Pharmed Fish
A study presented at an American Chemical Society meeting reveals that fish from sites in various parts of the country tested positive for drugs and personal care product chemicals that wind up in the water supply.

60-Second Science from Scientific American podcasts
26 March 2009

Women experiencing physical abuse from intimate partners spent 42 percent more on health care per year than non-abused women, according to a long-term study of more than 3,000 women. And the costs don't end when the abuse does. The study revealed that women who suffered physical abuse five or more years earlier still spent 19 percent more per year on health care than women who were never abused. "Along with all the physical and emotional pain it causes, domestic violence also comes with a substantial financial price," said Amy Bonomi, co-author of the study and associate professor of human development and family science at Ohio State University.

The study is the largest to date to examine health care costs and utilization based on the timing and type of domestic violence that women suffer, Bonomi said. The study, co-authored with researchers from the Group Health Cooperative and the University of Washington in Seattle, was published online this week in the journal Health Services Research. It will appear in an upcoming print edition.

The research examined data from 3,333 randomly selected women who belonged to Group Health, a health care system in the Pacific Northwest. Women in the study were surveyed about whether they experienced any physical or emotional abuse from intimate partners and if so, when it occurred. Researchers then studied patterns of health care use and costs by the women over an 11-year period, from 1992 through 2002.

"We were able to track health care costs for quite a long time, giving us a good picture of how much domestic violence is actually costing our health care system," Bonomi said. Women experiencing ongoing physical abuse had the highest health care costs -- 42 percent higher than non-abused women. "It's likely that these women need more health care because they are seeking care for immediate injuries and associated health problems," Bonomi said. Women who had been physically abused within the last five years, but not currently, had 24 percent higher yearly health costs. Abuse that occurred more than five years ago resulted in 19 percent higher costs.

The study separately examined women who experienced psychological abuse, which included verbal threats and chronic controlling behavior. Those suffering psychological abuse within the past five years, but not currently, had yearly health care costs that were 33 percent higher than those of non-abused women. "It's possible that it takes additional time for women with psychological abuse to seek care for their experiences," Bonomi said.

Another striking finding was that all abused women, whether they experienced physical or psychological abuse, used significantly more mental health services than non-abused women, Bonomi said. Women suffering ongoing physical abuse were about 2.5 times more likely to visit a mental health provider in the past year than were non-abused women. The rate for psychologically abused women was two times higher. "This lends support to the idea that mental health providers should always ask women about their abuse history when they first come in for treatment," Bonomi said.

But mental health was just one of several areas in which abused women used more services. Physically abused women used significantly more primary care, pharmacy, specialty care, laboratory and radiology services. For psychologically abused women, more services were needed in specialty care, pharmacy, and radiology.

Group Health, the health care system whose members were surveyed for the study, provides health and insurance services to more than 500,000 people in the Pacific Northwest.

A Brown University-led research team has documented for the first time how bats land. The results are surprising: Not all bats land the same way. The findings, which appear in the Journal of Experimental Biology, could offer new insights into how the second-largest order of mammals evolved.

PROVIDENCE, R.I. [Brown University] — People have always been fascinated by bats, but the scope of that interest generally is limited to how bats fly and their bizarre habit of sleeping upside down. Until now, no one had studied how bats arrive at their daytime perches.

A Brown University-led research team is the first to document the landing approaches of three species of bats — two that live in caves and one that roosts in trees. What they found was surprising: Not all bats land the same way.

“Hanging upside down is what bats do,” said Daniel Riskin, a postdoctoral researcher in the Ecology and Evolutionary Biology department at Brown and lead author on a paper published in the Journal of Experimental Biology. “We've known this. But this is the first time anyone has measured how they land.”

Using sophisticated motion capture cameras in a special flight enclosure, the team filmed each species of bat as it swooped toward a latticed landing pad and landed on it. Cynopterus brachyotis, a tree-roosting bat common in tropical parts of southeast Asia, executed a half-backflip as it swooped upward to the landing site, landing as its hind legs and thumbs touched the pad simultaneously — a four-point landing, the group observed. The landing is hard, Riskin noted, with an impact force more than four times the species’ body weight.

The team then turned its attention to two cave-roosting species, Carollia perspicillata and Glossophaga soricina. These bats, common in Central and South America, approach their landing target with a vertical pitch and then, at the last instant, yaw to the left or to the right — executing a cartwheel of sorts — before grasping the landing pad with just their hind legs. The two-point landing is much gentler than the impact force exerted by the tree-roosting bats, the researchers observed; the cave-roosting bats have a landing impact force of just one-third of their body weight.

There are about 1,200 recognized bat species worldwide, so Riskin was cautious about not drawing any grand conclusions. Still, he said, the fact that the team has documented that bats land differently could open new insights into a species that makes up roughly one-fifth of all mammals on earth. “It's opening the door to how bats evolved,” Riskin said. “You can say that bats have been hanging upside down since they first evolved, and it has probably been one of the keys to their worldwide success.”

Other Brown researchers who worked on the paper include Sharon Swartz, associate professor of biology; Tatjana Hubel, a postdoctoral researcher; and Joseph Bahlman, a graduate student. John Ratcliffe, a biologist at the University of Southern Denmark, and Thomas Kunz, a biologist at Boston University, contributed to the paper.

Native African people who have never even listened to the radio before can nonetheless pick up on happy, sad, and fearful emotions in Western music, according to a new report published online on March 19th in Current Biology, a Cell Press publication. The result shows that the expression of those three basic emotions in music can be universally recognized, the researchers said.

"These findings could explain why Western music has been so successful in global music distribution, even in music cultures that do not as strongly emphasize the role of emotional expression in their music," said Thomas Fritz of the Max-Planck-Institute for Human Cognitive and Brain Sciences.

The expression of emotions is a basic feature of Western music, and the capacity of music to convey emotional expressions is often regarded as a prerequisite to its appreciation in Western cultures, the researchers explained. In other musical traditions, however, music is often appreciated for other qualities, such as group coordination in rituals.

In the new study, Fritz, Stefan Koelsch, and their colleagues wanted to find out whether the emotional aspects of Western music could be appreciated by people who had no prior exposure to it. Previous studies had asked similar questions about people with little experience with a particular musical form, for instance Westerners listening to Hindustani music, they said. But to really get at musical universals requires participants who are completely naïve to Western music.

Fritz enlisted members of the Mafa, one of about 250 ethnic groups in Cameroon. He traveled to the extreme north of the Mandara mountain ranges, where they live, with a laptop and sun collector to supply electricity in his backpack.

Their studies showed that both Western and Mafa listeners, who had never before heard Western music, could recognize emotional expressions of happiness, sadness, and fear in the music more often than would be expected by chance. However, they report that the Mafa showed considerable variability in their performance, with two of twenty-one study participants performing at chance level.

Both groups relied on similar characteristics of music to make those calls; both Mafas and Westerners relied on temporal cues and on mode for their judgment of emotional expressions, although this pattern was more marked in Western listeners.

By manipulating music, the researchers also found that both Western listeners and African listeners find original music more pleasant than altered versions. That preference is probably explained in part by the increased sensory dissonance of the manipulated tunes.

"In conclusion," the researchers wrote, "both Mafa and Western listeners showed an ability to recognize the three basic emotional expressions tested in this study from Western music above chance level. This indicates that these emotional expressions conveyed by the Western musical excerpts can be universally recognized, similar to the largely universal recognition of human emotional facial expression and emotional prosody." Prosody refers to the rhythm, stress, and intonation of connected speech.

The Boston Center for Refugee Health and Human Rights (BCRHHR) at Boston Medical Center recently treated many of the large number of Tibetan refugee monks who fled violent religious persecution. These individuals arrived in Boston suffering from symptoms of traumatic stress, interfering with their meditative practice. The monks were diagnosed by their traditional healers as having srog-rLung, a life-wind imbalance. Recognizing that barriers exist between western and eastern medicine, the BCRHHR researched and implemented its own complementary therapy options to heal them. These findings appear online in the March issue of Mental Health, Religion and Culture.

According to Tibetan medicine, a srog-rLung disturbance has the potential to develop into a serious mental illness, leaving the victim at odds with the balance of the universe as well as jeopardizing his personal health. Symptoms of srog-rLung include uncontrollable crying, worrying, excessive mental, physical or verbal activity and an unhappy mind. Other conditions affecting the monk’s health include anxiety, depression and post traumatic stress disorder (PTSD).

Research in cross-cultural health settings, particularly refugee health services, shows that successful treatment is contingent on a combination of the patient’s interpretation of the illness and biomedical categories. This allows the patient to actively participate in his or her own healing. Cross-cultural psychiatric assessment is also necessary in determining appropriate treatment options, as treatment can be detrimental if not harmonized with the religious context in which mental illness will develop for these monks. The BCRHHR used traditional healers to obtain a dual diagnosis for the development of holistic therapy that responds to both PTSD and srog-rLung.

“This research and treatment involving patients accustomed only to traditional medicine, presented an opportunity for the acceptance of non-traditional therapeutic approaches,” explains Michael Grodin, MD, professor of health law, bioethics and human rights at Boston University School of Public Health, and professor of psychiatry, sociomedical sciences and community medicine at Boston University School of Medicine. “The difference between Tibetan and Western disease pathologies represents the need for evidence-based complementary therapies, such as the Tibetan monks in exile and other religious refugee populations,” said Grodin.

Tibetan Buddhist tradition dictates that the cure for suffering is enlightenment, attainable through meditation. When this occurs, the body is freed from anxieties and fears. The monks who were treated for PTSD and srog-rLung are finding that meditation, once second nature, has become difficult after nights filled with flashbacks that put the monks in a state of hyper-vigilance for the next day.

According to the researchers, in order to provide complimentary therapy for the monks, eastern and western medicine needed to be integrated to properly address both conditions. The spiritual aspect of the Tibetan medical model, which is at the core of the monks’ experience of illness, guided this research. Ancient Tibetan Bon tradition of yogic practice was used to induce the mind into a relaxed state necessary to purify oneself through motion. This yogic practice combines movement of the body and controlled breath with movements of the mind to bring mental stability and offers an alternative to the monks’ inability to eliminate invasive thoughts. Another therapy that was used is singing bowl therapy—a form of music therapy, as sound has a direct connection to the heart, which aligns with srog-rLung experienced by the monks.

Grodin said the refugee health center at BMC integrated techniques of western medicine, such as anti-depressant prescribing and psychotherapy, with Tibetan healing practices, including medicines prescribed by Tibetan Amchi, meditation advice, Tai Chi and Qi Gong exercises. Grodin is trained in traditional Chinese medicine, such as acupuncture and meditation.

Other authors on the publication were Adriana Lee Benedict of Harvard College and Linda Mancini of the LamRim Buddhist Center and the BCRHHR.

Researchers have found what they say is some of the first unambiguous evidence that an animal other than humans can make spontaneous plans for future events. The report in the March 9th issue of Current Biology, a Cell Press publication, highlights a decade of observations in a zoo of a male chimpanzee calmly collecting stones and fashioning concrete discs that he would later use to hurl at zoo visitors.

"These observations convincingly show that our fellow apes do consider the future in a very complex way," said Mathias Osvath of Lund University. "It implies that they have a highly developed consciousness, including life-like mental simulations of potential events. They most probably have an 'inner world' like we have when reviewing past episodes of our lives or thinking of days to come. When wild chimps collect stones or go out to war, they probably plan this in advance. I would guess that they plan much of their everyday behavior."

While researchers have observed many ape behaviors that could involve planning both in the wild and in captivity, it generally hasn't been possible to judge whether they were really meeting a current or future need, he added. For instance, when a chimp breaks a twig for termite fishing or collects a stone for nut cracking, it can always be argued that they are motivated by immediate rather than future circumstances.

And that's what makes the newly described case so special, Osvath said. It is clear that the chimp's planning behavior is not based on a "current drive state." In contrast to the chimp's extreme agitation when throwing the stones, he was always calm when collecting or manufacturing his ammunition.

Osvath said he thinks wild chimps in general, as well as other animals, probably have the planning ability demonstrated by the individual described in the study. Indeed, experiments conducted recently with other captive chimpanzees have shown they are capable of making such plans. (Some have argued, however, that those findings could be the result of experimental artifacts.)

"I think that wild chimpanzees might be even better at planning as they probably rely on it for their daily survival," Osvath said. "The environment in a zoo is far less complex than in a forest. Zoo chimps never have to encounter the dangers in the forest or live through periods of scarce food. Planning would prove its value in 'real life' much more than in a zoo."

Oedipus Wrecked: Study Supporting the Mother of All Psychological Complexes Withdrawn by Brendan Borrell

A journal retracts a paper that supported the idea that your wife is likely to look like your mother, but others say that Freud's theory may still hold water

Cell phones are a danger on the road in more ways than one. Two new studies show that talking on the phone while traveling, whether you're driving or on foot, is increasing both pedestrian deaths and those of drivers and passengers, and recommend crackdowns on cell use by both pedestrians and drivers. The new studies, lead-authored by Rutgers University, Newark, Economics Professor Peter D. Loeb, relate the impact of cell phones on accident fatalities to the number of cell phones in use, showing that the current increase in deaths attributed to cell phone use follows a period when cell phones actually helped to reduce pedestrian and traffic fatalities. However, this reduction in fatalities disappeared once the numbers of phones in use reached a "critical mass" of 100 million, the study found.

These studies looked at cell phone use and motor vehicle accidents from 1975 through 2002, and factored in a number of variables, including vehicle speed, alcohol consumption, seat belt use, and miles driven.

The studies found the cell phone-fatality correlation to be true even when weighing in factors such as speed, alcohol consumption, and seat belt use.

Loeb and his co-author determined that, at the current time, cell phone use has a "significant adverse effect on pedestrian safety" and that "cell phones and their usage above a critical threshold adds to motor vehicle fatalities." In the late 1980s and part of the 1990s, before the numbers of phones exploded, cell phone use actually had a "life-saving effect" in pedestrian and traffic accidents, Loeb notes. "Cell-phone users' were able to quickly call for medical assistance when involved in an accident. This quick medical response actually reduced the number of traffic deaths for a time," Loeb hypothesizes.

However, this was not the case when cells were first used in the mid-1980s, when they caused a "life-taking effect" among pedestrians, drivers and passengers in vehicles. In those early days, when there were fewer than a million phones, fatalities increased, says Loeb, because drivers and pedestrians probably were still adjusting to the novelty of using them, and there weren't enough cell phones in use to make a difference in summoning help following an accident, he explains.

The "life-saving effect" occurred as the volume of phones grew into the early 1990s, and increasing numbers of cells were used to call 911 following accidents, leading to a drop in fatalities, explains Loeb. But this life-saving effect was canceled out once the numbers of phones reached a "critical mass" of about 100 million and the "life-taking effect" – increased accidents and fatalities -- outweighed the benefits of quick access to 911 services, according to Loeb.

"The cell phone effect on pedestrian fatalities" (Transportation Research Part E, Elsevier, Vol. 45, Issue 1, January 2009, with William A. Clarke, Bentley University, Waltham, MA,) looked at pedestrian fatalities related to cell phone use; the still-to-be-released "The impact of cell phones and BAC Laws on Motor Vehicle Fatality Rates" (Applied Economics, Loeb, Clarke and Richard Anderson, New Jersey City University), examines all cell-related traffic fatalities. Loeb and his co-authors used econometric models to analyze data from a number of government and private studies, including those by the National Highway Traffic Safety Administration, the Department of Transportation, MADD, and the U.S. Census Bureau, among others.

He and his co-authors recommend that governments consider more aggressive policies to reduce cell phone use by both drivers and pedestrians, to reduce the number of fatalities.