scholarly journals A Dominance Hierarchy of Auditory Spatial Cues in Barn Owls

PLoS ONE ◽  
2010 ◽  
Vol 5 (4) ◽  
pp. e10396 ◽  
Author(s):  
Ilana B. Witten ◽  
Phyllis F. Knudsen ◽  
Eric I. Knudsen
Keyword(s):  
Dominance Hierarchy ◽  
Spatial Cues ◽  
Barn Owls ◽  
Auditory Spatial Cues

Neural Correlates in the Processing of Auditory Spatial Cues and Stimuli Direction

2007 ◽  
Author(s):  
Marco Sperduti ◽  
Ralf Veit ◽  
Andrea Caria ◽  
Paolo Belardinelli ◽  
Niels Birbaumer ◽  
...  
Keyword(s):  
Neural Correlates ◽  
Spatial Cues ◽  
Auditory Spatial Cues

Auditory Spatial Cueing in Visual Search Tasks: Effects of Amplitude, Contrast and Duration

1995 ◽  
Vol 39 (1) ◽  
pp. 109-113 ◽  
Author(s):  
Thomas Z. Strybel ◽  
Jan M. Boucher ◽  
Greg E. Fujawa ◽  
Craig S. Volp
Keyword(s):  
Visual Search ◽  
Visual Field ◽  
Peripheral Visual Field ◽  
Search Performance ◽  
Spatial Cues ◽  
Spatial Cueing ◽  
Search Tasks ◽  
Auditory Spatial Cues

The effectiveness of auditory spatial cues in visual search performance was examined in three experiments. Auditory spatial cues are more effective than abrupt visual onsets when the target appears in the peripheral visual field or when the contrast of the target is degraded. The duration of the auditory spatial cue did not affect search performance.

System And Method For Generating Auditory Spatial Cues

2011 ◽  
Vol 130 (4) ◽  
pp. 2313 ◽  
Author(s):  
Graham Naylor ◽  
S. Gert Weinrich
Keyword(s):  
Spatial Cues ◽  
Auditory Spatial Cues

scholarly journals Comparison of Midbrain and Thalamic Space-Specific Neurons in Barn Owls

2006 ◽  
Vol 95 (2) ◽  
pp. 783-790 ◽  
Author(s):  
María Lucía Pérez ◽  
José Luis Peña
Keyword(s):  
Inferior Colliculus ◽  
Spatial Information ◽  
Receptive Fields ◽  
Stimulus Frequency ◽  
Auditory Pathway ◽  
Mammalian Brain ◽  
Neural Pathways ◽  
Spatial Cues ◽  
Auditory Space ◽  
Barn Owls

Spatial receptive fields of neurons in the auditory pathway of the barn owl result from the sensitivity to combinations of interaural time (ITD) and level differences across stimulus frequency. Both the forebrain and tectum of the owl contain such neurons. The neural pathways, which lead to the forebrain and tectal representations of auditory space, separate before the midbrain map of auditory space is synthesized. The first nuclei that belong exclusively to either the forebrain or the tectal pathways are the nucleus ovoidalis (Ov) and the external nucleus of the inferior colliculus (ICx), respectively. Both receive projections from the lateral shell subdivision of the inferior colliculus but are not interconnected. Previous studies indicate that the owl's tectal representation of auditory space is different from those found in the owl's forebrain and the mammalian brain. We addressed the question of whether the computation of spatial cues in both pathways is the same by comparing the ITD tuning of Ov and ICx neurons. Unlike in ICx, the relationship between frequency and ITD tuning had not been studied in single Ov units. In contrast to the conspicuous frequency independent ITD tuning of space-specific neurons of ICx, ITD selectivity varied with frequency in Ov. We also observed that the spatially tuned neurons of Ov respond to lower frequencies and are more broadly tuned to ITD than in ICx. Thus there are differences in the integration of frequency and ITD in the two sound-localization pathways. Thalamic neurons integrate spatial information not only within a broader frequency band but also across ITD channels.

scholarly journals Subthreshold resonance properties contribute to the efficient coding of auditory spatial cues

2014 ◽  
Vol 111 (22) ◽  
pp. E2339-E2348 ◽  
Author(s):  
M. W. H. Remme ◽  
R. Donato ◽  
J. Mikiel-Hunter ◽  
J. A. Ballestero ◽  
S. Foster ◽  
...  
Keyword(s):  
Spatial Cues ◽  
Efficient Coding ◽  
Resonance Properties ◽  
Subthreshold Resonance ◽  
Auditory Spatial Cues

scholarly journals Re-weighting of Sound Localization Cues by Audiovisual Training

2019 ◽  
Author(s):  
Daniel P. Kumpik ◽  
Connor Campbell ◽  
Jan W.H. Schnupp ◽  
Andrew J King
Keyword(s):  
Sound Localization ◽  
Visual Cues ◽  
Transfer Functions ◽  
Contextual Information ◽  
Auditory Localization ◽  
Spatial Cues ◽  
Auditory Cues ◽  
Cue Weighting ◽  
Auditory Spatial Cues ◽  
Interaural Level Differences

AbstractSound localization requires the integration in the brain of auditory spatial cues generated by interactions with the external ears, head and body. Perceptual learning studies have shown that the relative weighting of these cues can change in a context-dependent fashion if their relative reliability is altered. One factor that may influence this process is vision, which tends to dominate localization judgments when both modalities are present and induces a recalibration of auditory space if they become misaligned. It is not known, however, whether vision can alter the weighting of individual auditory localization cues. Using non-individualized head-related transfer functions, we measured changes in subjects’ sound localization biases and binaural localization cue weights after ~55 minutes of training on an audiovisual spatial oddball task. Four different configurations of spatial congruence between visual and auditory cues (interaural time differences (ITDs) and frequency-dependent interaural level differences (interaural level spectra, ILS) were used. When visual cues were spatially congruent with both auditory spatial cues, we observed an improvement in sound localization, as shown by a reduction in the variance of subjects’ localization biases, which was accompanied by an up-weighting of the more salient ILS cue. However, if the position of either one of the auditory cues was randomized during training, no overall improvement in sound localization occurred. Nevertheless, the spatial gain of whichever cue was matched with vision increased, with different effects observed on the gain for the randomized cue depending on whether ITDs or ILS were matched with vision. As a result, we observed a similar up-weighting in ILS when this cue alone was matched with vision, but no overall change in binaural cue weighting when ITDs corresponded to the visual cues and ILS were randomized. Consistently misaligning both cues with vision produced the ventriloquism aftereffect, i.e., a corresponding shift in auditory localization bias, without affecting the variability of the subjects’ sound localization judgments, and no overall change in binaural cue weighting. These data show that visual contextual information can invoke a reweighting of auditory localization cues, although concomitant improvements in sound localization are only likely to accompany training with fully congruent audiovisual information.

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