Related Experiment Videos
Baboons communicate with their right hand.
Adrien Meguerditchian1, Jacques Vauclair
1Department of Psychology, Research Center in Psychology of Cognition, Language and Emotion, University of Provence, Aix-en-Provence, France.
Behavioural Brain Research
|April 20, 2006
Summary
Baboons exhibit strong population-level right-handedness for communicative gestures, mirroring human handedness. This suggests that lateralization for language may have evolved from ancestral gestural communication systems.
Area of Science:
- Primate behavior
- Neuroscience
- Animal communication
Background:
- Human handedness, predominantly right-handedness, is linked to left cerebral hemisphere dominance for language.
- The presence of similar lateralized systems for communicative behaviors in non-human animals remains largely unexplored.
Purpose of the Study:
- To investigate population-level manual gesture handedness in baboons.
- To explore potential evolutionary links between gestural communication lateralization and language lateralization.
Main Methods:
- Observation of 60 captive baboons performing species-specific communicative manual gestures.
- Quantitative analysis of gesture usage and hand preference within the baboon population.
Main Results:
- Demonstrated strong population-level right-handedness in baboons for communicative manual gestures.
- This finding provides the first evidence of such lateralization in a non-human primate for a communicative gesture.
Conclusions:
- Baboon right-handedness in gestures supports the hypothesis that lateralization for language may have originated from left-hemisphere-controlled gestural communication systems.
- This research offers insights into the evolutionary origins of brain lateralization and language.