The mapping of visual space by identified large second-order neurons in the dragonfly media ocellus

dc.contributor.authorBerry, Richard
dc.contributor.authorStange, Gert
dc.contributor.authorOlberg, Robert
dc.contributor.authorVan Kleef, Joshua
dc.date.accessioned2015-12-08T22:25:17Z
dc.date.issued2006
dc.date.updated2015-12-08T09:04:50Z
dc.description.abstractIn adult dragonflies, the compound eyes are augmented by three simple eyes known as the dorsal ocelli. The outputs of ocellar photoreceptors converge on relatively few second-order neurons with large axonal diameters (L-neurons). We determine L-neuron morphology by iontophoretic dye injection combined with three-dimensional reconstructions. Using intracellular recording and white noise analysis, we also determine the physiological receptive fields of the L-neurons, in order to identify the extent to which they preserve spatial information. We find a total of 11 median ocellar L-neurons, consisting of five symmetrical pairs and one unpaired neuron. L-neurons are distinguishable by the extent and location of their terminations within the ocellar plexus and brain. In the horizontal dimension, L-neurons project to different regions of the ocellar plexus, in close correlation with their receptive fields. In the vertical dimension, dendritic arborizations overlap widely, paralleled by receptive fields that are narrow and do not differ between different neurons. These results provide the first evidence for the preservation of spatial information by the second-order neurons of any dorsal ocellus. The system essentially forms a one-dimensional image of the equator over a wide azimuthal area, possibly forming an internal representation of the horizon. Potential behavioural roles for the system are discussed.
dc.identifier.issn0340-7594
dc.identifier.urihttp://hdl.handle.net/1885/33385
dc.publisherSpringer
dc.sourceJournal of Comparative Physiology A: Sensory, Neural, and Behavioral Physiology
dc.subjectKeywords: animal; article; biological model; brain; brain mapping; cell membrane potential; classification; comparative study; cytology; histology; insect; methodology; nerve cell; photostimulation; physiology; radiation exposure; sense organ; three dimensional ima Dragonfly; L-neuron; Ocelli; Receptive field; Three-dimensional reconstructions; White noise
dc.titleThe mapping of visual space by identified large second-order neurons in the dragonfly media ocellus
dc.typeJournal article
local.bibliographicCitation.issue10
local.bibliographicCitation.lastpage1123
local.bibliographicCitation.startpage1105
local.contributor.affiliationBerry, Richard, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationStange, Gert, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationOlberg, Robert, Union College
local.contributor.affiliationVan Kleef, Joshua, College of Medicine, Biology and Environment, ANU
local.contributor.authoremailu7701206@anu.edu.au
local.contributor.authoruidBerry, Richard, u3995519
local.contributor.authoruidStange, Gert, u7701206
local.contributor.authoruidVan Kleef, Joshua, u3551948
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor170112 - Sensory Processes, Perception and Performance
local.identifier.ariespublicationu9204316xPUB101
local.identifier.citationvolume192
local.identifier.doi10.1007/s00359-006-0142-5
local.identifier.scopusID2-s2.0-33749314943
local.identifier.uidSubmittedByu9204316
local.type.statusPublished Version

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