EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Different analysis of frequency and amplitude modulations of a continuous tone in the human auditory cortex a neuromagnetic study


Hearing Research 27(3): 257-264
Different analysis of frequency and amplitude modulations of a continuous tone in the human auditory cortex a neuromagnetic study
We have measured auditory evoked magnetic fields to intermittent frequency and amplitude modulations of (FMs and AMs) of a continuous tone in 6 healthy humans. The stimuli were presented in pairs separated by 500 ms in four different combinations (FM-AM, FM-FM, AM-FM and AM-AM). Both modulations elicited neuromagnetic responses of similar waveforms: the largest deflection, N100m (magnetic counterpart of the electric N100), was preceded by a low amplitude P60m and followed by P200m. For stimuli of different types, the decrease of N100m from the first to the second reponse was less than expected from the recovery cycle of the responses, estimated from the pairs of similar stimuli. We interpret these results as evidence for different processing of amplitude and frequency modulations in the auditory pathways up to the level of supratemporal auditory cortex.

Accession: 005151863

PMID: 3610854

DOI: 10.1016/0378-5955(87)90007-4

Download PDF Full Text: Different analysis of frequency and amplitude modulations of a continuous tone in the human auditory cortex a neuromagnetic study



Related references

Neuromagnetic measurements of hemispheric differences in auditory processing of frequency and amplitude modulations. Society for Neuroscience Abstracts 20(1-2): 325, 1994

Processing of sinusoidal modulations of amplitude and frequency in the auditory cortex of alert rhesus macaques. Society for Neuroscience Abstracts 26(1-2): Abstract No -358 18, 2000

Neural representations of sinusoidal amplitude and frequency modulations in the primary auditory cortex of awake primates. Journal of Neurophysiology 87(5): 2237-2261, 2002

Sustained selective attention to competing amplitude-modulations in human auditory cortex. Plos One 9(9): E108045-E108045, 2015

Sound-level-dependent representation of frequency modulations in human auditory cortex: a low-noise fMRI study. Journal of Neurophysiology 87(1): 423-433, 2002

Neuromagnetic responses of the human auditory cortex to short frequency glides. Neuroscience Letters 121(1-2): 43-46, 1991

Hemispheric differences in processing tone frequency and amplitude modulations. Neuroreport 10(14): 3081-3086, 1999

Contra- and ipsilateral auditory stimuli produce different activation patterns at the human auditory cortex. A neuromagnetic study. Pflugers Archiv 412(1-2): 12-16, 1988

Contralateral and ipsilateral auditory stimuli produce different activation patterns at the human auditory cortex a neuromagnetic study. Pfluegers Archiv European Journal of Physiology 412(1-2): 12-16, 1988

Repetition of complex frequency-modulated sweeps enhances neuromagnetic responses in the human auditory cortex. Hearing Research 282(1-2): 216-224, 2012