Lesions to the medial preoptic area affect singing in the male European starling (Sturnus vulgaris)

Lauren V. Riters, Gregory F. Ball

Research output: Contribution to journalArticlepeer-review

Abstract

The aromatization of testosterone (T) in the medial preoptic nucleus (POM) is known to regulate male courtship and sexual behaviors expressed prior to, and in anticipation of, copulation. Singing in male European starlings is used to attract mates prior to physical sexual contact, suggesting that the POM might be involved. The present study was performed to examine the effects of lesions targeting the POM on singing and courtship behavior in reproductively active male starlings. A significant decrease in song output and the gathering of green nest materials was observed in males with lesions to the POM compared to males with damage to brain areas outside of the POM. Lesions did not affect a male's tendency to remain near a female or to occupy a nestbox, suggesting that the effects of POM lesions were specific to courtship behaviors. Behavioral differences were not related to testis mass or volume, and GnRH immunoreactivity was observed within the hypothalamus and median eminence for each male, suggesting that the effects of POM lesions were related specifically to POM involvement in song expression rather than to a disruption of the GnRH axis. These results suggest a general role for the POM in the expression of behaviors related to sexual arousal or anticipation, including song.

Original languageEnglish (US)
Pages (from-to)276-286
Number of pages11
JournalHormones and Behavior
Volume36
Issue number3
DOIs
StatePublished - Dec 1999

Keywords

  • Male sexual behavior
  • Sexual arousal
  • Song control system
  • Songbird

ASJC Scopus subject areas

  • Endocrinology
  • Endocrine and Autonomic Systems
  • Behavioral Neuroscience

Fingerprint Dive into the research topics of 'Lesions to the medial preoptic area affect singing in the male European starling (Sturnus vulgaris)'. Together they form a unique fingerprint.

Cite this