Speech Representation in the Auditory Nerve and Ventral Cochlear Nucleus

May, Brad; Prell, Glenn S. Le; Hienz, Robert D.; Sachs, Murray B.

doi:10.1007/978-1-4419-8712-9_38

Cited by 4 publications

(5 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reason, of course, is that the fibres are mostly responding to F1, which does not change between these two stimuli. May et al (1996) obtained a similar result for discrimination of the F2 frequency using a different method in which a model was fitted to the rate responses to vowels and d 0 was computed from the model. The model is based on data like those to be discussed later in figure 9.…”

Section: Inferences From Discrimination Datamentioning

confidence: 72%

“…The model is based on data like those to be discussed later in figure 9. They also measured the behavioural jnd for F2 frequency in cats May et al 1996), and showed that the jnd predicted for one optimally chosen AN fibre is very close to the behavioural jnd. 'Optimally chosen' means a fibre with a BF at the peak of the rate difference plot.…”

Section: Inferences From Discrimination Datamentioning

confidence: 81%

“…However, the scatter in the discharge rates (figure 5b) and the small size of the rate differences as F2 approaches F1 (figure 5c) suggest that it would be profitable to quantify this impression. One approach is to measure the change in discharge rate as F2 changes and to compute from the rate changes the detectability of changes in F2 frequency for various stimuli (Conley & Keilson 1995;May et al 1996;Miller et al 1999b). Figure 6b shows rate differences between responses to variants of /3/ with F2Z1.4 and 2 kHz, plotted versus BF.…”

Section: Inferences From Discrimination Datamentioning

confidence: 99%

“…For the AN data, the vowel was shifted to seven positions relative to BF, as in (a); for the cochlear nucleus neurons, only three positions were used (F1, T1 and F2). Adapted with permission from May et al (1997)). feature level.…”

Section: Changes In the Neural Represen-tation Of Spectral Shape In The Cochlear Nucleusmentioning

confidence: 99%

See 3 more Smart Citations

Neural representation of spectral and temporal information in speech

Young

2007

Phil. Trans. R. Soc. B

View full text Add to dashboard Cite

Speech is the most interesting and one of the most complex sounds dealt with by the auditory system. The neural representation of speech needs to capture those features of the signal on which the brain depends in language communication. Here we describe the representation of speech in the auditory nerve and in a few sites in the central nervous system from the perspective of the neural coding of important aspects of the signal. The representation is tonotopic, meaning that the speech signal is decomposed by frequency and different frequency components are represented in different populations of neurons. Essential to the representation are the properties of frequency tuning and nonlinear suppression. Tuning creates the decomposition of the signal by frequency, and nonlinear suppression is essential for maintaining the representation across sound levels. The representation changes in central auditory neurons by becoming more robust against changes in stimulus intensity and more transient. However, it is probable that the form of the representation at the auditory cortex is fundamentally different from that at lower levels, in that stimulus features other than the distribution of energy across frequency are analysed.

show abstract

Section: Inferences From Discrimination Datamentioning

confidence: 72%

Section: Inferences From Discrimination Datamentioning

confidence: 81%

Section: Inferences From Discrimination Datamentioning

confidence: 99%

Section: Changes In the Neural Represen-tation Of Spectral Shape In The Cochlear Nucleusmentioning

confidence: 99%

See 2 more Smart Citations

Neural representation of spectral and temporal information in speech

Young

2007

Phil. Trans. R. Soc. B

View full text Add to dashboard Cite

show abstract

“…For example, their intrinsic membrane properties (Oertel et al, 1988) combined with the distribution of inputs on their soma and dendrites (Cant, 1981) seem to sensitize them to the firing rate of auditory nerve fibers (Young et al, 1988). Some chopper units respond over wide ranges of intensity (Rhode and Smith, 1986) even in the presence of intense background noise (May and Sachs, 1992;May et al, 1997). It seems relevant to note that birds use IIDs to detect the elevation of a sound in space and that the neural pathways subserving IID detection are composed primarily of chopper units (Sullivan and Konishi, 1984;Takahashi et al, 1984;Mogdans and Knudsen, 1994).…”

Section: Functional Considerationsmentioning

confidence: 99%

Axonal pathways to the lateral superior olive labeled with biotinylated dextran amine injections in the dorsal cochlear nucleus of rats

Doucet

Ryugo

2003

J of Comparative Neurology

View full text Add to dashboard Cite

The lateral superior olive (LSO) contains cells that are sensitive to intensity differences between the two ears, a feature used by the brain to localize sounds in space. This report describes a source of input to the LSO that complements bushy cell projections from the ventral cochlear nucleus (VCN). Injections of biotinylated dextran amine (BDA) into the dorsal cochlear nucleus (DCN) of the rat label axons and swellings in several brainstem structures, including the ipsilateral LSO. Labeling in the ipsilateral LSO was confined to a thin band that extended throughout the length of the structure such that it resembled an LSO isofrequency lamina. The source of this labeled pathway was not obvious, because DCN neurons do not project to the LSO, and VCN bushy cells were not filled by these injections. Filled neurons in several brainstem structures emerged as possible sources. Three observations suggest that most of the axonal labeling in the LSO derives from a single source. First, the number of labeled VCN planar multipolar cells and the amount of labeling in the LSO were consistent and robust across animals. In contrast, the number of labeled cells in most other structures was small and highly variable. Second, the locations of planar cells and filled axons in the LSO were related topographically to the position of the DCN injection site. Third, labeled terminal arborizations in the LSO arose from collaterals of axons in the trapezoid body (output tract of planar cells). We infer that planar multipolar cells, in addition to bushy cells, are a source of ascending input from the cochlear nucleus to the LSO.

show abstract

Neural Basis of Audition

Carney

2002

Stevens' Handbook of Experimental Psychology

View full text Add to dashboard Cite

This chapter reviews the neuroanatomy and neurophysiology of the auditory system. A brief introduction to the key acoustical parameters that are important for understanding the physiological literature is included. Responses to simple tonal stimuli and to some more complex sounds are described for several levels of the auditory pathway, from the auditory nerve to the auditory cortex . Responses of central neurons to binaural stimuli are described in the context of spatial localization. A brief description of the descending pathways is also included. Where applicable, neural responses are described in terms of both average discharge rates and temporal response properties. The influence of the nonlinear, or level‐dependent, properties of the cochlea on average‐rate and temporal responses of auditory neurons are described; these nonlinearities are an important property of the healthy inner ear and have been a major focus of recent research on the auditory system.

show abstract

Speech Representation in the Auditory Nerve and Ventral Cochlear Nucleus

Cited by 4 publications

References 30 publications

Neural representation of spectral and temporal information in speech

Neural representation of spectral and temporal information in speech

Axonal pathways to the lateral superior olive labeled with biotinylated dextran amine injections in the dorsal cochlear nucleus of rats

Neural Basis of Audition

Contact Info

Product

Resources

About