Neural activity for complex sounds in the marmoset anterior cingulate cortex.
Rebekah L Gilliland1, Janahan Selvanayagam1, Alessandro Zanini1
1Centre for Functional and Metabolic Mapping, Robarts Research Institute, University of Western Ontario, London, ON, Canada.
Communications Biology
|October 11, 2024
Summary
Neurons in the anterior cingulate cortex (ACC) area 32 of marmosets process species-specific sounds. This research reveals how primate brain regions respond to vocalizations, offering insights into auditory processing and communication.
Area of Science:
- Neuroscience
- Primate Cognition
- Auditory Processing
Background:
- Vocalizations are crucial for nonhuman primates and may be precursors to human language.
- Previous studies suggest the anterior cingulate cortex (ACC) area 32 is involved in vocalization processing, but neuronal responses are unknown.
Purpose of the Study:
- To investigate the response properties of neurons in marmoset ACC area 32 to auditory stimuli.
- To determine if ACC area 32 neurons are selective for conspecific vocalizations.
Main Methods:
- Electrophysiological recordings were conducted in area 32 of common marmosets using high-density Neuropixels probes.
- Neuronal responses were characterized to various sounds, including conspecific vocalizations and other complex auditory stimuli.
Main Results:
- Nearly half of the recorded neurons in ACC area 32 responded to conspecific vocalizations and complex auditory stimuli.
- Neuronal responses showed a dynamic pattern: an initial non-selective decrease in activity, followed by increased, sound-selective activity.
Conclusions:
- Primate ACC area 32 plays a significant role in processing species-specific and biologically relevant sounds.
- These findings contribute to understanding the neural basis of auditory processing and vocal communication in primates.
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