Analysis of the human a-wave ERG component

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6 Citazioni (Scopus)

Abstract

The a-wave is one of the main issues of research in the field of ocular electrophysiology, since it is strictly connected with early photoreceptoral activities. The present study proposes mathematical methods that analyse this component in human subjects, and supports experimental evidence relating to possible correlations among the responses of photoreceptoral units under a light stimulus. The investigation is organized in two parts: the first part concerns the onset and the initial slope, up to the first minimum (about 10-15 ms), the second part deals with the main portion of the wave, up to about 30 ms. In both cases, the a-waves, recorded at various levels of luminance, have been fitted with a set of appropriate functions representing possible models of physiological behaviour which would take place in the early stages of phototransduction. The statistical nature of the underlying processes is also discussed. The results indicate that correlations occur in the early stages, whereas random processes are set up later.
Lingua originaleEnglish
pagine (da-a)881-899
Numero di pagine19
RivistaPhysiological Measurement
Volume27
Stato di pubblicazionePublished - 2006

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Physiology (medical)
  • Physiology

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Analysis of the human a-wave ERG component. / Anastasi, Mario; Bellomonte, Leonardo; Brai, Maria; Barraco, Rosita Maria Luisa; Bellomonte; Barraco; Brai.

In: Physiological Measurement, Vol. 27, 2006, pag. 881-899.

Risultato della ricerca: Article

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AU - Anastasi, Mario

AU - Bellomonte, Leonardo

AU - Brai, Maria

AU - Barraco, Rosita Maria Luisa

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AU - Barraco, null

AU - Brai, null

PY - 2006

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N2 - The a-wave is one of the main issues of research in the field of ocular electrophysiology, since it is strictly connected with early photoreceptoral activities. The present study proposes mathematical methods that analyse this component in human subjects, and supports experimental evidence relating to possible correlations among the responses of photoreceptoral units under a light stimulus. The investigation is organized in two parts: the first part concerns the onset and the initial slope, up to the first minimum (about 10-15 ms), the second part deals with the main portion of the wave, up to about 30 ms. In both cases, the a-waves, recorded at various levels of luminance, have been fitted with a set of appropriate functions representing possible models of physiological behaviour which would take place in the early stages of phototransduction. The statistical nature of the underlying processes is also discussed. The results indicate that correlations occur in the early stages, whereas random processes are set up later.

AB - The a-wave is one of the main issues of research in the field of ocular electrophysiology, since it is strictly connected with early photoreceptoral activities. The present study proposes mathematical methods that analyse this component in human subjects, and supports experimental evidence relating to possible correlations among the responses of photoreceptoral units under a light stimulus. The investigation is organized in two parts: the first part concerns the onset and the initial slope, up to the first minimum (about 10-15 ms), the second part deals with the main portion of the wave, up to about 30 ms. In both cases, the a-waves, recorded at various levels of luminance, have been fitted with a set of appropriate functions representing possible models of physiological behaviour which would take place in the early stages of phototransduction. The statistical nature of the underlying processes is also discussed. The results indicate that correlations occur in the early stages, whereas random processes are set up later.

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JO - Physiological Measurement

JF - Physiological Measurement

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