Sunday, November 28, 2010

Even Chimp has right hand habbit

Humans are not the only species to prefer to use their right hand chimpanzees also share the mannerism, according to a new study by Spanish scientists.

The primates were provided with food concealed inside tubes and the scientists monitored them to see which hand they used to get at it, either their fingers or with the help of tools.

"The chimpanzees showed a special use of the right hand to get the food from the tube," the Catalan Institute of Human Palaeoecology and Social Evolution, which coordinated the study, said in a statement. "This feature had traditionally been considered exclusively human and had been believed to be caused by asymmetries experiential in the human brain that are related to the realization of complicated activities that require the use and coordination of both hands."

The study also found that female chimpanzees, like their human counterparts, are more likely to be right-handed than males.

The researchers said this suggests "that just like in our species, there are shared biological factors, genetic and hormonal, that modulate the functioning of our brain."