Primitive auditory stream segregation: A neurophysiological study in the songbird forebrain. Bee, M. A & Klump, G. M J Neurophysiol, 92(2):1088-104, 2004.
doi  abstract   bibtex   
Auditory stream segregation refers to the perceptual grouping of sounds, to form coherent representations of objects in the acoustic scene, and is a fundamental aspect of hearing and speech perception. The perceptual segregation of simple interleaved tone sequences has been studied in humans and European starlings (Sturnus vulgaris) using sequences of 2 alternating tones differing in frequency (ABA-ABA-ABA-...). The segregation of A and B tones into separate auditory streams is believed to be promoted by preattentive auditory processes that increase the separation of excitation patterns along a tonotopic gradient. We tested the hypothesis that frequency selectivity and forward masking operate as 2 preattentive processes in sequential stream segregation by recording neural responses in the auditory forebrain of awake starlings to repeated ABA- sequences in which we varied the frequency separation (DeltaF) between the A and B tones and the tone repetition time (TRT). The A tones were presented at the neurons' characteristic frequency (CF), and B tones differed from the CF over a one-octave range. Larger DeltaF values and shorter TRTs promote the perceptual segregation of alternating tone sequences in humans and also resulted in larger differences in neural responses to alternating CF (A) and non-CF (B) tones. Our results are consistent with the hypothesis that preattentive auditory processes, such as frequency selectivity and forward masking, contribute to the perceptual segregation of sequential acoustic events having different frequencies into separate auditory streams, but also suggest that additional processes may be required to account for all known perceptual effects related to sequential auditory stream segregation.
@Article{Bee2004,
  author   = {Mark A Bee and Georg M Klump},
  journal  = {J Neurophysiol},
  title    = {Primitive auditory stream segregation: {A} neurophysiological study in the songbird forebrain.},
  year     = {2004},
  number   = {2},
  pages    = {1088-104},
  volume   = {92},
  abstract = {Auditory stream segregation refers to the perceptual grouping of sounds,
	to form coherent representations of objects in the acoustic scene,
	and is a fundamental aspect of hearing and speech perception. The
	perceptual segregation of simple interleaved tone sequences has been
	studied in humans and European starlings (Sturnus vulgaris) using
	sequences of 2 alternating tones differing in frequency (ABA-ABA-ABA-...).
	The segregation of A and B tones into separate auditory streams is
	believed to be promoted by preattentive auditory processes that increase
	the separation of excitation patterns along a tonotopic gradient.
	We tested the hypothesis that frequency selectivity and forward masking
	operate as 2 preattentive processes in sequential stream segregation
	by recording neural responses in the auditory forebrain of awake
	starlings to repeated ABA- sequences in which we varied the frequency
	separation (DeltaF) between the A and B tones and the tone repetition
	time (TRT). The A tones were presented at the neurons' characteristic
	frequency (CF), and B tones differed from the CF over a one-octave
	range. Larger DeltaF values and shorter TRTs promote the perceptual
	segregation of alternating tone sequences in humans and also resulted
	in larger differences in neural responses to alternating CF (A) and
	non-CF (B) tones. Our results are consistent with the hypothesis
	that preattentive auditory processes, such as frequency selectivity
	and forward masking, contribute to the perceptual segregation of
	sequential acoustic events having different frequencies into separate
	auditory streams, but also suggest that additional processes may
	be required to account for all known perceptual effects related to
	sequential auditory stream segregation.},
  doi      = {10.1152/jn.00884.2003},
  keywords = {Animals, Attention, Brain, Decision Making, Face, Female, Haplorhini, Housing, Humans, Magnetic Resonance Imaging, Male, Models, Neurological, Pattern Recognition, Visual, Photic Stimulation, Prefrontal Cortex, Research Support, Non-U.S. Gov't, U.S. Gov't, P.H.S., Visual Perception, Choice Behavior, Cognition, Dopamine, Learning, Schizophrenia, Substance-Related Disorders, Generalization (Psychology), Motor Skills, Non-P.H.S., Nerve Net, Neuronal Plasticity, Perception, Cerebral Cortex, Memory, Neurons, Sound Localization, Synapses, Synaptic Transmission, Neural Pathways, Non-, Acoustic Stimulation, Adult, Age of Onset, Aging, Blindness, Child, Preschool, Infant, Newborn, Pitch Perception, Analysis of Variance, Animal Welfare, Laboratory, Behavior, Animal, Hybridization, Genetic, Maze Learning, Mice, Inbred C57BL, Inbred DBA, Phenotype, Reproducibility of Results, Darkness, Deafness, Finches, Sleep, Sound, Sunlight, Time Factors, Vocalization, Energy Metabolism, Evolution, Fossils, History, Ancient, Hominidae, Biological, Physical Endurance, Running, Skeleton, Walking, Acoustics, Auditory Perception, Cues, Discrimination Learning, Pair Bond, Social Behavior, Songbirds, Adolescent, England, Habituation (Psychophysiology), Korea, Language, Semantics, Vocabulary, Action Potentials, Hippocampus, Pyramidal Cells, Rats, Rotation, Australia, Brachyura, Cooperative Behavior, Logistic Models, Territoriality, Africa, Archaeology, Emigration and Immigration, Europe, Geography, Phylogeny, Population Dynamics, Animal Migration, Columbidae, Discrimination (Psychology), Earth (Planet), Magnetics, Olfactory Nerve, Orientation, Physical Stimulation, Smell, Trigeminal Nerve, Body Constitution, Bone and Bones, Indonesia, Skull, Tooth, Fear, Predatory Behavior, Sciuridae, Ultrasonics, Auditory Pathways, Perceptual Masking, Prosencephalon, 15044521},
}
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