[Results of a functional magnetic resonance study of the primary auditory cortex (I): general characteristics and individual outcomes]. / Resultados en el estudio del córtex auditivo mediante resonancia magnética funcional (I): características generales y resultados individuales.
Acta Otorrinolaringol Esp
; 60(3): 160-8, 2009.
Article
em Es
| MEDLINE
| ID: mdl-19558901
ABSTRACT
OBJECTIVE:
To demonstrate and investigate the activation patterns of the primary auditory cortex (Heschl's gyrus) using functional magnetic resonance imaging (fMRI). MATERIAL ANDMETHODS:
Pure tone stimuli at 750 Hz and 2000 Hz were delivered to the right and left ear of 32 normal-hearing volunteers (18-49 years old) in 20-second on-off cycles. The fMRI data were obtained using a 1.5 Tesla scanner and processed with SPM2.RESULTS:
For both tone frequencies, bilateral hemispheric activation was identified in the transverse temporal gyrus (Heschl's gyrus) in 29 subjects (90.62 %) in response to pure tone stimuli with a probability level of p < 0.001. For monaural stimulation, bilateral hemispheric activation was observed with generally greater extent of activation in the Heschl's gyrus (HG) contralateral to the stimulated ear.CONCLUSIONS:
These results demonstrate that fMRI is a useful imaging technique to investigate the auditory cortex. The contralateral auditory cortex is more responsive than the ipsilateral cortex to tones presented monaurally.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Córtex Auditivo
/
Imageamento por Ressonância Magnética
Tipo de estudo:
Prognostic_studies
Limite:
Adolescent
/
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
Es
Ano de publicação:
2009
Tipo de documento:
Article