With all the research into how the medical issues of dogs often run parallel to our own, it’s no surprise that eight obsessive-compulsive Doberman pinschers are adding to our body of knowledge about that disorder.
A new study made use of MRI brain scans and found dogs and people with obsessive compulsive disorder (OCD) have similar brain abnormalities and share certain brain characteristics.
Three years ago, researchers found the shared gene believed responsible for flank-sucking, blanket-sucking and other compulsive behavior in Dobermans.
The new study shows what’s going on in their brains is similar — at least as an MRI sees it — to what’s going on in our’s.
“We have a lot of commonality with our best friend the dog,” said study leader Niwako Ogata, an assistant professor of animal behavior at Purdue University College of Veterinary Medicine in Indiana.
Just as elderly dogs with the canine equivalent of Alzheimer’s are being used as models to understand the degenerative disease in people, studying dogs is providing some clues into OCD, an anxiety disorder afflicting anywhere from 2 to 8 percent of Americans.
For the study, Ogata and colleagues recruited eight Doberman pinschers with CCD (canine compulsive disorder) and a control group of eight Dobermans without CCD, according to National Geographic. The team obtained MRI scans for each group and discovered that the CCD dogs had higher total brain and gray matter volumes and lower gray matter densities in certain parts of the brain. That’s similar to the structures of people brains’ with OCD.
It’s not known why both species’ brains show these features, Ogata said, but her team plans to repeat the experiment with more dogs and more breeds.
The team chose Dobermans because of the prevalence of CCD in the breed. About 28 percent of Dobermans in the U.S. are afflicted.
People with OCD often perform the same rituals over and over again, like washing and rewashing their hands and locking and relocking doors. In dogs, common compulsive behaviors include paw-licking and tail-chasing.
Ogata, whose study was published online in April in the journal Progress in Neuro-Psychopharmacology & Biological Psychiatry, said the study provides a better idea of “”how brains develop, and when and how genes interact with [their] environment to cause some behavior problems for both humans and dogs.”
Posted by jwoestendiek June 14th, 2013 under Muttsblog.
Tags: animals, behavior, blanket, brain, ccd, compulsive, disorder, doberman, dog, dogs, flank, gene, genetics, health, humans, licking, medicine, mri, Niwako Ogata, obsessive, ocd, pets, pinschers, purdue, research, science, species spanning, study, tail chasing, veterinary, zoobiquity
A new study suggests the earliest domestic dogs weren’t just kept for hunting and protection, but for loving — a premise supported by evidence that some prehistoric pet owners actually outfitted their dogs in bling, if not before death, at least after it.
An analysis of ancient dog burials, published in PLoS ONE, found that deceased dogs were often laid to rest not just with respect, but with toys and ornaments, Jennifer Viegas reports on Discovery.com.
The findings show that, at least as recently as 10,000 years ago, dogs were valued for more than their ability to stand sentry and track game.
The researchers also say the earliest dog lovers were fish-eaters, and held spiritual beliefs. Subsisting on diets rich in seafood, they apparently didn’t rely on dogs to help them find dinner, or as dinner.
“Dog burials appear to be more common in areas where diets were rich in aquatic foods because these same areas also appear to have had the densest human populations and the most cemeteries,” Robert Losey, lead author of the study told Discovery News.
“If the practice of burying dogs was solely related to their importance in procuring terrestrial game, we would expect to see them in the Early Holocene (around 9,000 years ago), when human subsistence practices were focused on these animals,” Losey, a University of Alberta anthropologist, added. “Further, we would expect to see them in later periods in areas where fish were never really major components of the diet and deer were the primary focus, but they are rare or absent in these regions.”
For the study, Losey’s team researched dog burials worldwide, but focused particularly on ones located in Eastern Siberia. The earliest known domesticated dog was found there, dating to 33,000 years ago. Dog burials in the region are more recent, going back about 10,000 years.
They found that dogs were sometimes buried with meaningful items, sometimes even their human, showing that man’s bond with dog — while it may be ever-strengthening — goes way, way back.
According to the Discovery report:
“…One dog, for example, was laid to rest “much like it is sleeping.” A man was buried with two dogs, one carefully placed to the left of his body, and the other to the right. A dog was buried with a round pebble, possibly a toy or meaningful symbol, placed in its mouth. Still other dogs were buried with ornaments and implements, such as spoons and stone knives.
“One of the most interesting burials contains a dog wearing a necklace made out of four red deer tooth pendants. Such necklaces appear to have been a fashion and/or symbolic trend at the time, since people wore them too.”
The researchers found that most of the dog burials in the area occurred during the Early Neolithic era, about 8,000 years ago.
(Photo by Robert Losey, via Discovery.com)
Posted by jwoestendiek May 22nd, 2013 under Muttsblog.
Tags: animals, bling, burial, death, dog, dogs, domesticated, earliest, fish, grieving, man, mourning, pets, prehistoric, research, robert losey, seafood, siberia, spirituality, study, univerisity of alberta, wolf
In a collaboration between Penn and the Monell Chemical Sciences Centers, Ohlin and McBain (above) and Thunder (left) will use their noses to detect the disease in humans.
Ovarian cancer kills more than 14,000 women every year and is the fifth leading cause of cancer-related deaths in women in the nation.
The collaboration, the Philadelphia Inquirer reports, takes aim at the silent killer with a combination of chemistry, nanotechnology — and dogs.
Canines have been detecting lung and breast cancer for years. With an $80,000 grant from the Kaleidoscope of Hope Foundation, the new project will assess their effectiveness in sniffing out ovarian cancer, and continue an investigation that has been underway in Sweden.
The Swedish professor behind that project, who was using his own dogs for the study, is retiring. But he’s lending his expertise to those involved in the Penn project.
“He’s been advising us along the way to we don’t repeat the same mistakes he made along the way,” said Dr. Cynthia Otto, director of the Working Dog Center and Associate Professor of Critical Care at Penn Vet.
While the disease is often difficult to diagnose, ovarian cancer’s victims have a survival rate of 90 percent. No effective screening protocol yet exists to detect cases in the early stages.
In the new program, scientists from Penn Medicine’s Division of Gynecologic Oncology will take tissue and blood samples from both healthy and ovarian cancer patients. The samples will be analyzed by chemists, scientists, computers and the puppies at the Working Dog Center, who will be exposed to healthy samples and cancer samples in vented containers they can’t access, but can smell.
The dogs began their training at 8-weeks of age.
“They’re all fabulous and they are very strong in olfaction,” Otto said.
(Photos: Philadelphia Inqurer)
Posted by jwoestendiek May 9th, 2013 under Muttsblog.
Tags: animals, cancer, cancer sniffing, chocolate labs, collaboration, detect, detecting, detection, dog, dogs, Kaleidoscope of Hope Foundation, mcbain, medicine, Monell Chemical Sciences Centers, ohlin, ovarian, ovarian cancer, penn, pets, project, research, science, sniff, sniffing, springer spaniel, study, thunder, university of pennsylvania, working dog center
Cats displaced dogs as the nation’s favorite pet – or favourite, if you live there – for the first time in 1994, according to the Pet Food Manufacturers’ Association (PFMA).
Now, a study by the association predicts dogs will be number one again, possibly as early as this year.
“Rovertaken,” read the headline in the Sun. “It’s raining more dog than cat,” said the Daily Mail.
The study says the number of dogs in Britain is at an all-time high having risen from 5 million in 1970 to 8.3 million today. Cats have fallen from a 2004 peak of 9.6 million to 8.6 million.
Figures from the Kennel Club reveal ‘handbag dog’ breeds have increased sixfold and the number of Chihuahuas have tripled since 2001.
While more households have dogs than cats — both in the U.S. and Britain — there are more cats overall in both countries, given the number of households where mutliple cats reside. As of 2007, census figures showed 82 million cats and 72 million dogs in the U.S.
Posted by jwoestendiek April 5th, 2011 under Muttsblog.
Tags: animals, britain, cats, census, count, dogs, favorite, fish, great britain, number, pet, pet ownership, pets, population, study, top, u.s., uk
A University of Maine graduate student says he has found a bone fragment from what he believes is the earliest domesticated dog ever found in the Americas — one that walked the continent 9,400 years ago.
And where he found it — ensconced in a dried-out sample of human waste — gives proof that eating dog was part of America’s culture, at least before America was America.
Graduate student Samuel Belknap III came across the fragment while analyzing a sample of human waste unearthed in the 1970s. Carbon-dating placed the age of the bone at 9,400 years, and a DNA analysis confirmed it came from a dog — as opposed to a wolf, coyote or fox.
The Associated Press reports that the fragment — which was the dark orange color characteristic of bone that has passed through the digestive track — was found in Hinds Cave in southwest Texas.
The fragment provides the earliest evidence that dogs were eaten by humans in North America, and may have been bred as a food source, he said.
Belknap was studying the diet and nutrition of the people in the Lower Pecos region of Texas between 1,000 and 10,000 years ago when he came across the bone.
Belknap and other researchers from the University of Maine and the University of Oklahoma’s molecular anthropology laboratories, where the DNA analysis was done, have written a paper on their findings, scheduled for publication in the American Journal of Physical Anthropology later this year.
The fragment is about six-tenths of an inch long and three- to four-tenths of an inch wide. Belknap said he and a fellow student identified the bone as a fragment from where the skull connects with the spine. He said it came from a dog that probably resembled the small short-haired dogs that were common among the Indians of the Great Plains.
Other archaeological findings have found evidence of domestic dogs in the U.S. as long as 8,000 years ago.
A 1980s study reported dog bones found at Danger Cave, Utah, were between 9,000 and 10,000 years old, but those dates were based on an analysis of the surrounding rock laters as opposed to carbon dating. In Idaho, researchers believed they’d found 11,000-year-old dog bones, but later tests showed them to be no more than 3,000 years old.
Worldwide, studies have found evidence of dogs going back 31,000 years from a site in Belgium, 26,000 years in the Czech Republic and 15,000 years in Siberia.
The earliest dogs in North America are believed to have come with the early settlers across the Bering land bridge from Asia.
Belknap said eating dogs was once common in Central America, and that some Great Plain Indian tribes ate dogs when food was scarce or for celebrations.
”It was definitely an accepted practice among many populations,” he said.
Posted by jwoestendiek January 19th, 2011 under Muttsblog.
Tags: america, analysis, anthropology, archaeology, ate, bone, carbon dating, diet, digested, dna, dog, domesticated, earliest, eaten, evidence, excrement, first, fragment, hinds cave, human, indians, nutrition, oldest, research, samuel belknap, study, texas, university of maine, waste