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Sound localization in the owl: representation and control

Sound localization in the owl: representation and control. Brain Mechanisms Student’s Choice Topics. Why the Owl. Aural predator – hunt’s with sound localization Phase locking ability -- upwards of 10 kHz Strong dependence on ITD cues over wide frequency range. ITD Coding. Optimal coding

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Sound localization in the owl: representation and control

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  1. Sound localization in the owl:representation and control Brain Mechanisms Student’s Choice Topics

  2. Why the Owl • Aural predator – hunt’s with sound localization • Phase locking ability -- upwards of 10 kHz • Strong dependence on ITD cues over wide frequency range

  3. ITD Coding Optimal coding Vs. Jeffress coincidence detection

  4. Discussion topics • ITD coding in the Inferior Colliculus • Limitations of current models • “physiologically relevant” range • Pi limit Distribution of interaural time difference in the barn owl’s inferior colliculus in low- and high-frequency ranges Wagner et al., 2007

  5. Topics • Preservation of spectrotemporal tuning between the nucleus laminairis and the inferior colliculus of the barn owl • Christianson and Pena, 2007

  6. Topics • Top-down gain control of the auditory space map by gaze control circuitry in the barn owl • Winkowski and Knudsen, 2006

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