feedback 2 2

Tag: "feedback" at biology news

Biotechnology's newest chemical tool

...his hand into the nervous system, allowing sensory feedback from the hand to reach the brain, and instructions to come from the brain to control the hand, at least in part. Coordinated by Professor Paolo Dario with Professor Maria Chiara Carrozza leading the development of the hand, the project united resear...

Researchers learn how blood vessel cells cope with their pressure-packed job

...orientation of actin fibers can be thought of as a feedback control in which the external stresses imposed on ...entify other proteins that may be involved in this feedback control mechanism." ...

Brains response to visual stimuli helps us to focus on what we should see, rather than all there is to see

...raction is necessary, Callaway says, or a positive feedback of chemical signals across neuronal synapses would result in a myriad of disorders, including epilepsy. They simultaneously measured activity in both a specific type of inhibitory neuron, called fast-spiking, and a neighboring excitatory neuron. The...

Cyberkinetics, Case to develop system to help restore extremity function

...nt and day-to-day changes in the user's body via a feedback method that can adjust the stimulation so that it accomplishes the desired movement. Some FES systems are currently available to consumers, others are undergoing clinical evaluation, and many are still in development. In the future, neuroprosthetic...

Max Planck researchers make a breakthrough in plant stem cell research

...ute for Developmental Biology have now uncovered a feedback mechanism, involving a growth-enhancing hormone an...n hormonal regulation: they are part of a negative feedback loop, by which the growth-inducing plant hormone cytokinin limits its own influence. The study shows...

Bats use touch receptors on wings to fly, catch prey, study finds

...f the air. These receptor cells give bats constant feedback about their wing positions," said Zook, who has studied bats for more than 30 years, focusing on echolocation and the bat auditory system. The bat's sense of touch has been a side interest since the early 1980s. To test his hypothesis, Zook removed...

Scientists crack code for motor neuron wiring

... firing patterns and sensory neurons that transmit feedback information on muscle action. The research team, which was led by HHMI investigator Thomas M. Jessell, published its findings in the November 4, 2005, issue of the journal Cell. Jessell collaborated on the studies with HHMI research associate Jeremy...

Ultrasounds show mothers' drinking shrinks fetal brain

...xposure in animals and humans. "The provision of feedback on fetal development as revealed in ultrasonography may be a strategy to encourage heavy drinkers to seek treatment during pregnancy," concludes the study. CDC would like to see intervention efforts start even earlier. "The best opportunity to ident...

University of Utah to help build bionic arm

...ly, says Clark, "this new arm will provide sensory feedback to make the arm feel like a person's own arm. Existing prosthetic arms are so hard to use, and feel so unnatural, that sometimes people just don't use them. They put them on the closet shelf." How the Funding Will Work The initial two-year phase ...

Both alcoholism and chronic smoking can damage the brain's prefrontal cortex

...ly, says Clark, "this new arm will provide sensory feedback to make the arm feel like a person's own arm. Existing prosthetic arms are so hard to use, and feel so unnatural, that sometimes people just don't use them. They put them on the closet shelf." How the Funding Will Work The initial two-year phase ...

Cheaper and simpler keyhole surgery

... expensive and do not provide the required (force) feedback to the surgeon. The aim of Joris Jaspers' research project was to develop simple mechanical alternatives to these complex robotic systems, and also to test them. Jaspers is a doctoral student at the department of Mechanical Engineering of Delft Univ...

USC, Rice to develop bacteria-powered fuel cells

...e of the hallmarks of our approach is the vigorous feedback between our computer models and our laboratory work," said Lüttge. "The computer simulations help us perform better experiments, and the laboratory tests help us design better simulation, and the overall combination saves time and money." In additio...

New brain hormone puts brakes on reproduction

... produced along the "reproductive axis" acting via feedback loops to keep the body's hormones within the optim...own production of pituitary hormones, establishing feedback that keeps the body's sex hormones on an even keel. Estradiol also works higher in the brain, on th...

First demonstration of 'teaching' in non-human animals

...We also believe that true teaching always involves feedback in both directions between the teacher and the pup...ndem leaders and tandem followers shows the mutual feedback between them: if the gap between them gets too large, the leader decelerates and the follower accele...

Oops! Researchers publish new findings on the brain's response to costly mistakes

...ore confusing than others. They received immediate feedback telling them if they were wrong or too late in responding. "In general, the response to a mistake that cost them money was greater than the response to other mistakes, and the involvement of the rACC suggests the importance of emotions in decision ...

Novel connection found between biological clock and cancer

...the intricate web of clockwork genes, proteins and feedback loops that drive circadian rhythms, working chiefly in the classic genetic model organism Neurospora, the common bread mold. One gene (period-4) was identified over 25 years ago by a mutation that affects two clock properties, shortening the circadi...

Study finds how organs monitor themselves during early development

... In biological terms this question could involve a feedback loop that lets the body check in on itself and then act on that information. Although feedback loops are essential and they abound in biology, they aren't well understood. Feedback loops enable a...

MIT 'seeing machine' offers hope to blind

... and more. Recently the machine received positive feedback from 10 visually challenged people with a range of... in part because it doesn't include the diagnostic feedback of the SLO. The new seeing machine also replaces the laser of the SLO with light-emitting diodes, an...

Invasive species alter habitat to their benefit

...lts suggest that invasive cattails set in motion a feedback loop that helps them gain a stronghold. "The invasive cattails change the ecosystem through litter accumulation, producing an environment in which native plants don't perform well but the invaders do," said Farrer. "As the environment changes, the ca...

Brain-computer link lets paralyzed patients convert thoughts into actions

...ued to aid the clinical team in producing valuable feedback concerning the BrainGate technology. The second patient, a 55-year-old man with a similar injury, had the sensor implanted by surgeons at the University of Chicago in April 2005 and was followed by researchers from the Rehabilitation Institute of C...

1 2 3 4