Auditory stream segregation in monkey auditory cortex: effects of frequency separation, presentation rate, and tone duration

2004 ◽  
Vol 116 (3) ◽  
pp. 1656-1670 ◽  
Author(s):  
Yonatan I. Fishman ◽  
Joseph C. Arezzo ◽  
Mitchell Steinschneider
Keyword(s):  
Auditory Cortex ◽  
Presentation Rate ◽  
Stream Segregation ◽  
Frequency Separation ◽  
Tone Duration ◽  
Auditory Stream ◽  
Auditory Stream Segregation

Auditory stream segregation relying on timbre involves left auditory cortex

Neuroreport ◽  
2004 ◽  
Vol 15 (9) ◽  
pp. 1511-1514 ◽  
Author(s):  
Susann Deike ◽  
Birgit Gaschler-Markefski ◽  
André Brechmann ◽  
Henning Scheich
Keyword(s):  
Auditory Cortex ◽  
Stream Segregation ◽  
Auditory Stream ◽  
Auditory Stream Segregation

The Intraparietal Sulcus and Perceptual Organization

2005 ◽  
Vol 17 (4) ◽  
pp. 641-651 ◽  
Author(s):  
Rhodri Cusack
Keyword(s):  
Auditory Cortex ◽  
Perceptual Organization ◽  
Stream Segregation ◽  
Intraparietal Sulcus ◽  
Neural Basis ◽  
General Role ◽  
Auditory Stream ◽  
Auditory Stream Segregation ◽  
Clinical Interest ◽  
Physical Changes

The structuring of the sensory scene (perceptual organization) profoundly affects what we perceive, and is of increasing clinical interest. In both vision and audition, many cues have been identified that influence perceptual organization, but only a little is known about its neural basis. Previous studies have suggested that auditory cortex may play a role in auditory perceptual organization (also called auditory stream segregation). However, these studies were limited in that they just examined auditory cortex and that the stimuli they used to generate different organizations had different physical characteristics, which per se may have led to the differences in neural response. In the current study, functional magnetic resonance imaging was used to test for an effect of perceptual organization across the whole brain. To avoid confounding physical changes to the stimuli with differences in perceptual organization, we exploited an ambiguous auditory figure that is sometimes perceived as a single auditory stream and sometimes as two streams. We found that regions in the intraparietal sulcus (IPS) showed greater activity when 2 streams were perceived rather than 1. The specific involvement of this region in perceptual organization is exciting, as there is a growing literature that suggests a role for the IPS in binding in vision, touch, and cross-modally. This evidence is discussed, and a general role proposed for regions of the IPS in structuring sensory input.

Neural correlates of auditory stream segregation in primary auditory cortex of the awake monkey

2001 ◽  
Vol 151 (1-2) ◽  
pp. 167-187 ◽  
Author(s):  
Yonatan I. Fishman ◽  
David H. Reser ◽  
Joseph C. Arezzo ◽  
Mitchell Steinschneider
Keyword(s):  
Auditory Cortex ◽  
Primary Auditory Cortex ◽  
Neural Correlates ◽  
Stream Segregation ◽  
Auditory Stream ◽  
Auditory Stream Segregation ◽  
Awake Monkey

Stream Segregation and Peripheral Channeling

1991 ◽  
Vol 9 (2) ◽  
pp. 155-183 ◽  
Author(s):  
William Morris Hartmann ◽  
Douglas Johnson
Keyword(s):  
Elementary Mathematics ◽  
Stream Segregation ◽  
Secondary Effect ◽  
Tone Duration ◽  
Identification Task ◽  
Auditory Periphery ◽  
Auditory Stream ◽  
Auditory Stream Segregation ◽  
Simple Rules ◽  
Different Sources

Two interleaved melodies, with theory tones alternating as ABAB..., can be individually followed and identified if auditory stream segregation takes place. Stream segregation can occur if the tone conditions are favorable, for example, if the tones of the different melodies are in different octaves. Using an interleaved melody identification task, we have measured the extent to which 12 different tone conditions lead to stream segregation. The purpose of the experiment is to discover whether stream segregation is mediated entirely by channeling that is established in the auditory periphery or whether more complicated principles of source grouping are at work. Peripheral channels are defined as either tonotopic (frequency based) or lateral (localized left or right). The data show that peripheral channeling is of paramount importance, suggesting that a set of rather simple rules can predict whether two interleaved melodies will be perceived as segregated or not. The data reveal a secondary effect of tone duration. Otherwise, in the absence of peripheral channeling, the experiments find little or no stream segregation, even in those cases where individual tones should clearly evoke images of different sources. Additional experiments show that interleaved melody identification is made more difficult by a transposition that maximizes the number of melodic crossings, even though the transposition may place the interleaved melodies in different keys. An appendix develops an elementary mathematics of melodic crossings and contacts.

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