shift, mixed signals from the circadian clock

...t. This results temporarily in bimodal patterns of electrical activity that are generated by the clock within the SCN. Because electrical activity is the output of the circadian clock, the findings suggest that after a significant shift i...

Researchers make surprise discovery that some neurons can transmit three signals at once

... excites a neighboring cell, thereby triggering an electrical discharge and enhancing brain activity, or they di... on the surface of the receiving cell, causing its electrical activity to be enhanced or inhibited. The first week after birth marks a critical phase in the deve...

Brain May Be Less Plastic Than Hoped

... placed tiny electrodes on the cortex and measured electrical activity in the visual cortex; mapping virtually the same cortical quiet zones. The results confirmed the fMRI readings. Smirnakis said it is possible that the visual cortex could reorganize before or after the two- hour to seven-month time frame of...

Discovery clarifies role of peptide in biological clock

...from internal de-synchrony. When they recorded the electrical activity of SCN neurons from these mice, they found that many had lost their beat while others were cycling but unable to synch to each other. But when Herzog and Aton added VIP to the mice cells, the synchronicity was restored, showing that VIP cou...

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