Author ORCID Identifier
Mangalam - https://orcid.org/0000-0001-6369-0414
Document Type
Article
Publication Date
5-20-2014
Abstract
There can be several factors that are likely to have played a role in the evolution of hand preference in humans and non-human primates, which the existing theories do not consider. There exists a possibility that hand preference in non-human primates evolved from the pre-existing lateralities in more elementary brain functions and behavior, or alternatively, the two coevolved. A basic example can be a hand-mouth command system that could have evolved in the context of ingestion. In the present study, we examined the relationship between lateralities in prehension and mastication processes, that is, hand and cheek pouch usage, in free-ranging bonnet macaques, Macaca radiata. The macaques preferentially used one hand–the ‘preferred’ hand, to pick up the bananas lying on the ground. Lateralities in hand and cheek pouch usage (for both filling and emptying) were positively related with each other, that is, the macaques used the cheek pouch corresponding to the preferred hand predominantly and before the other. Moreover, when the macaques used the non-preferred hand to pick up the bananas, the frequency of contralateral cheek pouch usage was higher than the frequency of ipsilateral cheek pouch usage, that is, the combined structure of hand, mouth, and food did not influence the relationship between laterality in hand usage and laterality in cheek pouch usage. These findings demonstrate laterality in a relatively more involuntary function than those explored previously in any non-human primate species (e.g., facial expressions and manual gestures).
DOI
https://doi.org/10.1371/journal.pone.0097971
Journal Title
PLOS One
Volume
9
Issue
5
Recommended Citation
Mangalam, Madhur; Desai, Nisarg; and Singh, Mewa, "Do Right-Handed Monkeys Use the Right Cheek Pouch before the Left?" (2014). Journal Articles. 362.
https://digitalcommons.unomaha.edu/biomechanicsarticles/362
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Comments
This is an open access article licensed under the Creative Commons Attribution license.
https://doi.org/10.1371/journal.pone.0097971