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Author Spotlight: Investigating Vocal Information Representation in Small Primates and Its Alteration by Psychiatric Disorders Using Noninvasive EEG
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Cingulate cortex shapes early postnatal development of social vocalizations.

Gurueswar Nagarajan1, Denis Matrov1, Anna C Pearson1

  • 1Section on Behavioral Neuroscience, National Institutes of Health, Bethesda, United States.

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Early damage to the anterior cingulate cortex (ACC) in marmosets disrupts social vocal development. Neonatal ACC lesions altered social contact call quality and downstream brain structures, impacting vocal communication.

Keywords:
GABAbabblingmarmosetmature callsneural cicruitsneurosciencephee calls

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Primatology

Background:

  • Social vocalizations are crucial for social development.
  • The anterior cingulate cortex (ACC) plays a role in socioemotional regulation.
  • Understanding early brain development's impact on vocal behavior is vital.

Purpose of the Study:

  • To investigate the impact of early life anterior cingulate cortex (ACC) damage on the development of social vocalizations in common marmosets.
  • To determine if ACC lesions affect vocal call production, quality, and long-term neural changes.

Main Methods:

  • Neonatal common marmosets received ACC lesions or served as controls.
  • Vocalizations were recorded and analyzed during the first 6 weeks of life.
  • Post-mortem analysis examined GABA immunoreactivity in adult brain regions (amygdala, periaqueductal gray).

Main Results:

  • Early ACC lesions did not significantly affect basic vocal call production.
  • The quality, sequence, and acoustic properties of social contact calls were compromised.
  • Lesioned animals produced fewer, shorter, louder, and more monotonic social contact calls.
  • Adult animals with early ACC damage showed diminished GABA immunoreactivity in the amygdala and periaqueductal gray.

Conclusions:

  • The anterior cingulate cortex (ACC) is essential for the normal developmental trajectory of social vocal behavior.
  • Early ACC damage leads to lasting alterations in vocal communication and associated neural pathways.
  • Disruption of ACC function impacts inhibitory balance in downstream vocal control areas.