Organization of the antennal motor system in the sphinx moth Manduca sexta

Peter Kloppenburg, Scott M. Camazine, Xue Jun Sun, Peggy Randolph, John G. Hildebrand

Research output: Contribution to journalArticle

43 Scopus citations

Abstract

The antennae of the sphinx moth Manduca sexta are multimodal sense organs, each comprising three segments: scape, pedicel, and flagellum. Each antenna is moved by two systems of muscles, one controlling the movement of the scape and consisting of five muscles situated in the head capsule (extrinsic muscles), and the other system located within the scape (intrinsic muscles) and consisting of four muscles that move the pedicel. At least seven motoneurons innervate the extrinsic muscles, and at least five motoneurons innervate the intrinsic muscles. The dendritic fields of the antennal motoneurons overlap one another extensively and are located in the neuropil of the antennal mechanosensory and motor center. The density of motoneuronal arborizations is greatest in the lateral part of this neuropil region and decreases more medially. None of the motoneurons exhibits a contralateral projection. The cell bodies of motoneurons innervating the extrinsic muscles are distributed throughout an arching band of neuronal somata dorsal and dorsolateral to the neuropil of the antennal mechanosensory and motor center, whereas the cell bodies of motoneurons innervating the intrinsic muscles reside mainly among the neuronal somata situated dorsolateral to that neuropil.

Original languageEnglish (US)
Pages (from-to)425-433
Number of pages9
JournalCell and Tissue Research
Volume287
Issue number2
DOIs
StatePublished - Feb 20 1997

Keywords

  • Antenna
  • Antennal muscles
  • Brain, insect
  • Deutocerebrum
  • Manducn sexta (Insecta)
  • Motoneurons

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology
  • Cell Biology

Fingerprint Dive into the research topics of 'Organization of the antennal motor system in the sphinx moth Manduca sexta'. Together they form a unique fingerprint.

  • Cite this