Abstract
Behavioral, anatomical, and physiological approaches can be integrated
in the study of sound localization in barn owls. Space representation
in owls provides a useful example for discussion of place and ensemble
coding. Selectivity for space is broad and ambiguous in low-order
neurons. Parallel pathways for binaural cues and for different frequency
bands converge on high-order space-specific neurons, which encode
space more precisely. An ensemble of broadly tuned place-coding neurons
may converge on a single high-order neuron to create an improved
labeled line. Thus, the two coding schemes are not alternate methods.
Owls can localize sounds by using either the isomorphic map of auditory
space in the midbrain or forebrain neural networks in which space
is not mapped.
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