Navigation Links
Ape gestures offer clues to the evolution of human communication

Researchers at the Yerkes National Primate Research Center, Emory University, have found bonobos and chimpanzees use manual gestures of their hands, feet and limbs more flexibly than they do facial expressions and vocalizations, further supporting the evolution of human language began with gestures as the gestural origin hypothesis of language suggests. This study appears in the current issue of the Proceedings of the National Academy of Sciences.

Working with two groups of bonobos (13 animals) and two groups of chimpanzees (34 animals), Yerkes researchers Amy Pollick, PhD, and Frans de Waal, PhD, distinguished 31 manual gestures and 18 facial/vocal signals. They found both species used facial/vocal signals similarly, but the same did not hold true for the manual gestures. Rather, the researchers found both within and between species the manual gestures were less closely tied to a particular emotion and, thereby, serve a more adaptable function. For example, a single gesture may communicate an entirely different message depending upon the social context in which it is used.

"A chimpanzee may stretch out an open hand to another as a signal for support, whereas the same gesture toward a possessor of food signals a desire to share," said Pollick. "A scream, however, is a typical response for victims of intimidation, threat or attack. This is so for both bonobos and chimpanzees, and suggests the vocalization is relatively invariant," Pollick continued.

By studying similar types of communication in closely related species, researchers are able to determine shared ancestry. We know gestures are evolutionarily younger than facial expressions and vocalizations, as shown by their presence in apes and humans but not in monkeys. "A gesture that occurs in bonobos and chimpanzees as well as humans likely was present in the last common ancestor," said Pollick. "A good example of a shared gesture is the open-hand begging gesture, used by both apes and humans. This gesture can be used for food, if there is food around, but it also can be used to beg for help, for support, for money and so on. It's meaning is context-dependent," added de Waal.

Looking for further distinctions between species, the researchers found bonobos use gestures more flexibly than do chimpanzees. "Different groups of bonobos used gestures in specific contexts less consistently than did different groups of chimpanzees," said Pollick. The researcher's findings also suggest bonobos and chimpanzees engage in multi-modal communication, combining their gestures with facial expressions and vocalizations to communicate a message. "While chimpanzees produce more of these combinations, bonobos respond to them more often. This finding suggests the bonobo is a better model of symbolic communication in our early ancestors," concluded Pollick.


'"/>

Source:Emory University


Related biology news :

1. Ancient olfaction protein is shared by many bugs, offering new pest control target
2. Protein offers way to stop microscopic parasites in their tracks
3. Nanoparticles offer new hope for detection and treatment
4. Whats really making you sick? Plant pathologists offer the science behind Sick Building Syndrome
5. Gene silencing technique offers new strategy for treating, curing disease
6. Mosaic mouse technique offers a powerful new tool to study diseases and genetics
7. Engineered skin offers clues to melanoma development
8. Flies on speed offer insight into the roles of dopamine in sleep and arousal
9. Neurotransmitters signal aggressive cancer, offer potential for early diagnosis
10. Study findings offer potential new targets for antibiotics
11. Dendritic cells offer new therapeutic target for drugs to treat MS and other autoimmune disease
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/2/2016)... Feb. 2, 2016 Technology Enhancements Accelerate Growth of ... of the digital and computed radiography markets in ... and Indonesia (TIM). It provides ... size, as well as regional market drivers and restraints. ... market penetration and market attractiveness, both for digital and ...
(Date:2/1/2016)... 1, 2016  Wocket® smart wallet ( www.wocketwallet.com ) announces the launch ... Joey Fatone . Las Vegas , where Joey ... --> Las Vegas , where Joey appeared at the ... new video ad was filmed at the Consumer Electronics Show (CES2016) in ... booth to meet and greet fans. --> ...
(Date:1/22/2016)... , January 22, 2016 ... the addition of the  "Global Behavioral ... offering. --> http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) ... "Global Behavioral Biometric Market 2016-2020"  report ... Research and Markets ( http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has ...
Breaking Biology News(10 mins):
(Date:2/4/2016)... February 4, 2016 --> ... acceleration company is pleased to provide the following update on ... Over the last 3 months we have significantly increased ... agreements exceeding $1,000,000. As a result, we have positioned ourselves ... Inc. license agreement and expect that development to continue on ...
(Date:2/4/2016)... 4, 2016 Sinovac Biotech Ltd. ("Sinovac" or ... of biopharmaceutical products in China , ... of directors received on February 4, 2016 a preliminary ... consortium comprised of PKU V-Ming ( Shanghai ... CICC Qianhai Development ( Shenzhen ) Fund ...
(Date:2/4/2016)... ... February 04, 2016 , ... Many of the engineers at FireflySci, ... What sets them apart from other cuvette manufacturers is their supercharged customer service ... On top of this steady flow of inside information, they have recently revamped ...
(Date:2/3/2016)... 2016  With the growing need for better ... underway, therapies such as monoclonal antibodies, recombinant protein ... of indications are in high demand. Conventionally expression ... and production of these therapeutics. However, due to ... costs, novel approaches and novel expression systems are ...
Breaking Biology Technology: