Oxytocin is a many splendored thing
Who needs children when a puppy can provide a similar emotional experience?
New Scientist magazine recently asked that question in an article about a Japanese study that showed relating to dogs causes a surge of the same hormones triggered by nurturing an infant, romantic love and close friendship.
Oxytocin, also known as the “cuddle chemical” and the “love drug,” has been found to relieve stress, combat depression, breed trust in humans and generally make life more worth living. When two humans bond, their oxytocin levels increase.
Miho Nagasawa and Takefumi Kikusui, biologists at Azuba University in Japan, suspected social contact between two different species might boost oxytocin levels, as well.
“Miho and I are big dog lovers and feel something changed in our bodies when gazed [upon] by our dogs,” Kikusui says.
They recruited 55 dog owners and their pets for a videotaped laboratory play session. Owners provided a urine sample to measure oxytocin levels. They were then divided into two groups — one that played with their dog for half an hour, one that sat in the same room but were told to completely avoid their dogs’ gazes.
Then everybody’s urine was tested again. Participants that spent a long time making eye contact were determined to have experienced increases in their oxytocin levels of more than 20%. Those who avoided their pooches’ gaze saw their oxytocin levels drop slightly.
Among those playing with their dogs, the longer they made eye contact, the higher the increase was in their levels of the hormone.
A flood of the cuddle chemical could explain why playing with dogs can lift moods and even improve symptoms of anxiety and depression, Kikusui says. Possibly, the scientists say, oxytocin even played a part in the domestication of dogs from wolves, about 15,000 years ago.
“Maybe during the evolutionary process, humans and dogs came to share the same social cues”, such as eye contact and hand gestures, Kikusui says. “This is why dogs can adapt to human society.”
Posted by John Woestendiek March 31st, 2009 under Muttsblog.
Tags: azuba university, bond, bonding, children, cuddle chemical, depression, dog, dogs, evolution, evolved, experiment, eye contact, hormone, hormones, humanization, japan, love drug, new scientist, owners, oxytocin, relationship, science, social contact, stress, study, trust