Auditory stimulus repetition effects on cortical hemoglobin oxygenation: a near-infrared spectroscopy investigation.
Neuroreport
; 19(2): 161-5, 2008 Jan 22.
Article
en En
| MEDLINE
| ID: mdl-18185101
ABSTRACT
The cortical response to repeated sensory stimuli plateaus (or declines) as repetition frequencies increase beyond 2-8 Hz. This study examined the underlying changes in cortical oxygenated and deoxygenated hemoglobin associated with this phenomenon using near-infrared spectroscopy. The optical signal was measured from 11 healthy volunteers listening to noise-burst trains presented at 2, 10, and 35 Hz. In a bilateral region consistent with the posterior superior temporal gyrus there was an inverse relationship between deoxyhemoglobin concentration change and stimulus frequency greatest at 2 Hz, intermediate at 10 Hz, and smallest at 35 Hz. These findings provide preliminary support for a relationship between the perceptual characteristics of auditory stimuli and modulation of cortical oxygenation as measured via an emerging neuromonitoring technique.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Consumo de Oxígeno
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Corteza Auditiva
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Percepción Auditiva
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Hemoglobinas
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Circulación Cerebrovascular
Límite:
Adult
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Neuroreport
Asunto de la revista:
NEUROLOGIA
Año:
2008
Tipo del documento:
Article
País de afiliación:
Estados Unidos