Organization of local interneurons in optic glomeruli of the dipterous visual system and comparisons with the antennal lobes

Nicholas J. Strausfeld, Irina Sinakevitch, Jun Ya Okamura

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

The lateral protocerebrum of the fly's brain is composed of a system of optic glomeruli, the organization of which compares to that of antennal lobe glomeruli. Each optic glomerulus receives converging axon terminals from a unique ensemble of optic lobe output neurons. Glomeruli are interconnected by systems of spiking and nonspiking local interneurons that are morphologically similar to diffuse and polarized local interneurons in the antennal lobes. GABA-like immunoreactive processes richly supply optic glomeruli, which are also invaded by processes originating from the midbrain and subesophageal ganglia. These arrangements support the suggestion that circuits amongst optic glomeruli refine and elaborate visual information carried by optic lobe outputs, relaying data to long-axoned neurons that extend to other parts of the central nervous system including thoracic ganglia. The representation in optic glomeruli of other modalities suggests that gating of visual information by other sensory inputs, a phenomenon documented from the recordings of descending neurons, could occur before the descending neuron dendrites. The present results demonstrate that future studies must consider the roles of other senses in visual processing.

Original languageEnglish (US)
Pages (from-to)1267-1288
Number of pages22
JournalDevelopmental Neurobiology
Volume67
Issue number10
DOIs
StatePublished - Sep 1 2007

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Keywords

  • Glomerular organization
  • Insect
  • Local interneurons
  • Multimodal convergence
  • Visual processing

ASJC Scopus subject areas

  • Developmental Neuroscience
  • Cellular and Molecular Neuroscience

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