Tags

Type your tag names separated by a space and hit enter

Neuromagnetic auditory steady-state responses to amplitude modulated sounds following dichotic or monaural presentation.
Clin Neurophysiol. 2010 Feb; 121(2):200-7.CN

Abstract

OBJECTIVE

The goal of the present study was to further our understanding of how attention directed to carrier frequency changes in amplitude-modulated tones (AM) affects the auditory steady-state response (ASSR).

METHODS

ASSR in the 40-Hz range were recorded in 15 adults using the frequency tagging method while subjects detected a carrier frequency change in amplitude-modulated tones. Spectral and temporal domain analyses were performed to examine the effect on response amplitudes during attending to the tones compared to ignoring them for both monaural and dichotic stimulations.

RESULTS

Larger responses were found in the hemisphere contralateral to the stimulated ear. Binaural suppression for ipsilateral input was found in both hemispheres. Time series of the source waveforms were calculated from equivalent current dipoles and showed a 2Hz beat for the dichotic presentation. Attention to carrier frequency change was significant only during dichotic presentation where larger right hemisphere responses were found at the onset of carrier change.

CONCLUSIONS

Attending to carrier frequency change in stimulation enhances the right hemisphere ASSR amplitude for dichotic stimulation.

SIGNIFICANCE

The possibility of tagging frequency specific responses up to auditory cortex makes the ASSR approach interesting for studying hearing impairment mechanisms, integrity of auditory structures and attention.

Authors+Show Affiliations

Centre de Recherche en Neuropsychologie et Cognition, Université de Montréal, Canada.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

20005163

Citation

Lazzouni, Latifa, et al. "Neuromagnetic Auditory Steady-state Responses to Amplitude Modulated Sounds Following Dichotic or Monaural Presentation." Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology, vol. 121, no. 2, 2010, pp. 200-7.
Lazzouni L, Ross B, Voss P, et al. Neuromagnetic auditory steady-state responses to amplitude modulated sounds following dichotic or monaural presentation. Clin Neurophysiol. 2010;121(2):200-7.
Lazzouni, L., Ross, B., Voss, P., & Lepore, F. (2010). Neuromagnetic auditory steady-state responses to amplitude modulated sounds following dichotic or monaural presentation. Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology, 121(2), 200-7. https://doi.org/10.1016/j.clinph.2009.11.004
Lazzouni L, et al. Neuromagnetic Auditory Steady-state Responses to Amplitude Modulated Sounds Following Dichotic or Monaural Presentation. Clin Neurophysiol. 2010;121(2):200-7. PubMed PMID: 20005163.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Neuromagnetic auditory steady-state responses to amplitude modulated sounds following dichotic or monaural presentation. AU - Lazzouni,Latifa, AU - Ross,Bernhard, AU - Voss,Patrice, AU - Lepore,Franco, Y1 - 2009/12/11/ PY - 2008/09/05/received PY - 2009/10/27/revised PY - 2009/11/03/accepted PY - 2009/12/17/entrez PY - 2009/12/17/pubmed PY - 2010/3/10/medline SP - 200 EP - 7 JF - Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology JO - Clin Neurophysiol VL - 121 IS - 2 N2 - OBJECTIVE: The goal of the present study was to further our understanding of how attention directed to carrier frequency changes in amplitude-modulated tones (AM) affects the auditory steady-state response (ASSR). METHODS: ASSR in the 40-Hz range were recorded in 15 adults using the frequency tagging method while subjects detected a carrier frequency change in amplitude-modulated tones. Spectral and temporal domain analyses were performed to examine the effect on response amplitudes during attending to the tones compared to ignoring them for both monaural and dichotic stimulations. RESULTS: Larger responses were found in the hemisphere contralateral to the stimulated ear. Binaural suppression for ipsilateral input was found in both hemispheres. Time series of the source waveforms were calculated from equivalent current dipoles and showed a 2Hz beat for the dichotic presentation. Attention to carrier frequency change was significant only during dichotic presentation where larger right hemisphere responses were found at the onset of carrier change. CONCLUSIONS: Attending to carrier frequency change in stimulation enhances the right hemisphere ASSR amplitude for dichotic stimulation. SIGNIFICANCE: The possibility of tagging frequency specific responses up to auditory cortex makes the ASSR approach interesting for studying hearing impairment mechanisms, integrity of auditory structures and attention. SN - 1872-8952 UR - https://www.unboundmedicine.com/medline/citation/20005163/Neuromagnetic_auditory_steady_state_responses_to_amplitude_modulated_sounds_following_dichotic_or_monaural_presentation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1388-2457(09)00639-7 DB - PRIME DP - Unbound Medicine ER -