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Tag: "navigate" at biology news

Migratory songbirds have a specialized night-vision brain area

...s. They believe the area might enable the birds to navigate by the stars, and to visually detect the earth's m...atory birds need to see where they fly, as well as navigate by stars and the earth's magnetic field. Surprisingly, Jarvis said, recent scientific evidence has s...

3D Atlas Will Help Navigate The Spinal Cord

...such research because it will permit scientists to navigate seamlessly between the rat and human spinal cords to test hypotheses inspired by human considerations and relate data from experiments in animals back to humans. The proposed description of the structure of the spinal cord will be based on a compreh...

Displaced songbirds navigate in the high Arctic

...researchers have gained new insight into how birds navigate in the high Arctic. In particular, the findings aid our understanding of how birds might determine longitudinal information--a challenging task, especially at the earth's poles. The work is reported in Current Biology by Susanne kesson and colleagu...

Bacteria which sense the Earth's magnetic field

...up" from "down" in the Earth's magnetic field, and navigate themselves confidently through layers of water to efficiently find optimal growth conditions. The magnetosomes are made of tiny crystals of the magnetic iron mineral magnetite (Fe3O4) -- only about 50 nanometres in size (one nanometre = one millionth...

Recreating 'Flowers for Algernon' with a happy ending

...ned the mice to memorize spatial clues in order to navigate a water maze and swim to a platform. The normal animals learned to find the platform in seven days; the NF1 mice took 10. After receiving statins, the NF1 mice outraced the normal mice. Third, Lee tested coordination by training the mice to b...

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

...her animals. Bats use echolocation to identify and navigate their environment by emitting calls and listening to the echoes that return from various objects. Zook believes the touch-sensitive receptors on bats' wings work in conjunction with echolocation to make bats better, more accurate nocturnal hunters. ...

Worms know bad food when they smell it

...ise to design a more complex maze for the worms to navigate through, allowing them to choose from several varieties of bacteria. "Now we could do things like compare the good bacteria they know and the bad bacteria they know to two completely unfamiliar bacteria that they've never seen before," Bargmann expla...

Leave it to salmon to leave no stone unturned

... the bane of boaters who, even with boats meant to navigate in shallow waters, can find their vessels grounded. Smaller species of salmon that spawn at higher densities are capable of even more widespread tilling, according to Moore, who has for six summers worked with sockeye salmon through the UW's Alaska ...

Contaminants linked to sturgeon decline in Columbia river

... salmon, the bottom-dwelling white sturgeon rarely navigate dams successfully making it difficult for them to expand their habitat or access oceanic food sources. Schreck and Feist studied white sturgeon from three reservoirs along the Columbia River and from areas downstream of Bonneville, the last dam on t...

Anti-inflammatory drug's potentially deadly side effect found to be rare

...gainst those icebergs and have to work out ways to navigate around them." ...

Long-term changes in experience cause neurons to sprout new long-lasting connections

...the whiskers is vitally important for mice as they navigate their environment. Consequently, a significant portion of the mouse's brain is devoted to processing input from whiskers. To monitor changes in neuronal structure visually, the researchers used a novel technique that Svoboda's team had developed ear...

MIT 'seeing machine' offers hope to blind

... written that way." They also used the machine to navigate through a virtual environment, raising the potential for "previewing" unfamiliar buildings a person wants to visit. Goldring explained that visually challenged people are often terrified of going to new places. "There's a fear of missing simple vis...

New GI technologies improve internal organ visualization

...y, doctors use a scope fitted with two balloons to navigate the entire small bowel. When inflated with air, the balloons can expand sections of the small intestine to allow the camera a closer examination. In the multicenter study, DBE was conducted in 130 patients. Of these patients, 115 had previously u...

Discovery of agile molecular motors could aid in treating motor neuron diseases

...otors are surprisingly flexible and agile, able to navigate obstacles within the cell. These observations coul...called actin. This flexibility could help myosin V navigate crowded regions of the cell where the actin filaments criss-cross and where other cellular component...

Robots manipulating animal behaviour

...ed walls, the robots move, turn and stop. They can navigate their way safely by avoiding the walls, obstacles or each other, follow the walls, congregate around a lamp beam or even line up. When placed in the same area with cockroaches, the robots quickly adapt their behaviour by mimicking the animals' moveme...

The secret lives of sea slugs

...xperimentation." The observations that sea slugs navigate with respect to water flow and direction based on odor and other cues will inspire further studies of this behavior and aid scientists studying the nerve cells involved in navigation, an important problem every animal faces. "Once you know what a b...

Where we change our mind

...ions as the subjects made a series of decisions to navigate their way to a specified goal. Functional 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...

Protowings may have helped bird ancestors cover rough terrain

...wings to improve hindlimb traction and thus better navigate steep slopes and obstructions. By using their protowings in this way, they would presumably have had an advantage when pursuing prey and escaping from predators. Dial and colleagues performed experiments on several species of juvenile galliform (ch...

Mayo Clinic study suggests that a central nervous system viral infection can lead to memory deficits

...at contracted the virus had difficulty learning to navigate a maze designed to test various components of spatial memory. The degree of memory impairment, which ranged from no discernable damage to complete devastation, was directly correlated to the number of dead brain cells in the hippocampus region of the...

Like a snail through the intestinal canal

... The intestines are an extremely difficult area to navigate through with a medical device. Yet, many people need to have intestinal examinations done to determine if, for example, they have intestinal cancer. The medical device currently used for this is the colonscope, a long, thin and flexible tube that cau...

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