Auditory responsive cortex in the squirrel monkey: neural responses to amplitude-modulated sounds

Bieser, A.; Müller-Preuß, P.

doi:10.1007/bf00228100

Cited by 167 publications

(161 citation statements)

References 20 publications

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“…The difference between the two auditory cortex regions was just above significance ( p ϭ 0.058). This suggests that the temporal coding strategies used by these two areas are quite different, a finding that is in good agreement with previous results (Bieser and Müller-Preuss, 1996;Bieser, 1998).…”

Section: An Auditory Region In the Insulasupporting

confidence: 92%

“…These findings not only extend previous recordings in the insula which relied on simplistic stimuli (Pribram et al, 1954;Sudakov et al, 1971;Bieser and Müller-Preuss, 1996;Bieser, 1998) but are also in good agreement with results from human imaging and lesion studies, which implicate the insula in the processing of complex sounds and speech (Augustine, 1985;Bamiou et al, 2003). Given the structural similarity of the insula and auditory pathways across humans and monkeys, our findings have direct implications on the mechanisms operating in the human brain (Hackett et al, 2001;Chiry et al, 2003;Sweet et al, 2005;Ghazanfar, 2008).…”

Section: An Auditory Region In the Insulasupporting

confidence: 90%

“…Both types of stimuli were presented as pseudo-random sequences of 8 repeats, with individual stimulus duration of 50 ms and pauses of 80 ms. In this way these stimuli are reminiscent of amplitude modulated tones or noise, which are known to drive auditory neurons (Bieser and Müller-Preuss, 1996;Liang et al, 2002). Pure tones (15 frequencies) ranged from 125 Hz to 16 kHz in half-octave steps and the band-passed noise (7 bands, one octave width) covered the same frequency range.…”

Section: Methodsmentioning

confidence: 99%

“…Sudakov et al (1971) reported neurons in the squirrel monkey's insula responding to simple acoustic stimuli such as clicks, and Bieser (1998) and Bieser and Müller-Preuss (1996) used amplitude modulated tones to test insula neurons. While these results provide a glimpse on the processing of insula neurons, no neurophysiological study tested the encoding of natural sounds or communication sounds.…”

Section: Introductionmentioning

confidence: 99%

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An Auditory Region in the Primate Insular Cortex Responding Preferentially to Vocal Communication Sounds

Remedios¹,

Logothetis²,

Kayser³

2009

J. Neurosci.

131

100

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Human imaging studies implicate the insular cortex in processing complex sounds and vocal communication signals such as speech. In addition, lesions of the insula often manifest as deficits in sound or speech recognition (auditory agnosia) and speech production. While models of acoustic perception assign an important role to the insula, little is known about the underlying neuronal substrate. Studying a vocal primate, we identified a predominantly auditory region in the caudal insula and therein discovered a neural representation of conspecific communication sounds. When probed with natural sounds, insula neurons exhibited higher response selectivity than neurons in auditory cortex, and in contrast to these, responded preferentially to conspecific vocalizations. Importantly, insula neurons not only preferred conspecific vocalizations over a wide range of environmental sounds and other animal vocalizations, but also over acoustically manipulated versions of these, demonstrating that this preference for vocalizations arises both from spectral and temporal features of the sounds. In addition, individual insula neurons responded highly selectively to only a few vocalizations and allowed the decoding of sound identity from single-trial responses. These findings characterize the caudal insula as a selectively responding auditory region, possibly part of a processing stream involved in the representation of communication sounds. Importantly, our results provide a neural counterpart for the human imaging and lesion findings and uncover a basis for a supposed role of the insula in processing vocal communication sounds such as speech.

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Section: An Auditory Region In the Insulasupporting

confidence: 92%

Section: An Auditory Region In the Insulasupporting

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Auditory Region in the Primate Insular Cortex Responding Preferentially to Vocal Communication Sounds

Remedios¹,

Logothetis²,

Kayser³

2009

J. Neurosci.

131

100

View full text Add to dashboard Cite

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“…However, Lu et al (2001) showed that a distinct population of neurons exists in the auditory cortex of marmosets that encodes highmodulation frequencies as a rate code. A rate code for highmodulation frequencies in the auditory cortex was also reported in other studies (Bieser and Muller-Preuss, 1996;Liang et al, 2002;Lu and Wang, 2004). Our current results suggest that neurons in the auditory cortex of P. discolor represent IR roughness as a rate code.…”

Section: Discussionsupporting

confidence: 89%

A Neural Correlate of Stochastic Echo Imaging

Firzlaff¹,

Schörnich²,

Hoffmann

et al. 2006

J. Neurosci.

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Bats quickly navigate through a highly structured environment relying on echolocation. Large natural objects in the environment, like bushes or trees, produce complex stochastic echoes, which can be characterized by the echo roughness. Previous work has shown that bats can use echo roughness to classify the stochastic properties of natural objects. This study provides both psychophysical and electrophysiological data to identify a neural correlate of statistical echo analysis in the bat Phyllostomus discolor. Psychophysical results show that the bats require a fixed minimum roughness of 2.5 (in units of base 10 logarithm of the stimulus fourth moment) for roughness discrimination. Electrophysiological results reveal a subpopulation of 15 of 94 recorded cortical units, located in an anterior region of auditory cortex, whose rate responses changed significantly with echo roughness. It is shown that the behavioral ability to discriminate differences in the statistics of complex echoes can be quantitatively predicted by the neural responses of this subpopulation of auditorycortical neurons.

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Corticostriatal connections of the superior temporal region in rhesus monkeys

1998

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Corticostriatal connections of auditory areas within the supratemporal plane and in rostral and caudal portions of the superior temporal gyrus were studied by the autoradiographic anterograde tracing technique. The results show that the primary auditory cortex has limited projections to the caudoventral putamen and to the tail of the caudate nucleus. In contrast, the second auditory area within the circular sulcus has connections to the rostral and the caudal putamen and to the body of the caudate nucleus and the tail. The association areas of the superior temporal gyrus collectively have widespread corticostriatal projections characterized by differential topographic distributions. The rostral part of the gyrus projects to ventral portions of the head of the caudate nucleus and of the body and to the tail. In addition, there are connections to rostroventral and caudoventral portions of the putamen. The mid-portion of the gyrus projects to similar striatal regions, but the connections to the head of the caudate nucleus are less extensive. Compared with the rostral and middle parts of the superior temporal gyrus, the caudal portion has little connectivity to the tail of the caudate nucleus. It projects more dorsally within the head and the body and also more dorsally within the caudal putamen. These differential patterns of corticostriatal connectivity are consistent with functional specialization at the cortical level.

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Auditory responsive cortex in the squirrel monkey: neural responses to amplitude-modulated sounds

Cited by 167 publications

References 20 publications

An Auditory Region in the Primate Insular Cortex Responding Preferentially to Vocal Communication Sounds

An Auditory Region in the Primate Insular Cortex Responding Preferentially to Vocal Communication Sounds

A Neural Correlate of Stochastic Echo Imaging

Corticostriatal connections of the superior temporal region in rhesus monkeys

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