Coding space-time stimulus dynamics in auditory brain maps

Yunyan Wang, Yoram Gutfreund, Jose L. Pena

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Sensory maps are often distorted representations of the environment, where ethologically-important ranges are magnified. The implication of a biased representation extends beyond increased acuity for having more neurons dedicated to a certain range. Because neurons are functionally interconnected, non-uniform representations influence the processing of high-order features that rely on comparison across areas of the map. Among these features are time-dependent changes of the auditory scene generated by moving objects. How sensory representation affects high order processing can be approached in the map of auditory space of the owl's midbrain, where locations in the front are over-represented. In this map, neurons are selective not only to location but also to location over time. The tuning to space over time leads to direction selectivity, which is also topographically organized. Across the population, neurons tuned to peripheral space are more selective to sounds moving into the front. The distribution of direction selectivity can be explained by spatial and temporal integration on the non-uniform map of space. Thus, the representation of space can induce biased computation of a second-order stimulus feature. This phenomenon is likely observed in other sensory maps and may be relevant for behavior.

Original languageEnglish (US)
Article numberArticle 135
JournalFrontiers in Physiology
Volume5 APR
DOIs
StatePublished - 2014

Fingerprint

Neurons
Brain
Strigiformes
Mesencephalon
Population
Direction compound

Keywords

  • Acoustic motion
  • Adaptation
  • Center-surround
  • Direction selectivity
  • Maps
  • Sound localization

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

Cite this

Coding space-time stimulus dynamics in auditory brain maps. / Wang, Yunyan; Gutfreund, Yoram; Pena, Jose L.

In: Frontiers in Physiology, Vol. 5 APR, Article 135, 2014.

Research output: Contribution to journalArticle

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