Laryngeal and respiratory activity during vocalization in macaque monkeys

Robert West*, Charles R. Larson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


The present study describes the laryngeal and respiratory muscle activity associated with vocalizations in macaque monkeys. During the bark vocalization, a short, aperiodic call, the cricothyroid, thyroarytenoid, rectus abdominis, and intercostals were active while the posterior cricoarytenoid and diaphragm were quiet. During the coo vocalization, a longer, clear call, the cricothyroid, thyroarytenoid, intercostals, rectus abdominis, and diaphragm were active. In one monkey, the posterior cricoarytenoid was also active during the call, while in another monkey it was not. Laryngeal muscle activity was correlated with the amplitude and duration of the coo call. Results suggest that the amplitude and duration differences between calls are determined primarily by laryngeal modification of the airflow, and that the differences in posterior cricoarytenoid activity may be due to differences in voice intensity.

Original languageEnglish (US)
Pages (from-to)54-68
Number of pages15
JournalJournal of Voice
Issue number1
StatePublished - Mar 1993


  • EMG
  • Larynx
  • Monkey
  • Respiratory muscles
  • Vocalization

ASJC Scopus subject areas

  • Speech and Hearing
  • LPN and LVN
  • Otorhinolaryngology


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