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Tag: "behaviors" at biology news

New collaborative research reveals chimpanzees can sustain multiple-tradition cultures

...ty. In the wild, however, it is difficult to prove behaviors are passed on by observation and learning. In this study, members of the international collaborative research team taught forms of tool use and food extraction techniques to high-ranking individuals in four different captive chimpanzee communitie...

Undergraduate research shows leaderless honeybee organizing

...rge organized groups where highly developed social behaviors coordinate the efforts of thousands of individual...ular, the importance of two communication-related behaviors known as the “vibration signal” and “worker piping.” Different from the famous “waggle dance” th...

Research finds that circadian rhythms dominate all life functions

...gulate timing for most physiological functions and behaviors such as sleeping, eating and activity. As a checks-and-balances procedure, Ptitsyn analyzed the sets of data with several mathematical approaches to achieve the same results. The research also shows that gene oscillation is significantly more organ...

Prey not hard-wired to fear predators

... Notes on the Study The study compared the behaviors of four species of prey animals in three different prey situations: Locations were native predators still exist. (Eastern Siberia, Boreal Canada and Alaska) Locations where the top predators no longer exist. (the polar islands of Gr...

How the brain's backup system compensates for stroke

...ctivity increase was functionally specific for the behaviors governed by the PMd and not simply a general increase in brain activity. The researchers also established that the activity increase in the right PMd caused the recovery of performance. When they also used magnetic pulses to disrupt the right PMd ...

Gene malfunctions cause schizophrenia, depression symptoms in mice

... Similarly, the other mutant mouse strain showed behaviors that reflected depressive symptoms. These symptoms could be alleviated by an antidepressant, found the researchers. Both types of DISC1 mutant mice exhibited the same kind of reduced brain volume seen in people with schizophrenia and depression, t...

Cancer patients monitor fatigue in real time

...plants using a method successfully used to monitor behaviors such as smoking cessation and alcohol use. The method is called "ecological momentary assessment" (often referred to as real-time assessment), which provides an instant measurement of patients' fatigue. Clinicians and researchers usually rely o...

Female-led infanticide in wild chimpanzees

...s are neither the result of isolated, pathological behaviors nor the by-product of male aggression, but instead appear to represent part of the female behavior repertoire in chimpanzees. What drives the behavior is not yet clear, but may stem from demographic shifts that alter sex ratios and put increased p...

New study examines 'brain's own marijuana'

...ng of how endocannabinoid moderates stress-related behaviors and how stress and stress hormones activate the endocannabinoid system. Haj-Dahmane and his co-investigator, Troy Wood, Ph.D., will examine the relationships between stress, stress-related behavior and addiction using a combination of electrophysio...

In young mice, gregariousness seems to reside in the genes

...ents have been studied primarily in the context of behaviors associated with sexual reproduction, territorial defense and parental care. Those studies, say Lahvis and Panksepp, do not account for the many forms of social interaction that occur prior to sexual maturity, nor do they account for the many kinds of...

Good behavior, religiousness may be genetic

...s study shows that religiousness occurs with these behaviors also because there are genes that predispose them to it." "There is, of course, no specific gene for religiousness, but individuals do have biological predispositions to behave in certain ways," says Koenig. "The use of twins in the current study ...

Mimicking how the brain recognizes street scenes

...which could be used to filter videos for anomalous behaviors ?or for smarter movie editing. ...

Gene variations contribute to aggression and anger in women

...iversity of Pittsburgh researchers have found that behaviors such as anger, hostility and aggression may be genetic, rooted in variations in a serotonin receptor gene. Indrani Halder, Ph.D., of the Cardiovascular Behavioral Medicine Program at the University of Pittsburgh, will present the findings today at th...

Long-term narcotics use for back pain may be ineffective and lead to abuse

...rs at Yale School of Medicine, who also found that behaviors consistent with opioid abuse was reported in 24 percent of cases. "Patients with chronic back pain commonly request pain medication, and opioid medications are used despite the concerns clinicians have with patients developing an addiction to these...

Morphine makes lasting -- and surprising -- change in the brain

...he reward system that reinforces survival-boosting behaviors such as eating and sex ?a reward system linked to addiction. The affected synapses, Kauer found, were those between inhibitory neurons and dopamine neurons. In a healthy brain, inhibitory cells would limit the release of dopamine, the "pleasure chemi...

Army research mission focused on autism

...function operating optimally, many of the residual behaviors we see in children with autism decrease significantly." Reynolds speaks from experience. With biomedical and behavior intervention, her son is now a well-functioning 11 year old. "We were lucky to find what worked best for him," she said. "I ha...

Circumcision: A proven strategy to prevent HIV

...cised men in our study did not increase their risk behaviors after circumcision. In fact, all men in the trial increased their condom use and reduced their number of sexual partners." The authors conclude that circumcision will be most effective if it is integrated with other prevention and reproductive hea...

MIT: Pulsing light silences overactive neurons

...h brain regions and neurons contribute to specific behaviors or pathological states, Boyden said. The halorhodopsin gene was originally discovered in the 1980s, but Boyden didn't think its full potential had been explored. The protein expressed by the gene turned out to have exactly the right characteristic...

Smokers quit after damage to brain region

...t also raises the possibility that other addictive behaviors may have an equally strong hold on neural circuits for pleasure. The senior authors of the study are Antoine Bechara and Hanna Damasio, both faculty in the year-old Brain and Creativity Institute at the University of Southern California, in collabo...

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

... were isolated from their families, they displayed behaviors similar to depression and cardiovascular changes indicating a possible increased risk of heart disease (including elevated resting heart rate, reduced heart rate variability, and reduced parasympathetic regulation of the heart). This study exami...

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