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Tag: "radio" at biology news

Eavesdropping comes naturally to young song sparrows

...r and his colleagues are tracking song sparrows by radio in the field. Preliminary analysis of the tracking data suggests that young birds don’t have many direct interactions with adults, and so are likely to be learning their songs by eavesdropping. When it comes to research about how babies learn lan...

How the brain's backup system compensates for stroke

...ivity. This brain-scanning technique uses harmless radio waves and magnetic fields to measure blood flow in brain regions, which reflects brain activity. The researchers found that the magnetic pulses to the left PMd briefly disrupted the subjects' performance on the task, but that performance quickly r...

Do fruit flies have free will?

...ehavior should resemble random noise, similar to a radio tuned between stations. However, the analysis showed that the temporal structure of fly behavior is very different from random noise. The researchers then tested a plethora of increasingly complex random computer models, all of which failed to adequa...

Tracing broken wiring in stroke patients

...idely used analytical technique, in which harmless radio waves and magnetic fields are used to map oxygen levels in brain regions. By performing FC MRI in patients with spatial neglect, the authors identified regions of the brain where there was a disruption of normal functional brain circuitry. In thei...

Amur leopard still on the brink of extinction, scientists say

... latest techniques such as automatic camera traps, radio tracking, genetic and veterinary research." The census 2007 found 7-9 male leopards, 3-7 females without cubs, 4 females with cubs, 5-6 cubs in all, and 6-8 undefined tracks. Total: 25-34. This compares with 9 males in 2003, 7 females without ...

Studies yield insight into the numerical brain

...ging (fMRI), in which harmless magnetic fields and radio waves are used to measure blood flow in brain regions, which reflects activity. The researchers found that the initial presentation of the numeric stimuli activated the parietal region of the subjects' brains, which subsided as they adapted to the ...

Cells use 'noise' to make cell-fate decisions

Electrical noise, like the crackle heard on AM radio when lightning strikes nearby, is a nuisance that wreaks havoc on electronic devices. But within cells, a similar kind of biochemical "noise" is beneficial, helping cells transform from one state to another, according to a new study led by a UT South...

Groundbreaking Canadian asthma study

...onchial Thermoplasty (BT). The BT device generates radio frequency/thermal energy and reduces areas of underlying smooth muscle in the airways. The procedure is completed in three treatment sessions, each lasting less than one hour, and spaced apart by about three weeks. The procedure, like many other flex...

Does a peptide affect the heart's response to social isolation?

...aced under anesthesia and implanted with wireless, radio frequency transmitters. The animals were subsequen...rt rate and heart rhythms) were recorded using the radio frequency transmitter. Following the period of isolation or pairing, all animals were exposed to a m...

How the brain weaves a memory

...ing (fMRI). This technique involves using harmless radio waves and magnetic fields to measure blood flow to brain regions, which reflects brain activity. As their brains were scanned, the subjects were shown words of different colors and that were located in different quadrants of the display screen. Lat...

Where we change our mind

...al MRI involves using harmless magnetic fields and radio waves to image blood flow in brain regions, which reflects activity. Importantly, Yoshida and Ishii used sophisticated statistical probabilistic analysis of the subjects' movements to overcome a major obstacle to such studies. That obstacle is that ...

The brain's motivation station

...g. In this technique, harmless magnetic fields and radio waves are used to detect regions of higher blood flow in the brain, which reflects higher activity. In the first task, the researchers aimed at identifying the region involved in anticipating rewards. This task involved presenting the subjects with ...

Brain's 'gambling circuitry' identified

...ing different parts of the task. In fMRI, harmless radio signals and magnetic fields are used to measure blood flow in brain regions, which reflects activity in those regions. The researchers concentrated their analysis on the "anticipatory period" between the display of the first and second card, since ...

Pure novelty spurs the brain

...ne was a distinctly novel image. In fMRI, harmless radio signals and magnetic fields are used to measure blood flow in brain regions, which reflects activity in those regions. With this experimental design, the researchers could compare the subjects' response to the different kinds of oddball images to d...

'Genetic network' guards against lethal DNA damage

...M strategy is somewhat like pulling out parts of a radio at random to see what happens, Boeke said. "With ...u might rip out part A or part B and find that the radio still works; but if you pull out both parts and the radio dies you would learn that A and B can comp...

Watching the brain switch off 'self'

...idely used technique, harmless magnetic fields and radio waves are used to scan blood flow in brain regions, which indicates activity. The researchers found that regions of the brain activated during sensory processing or self-reflective introspection were quite distinct and segregated. Sensory processing...

How 'hot' emotional brain interferes with 'cool' processing

...hnique involves using harmless magnetic fields and radio waves to scan the brain to detect levels of blood flow, which indicates increased or decreased brain activity. In earlier studies, the researchers had found that emotional images activated a "ventral affective system" in the brain that encompasses r...

First wolverine radio-collared in Pacific Northwest

...to fit the young female wolverine with a satellite radio collar to initiate the first scientific study of w...tissue samples for genetic analyses, and install a radio collar to report her movements to Aubry via satellite for the next 18 months. "With this technology...

Infection 'alarm' yields clues to immune system behavior

...F molecule, which sounds the alarm, as a very weak radio transmitter. It moves very slowly as it carries it...t pick up this signal act like extremely sensitive radio receivers. They can pick up the alarm message from exposure to even a very small amount of TNF. This...

Superconducting magnet attracts molecular research

...d at a site protected from large metal objects and radio frequency interference, the superconducting behemoth was actually energized with about the same amount of power consumed by a big stereo, Pochapsky explained. First, the superconducting electric coils that create the magnetic field were bathed in l...

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