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Abstract

Neuroscience

Electroencephalography Measurements in Awake Marmosets Listening to Conspecific Vocalizations

Published: July 26th, 2024

DOI:

10.3791/66869

1Hakubi Center, Kyoto University, 2Center for the Evolutionary Origins of Human Behavior, Kyoto University, 3Center for Integrated Human Brain Science, Brain Research Institute, University of Niigata

Abstract

Vocal communication plays a crucial role in the social interactions of primates, particularly in survival and social organization. Humans have developed a unique and advanced vocal communication strategy in the form of language. To study the evolution of human language, it is necessary to investigate the neural mechanisms underlying vocal processing in humans, as well as to understand how brain mechanisms have evolved by comparing them with those in nonhuman primates. Herein, we developed a method to noninvasively measure the electroencephalography (EEG) of awake nonhuman primates. This recording method allows for long-term studies without harming the animals, and, importantly, allows us to directly compare nonhuman primate EEG data with human data, providing insights into the evolution of human language. In the current study, we used the scalp EEG recording method to investigate brain activity in response to species-specific vocalizations in marmosets. This study provides novel insights by using scalp EEG to capture widespread neural representations in marmosets during vocal perception, filling gaps in existing knowledge.

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