Localization of hemodynamic responses to simple visual stimulation: an fNIRS study

Sobanawartiny Wijeakumar; Uma Shahani; William Simpson; Daphne McCulloch

doi:10.1167/iovs.11-8680

Localization of hemodynamic responses to simple visual stimulation: an fNIRS study

Sobanawartiny Wijeakumar, Uma Shahani, William Simpson, Daphne McCulloch

Vision Sciences

Research output: Contribution to journal › Article › peer-review

Abstract

The purpose of the study was to use functional near infrared spectroscopy (fNIRS) to explore the extent of activation in occipito-parietal cortices to high-contrast checkerboard stimuli. The distribution of oxyhaemoglobin (HbO), de-oxyhaemoglobin (Hb) and total haemoglobin (THb) concentrations were used as measures of cortical activation. Methods: Data were collected sequentially using the Frequency Domain Multi-Distance (FDMD) oximeter to record absolute chromophore concentration. Responses to three presentation modes: static, pattern-reversal and ON/OFF stimulation, were compared over 15 locations in two participants. The most effective stimulus was used in 10 participants at the most responsive occipito-parietal sites.

Original language	English
Pages (from-to)	2266-2273
Number of pages	8
Journal	Investigative Ophthalmology and Visual Science
Volume	53
Issue number	4
DOIs	https://doi.org/10.1167/iovs.11-8680
Publication status	Published - Apr 2012

Keywords

fNIRS
visual cortex
vision sciences

Documents and Links

10.1167/iovs.11-8680

http://www.iovs.org/content/53/4/2266

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title = "Localization of hemodynamic responses to simple visual stimulation: an fNIRS study",

abstract = "The purpose of the study was to use functional near infrared spectroscopy (fNIRS) to explore the extent of activation in occipito-parietal cortices to high-contrast checkerboard stimuli. The distribution of oxyhaemoglobin (HbO), de-oxyhaemoglobin (Hb) and total haemoglobin (THb) concentrations were used as measures of cortical activation. Methods: Data were collected sequentially using the Frequency Domain Multi-Distance (FDMD) oximeter to record absolute chromophore concentration. Responses to three presentation modes: static, pattern-reversal and ON/OFF stimulation, were compared over 15 locations in two participants. The most effective stimulus was used in 10 participants at the most responsive occipito-parietal sites. ",

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author = "Sobanawartiny Wijeakumar and Uma Shahani and William Simpson and Daphne McCulloch",

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AU - Wijeakumar, Sobanawartiny

AU - Shahani, Uma

AU - Simpson, William

AU - McCulloch, Daphne

PY - 2012/4

Y1 - 2012/4

N2 - The purpose of the study was to use functional near infrared spectroscopy (fNIRS) to explore the extent of activation in occipito-parietal cortices to high-contrast checkerboard stimuli. The distribution of oxyhaemoglobin (HbO), de-oxyhaemoglobin (Hb) and total haemoglobin (THb) concentrations were used as measures of cortical activation. Methods: Data were collected sequentially using the Frequency Domain Multi-Distance (FDMD) oximeter to record absolute chromophore concentration. Responses to three presentation modes: static, pattern-reversal and ON/OFF stimulation, were compared over 15 locations in two participants. The most effective stimulus was used in 10 participants at the most responsive occipito-parietal sites.

AB - The purpose of the study was to use functional near infrared spectroscopy (fNIRS) to explore the extent of activation in occipito-parietal cortices to high-contrast checkerboard stimuli. The distribution of oxyhaemoglobin (HbO), de-oxyhaemoglobin (Hb) and total haemoglobin (THb) concentrations were used as measures of cortical activation. Methods: Data were collected sequentially using the Frequency Domain Multi-Distance (FDMD) oximeter to record absolute chromophore concentration. Responses to three presentation modes: static, pattern-reversal and ON/OFF stimulation, were compared over 15 locations in two participants. The most effective stimulus was used in 10 participants at the most responsive occipito-parietal sites.

KW - fNIRS

KW - visual cortex

KW - vision sciences

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DO - 10.1167/iovs.11-8680

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JO - Investigative Ophthalmology & Visual Science

JF - Investigative Ophthalmology & Visual Science

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