title: Maps of interaural delay in the owl's nucleus laminaris.
abstract: Axons from the nucleus magnocellularis form a presynaptic map of interaural time differences (ITDs) in the nucleus laminaris (NL). These inputs generate a field potential that varies systematically with recording position and can be used to measure the map of ITDs. In the barn owl, the representation of best ITD shifts with mediolateral position in NL, so as to form continuous, smoothly overlapping maps of ITD with iso-ITD contours that are not parallel to the NL border. Frontal space (0°) is, however, represented throughout and thus overrepresented with respect to the periphery. Measurements of presynaptic conduction delay, combined with a model of delay line conduction velocity, reveal that conduction delays can account for the mediolateral shifts in the map of ITD.
authors.affiliation: Department of Biology, University of Maryland, College Park, Maryland; cecarr@umd.edu.
authors.forename: Catherine E
authors.identifier: http://orcid.org/0000-0001-5698-6014
authors.initials: CE
authors.lastname: Carr
authors.affiliation: Department of Biology, University of Maryland, College Park, Maryland;
authors.forename: Sahil
authors.initials: S
authors.lastname: Shah
authors.affiliation: Institute for Biology II, RWTH Aachen, Aachen, Germany; and Institute for Theoretical Biology, Department of Biology, Humboldt-Universität zu Berlin, and Bernstein Center for Computational Neuroscience, Berlin, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: McColgan
authors.affiliation: Department of Biology, University of Maryland, College Park, Maryland;
authors.forename: Go
authors.initials: G
authors.lastname: Ashida
authors.affiliation: Institute for Theoretical Biology, Department of Biology, Humboldt-Universität zu Berlin, and Bernstein Center for Computational Neuroscience, Berlin, Germany.
authors.forename: Paula T
authors.initials: PT
authors.lastname: Kuokkanen
authors.affiliation: Institute for Biology II, RWTH Aachen, Aachen, Germany; and.
authors.forename: Sandra
authors.initials: S
authors.lastname: Brill
authors.affiliation: Institute for Theoretical Biology, Department of Biology, Humboldt-Universität zu Berlin, and Bernstein Center for Computational Neuroscience, Berlin, Germany.
authors.forename: Richard
authors.initials: R
authors.lastname: Kempter
authors.affiliation: Institute for Biology II, RWTH Aachen, Aachen, Germany; and.
authors.forename: Hermann
authors.initials: H
authors.lastname: Wagner
mesh_terms: D000818:Animals; D001369:Axons / Q000502:physiology; D001933:Brain Stem / Q000502:physiology*; D005260:Female; D008297:Male; D011930:Reaction Time; D065854:Spatial Navigation; D020305:Strigiformes; D009435:Synaptic Transmission
keywords: auditory; interaural time difference; local field potential; neurophonic; phase