Changes in hemoglobin concentration in the lateral occipital regions during shape recognition: a near-infrared spectroscopy study
Maehara, Goro, Taya, Shuichiro and Kojima, Haruyuki (2007) Changes in hemoglobin concentration in the lateral occipital regions during shape recognition: a near-infrared spectroscopy study. Journal of Biomedical Optics, 12, (6), 062109-[8pp]. (doi:10.1117/1.2815720).
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Description/Abstract
By using near-infrared spectroscopy (NIRS), we measured the changes in the oxygenated and deoxygenated hemoglobin (oxy-Hb and deoxy-Hb, respectively) concentrations while performing visual tasks. We conducted experiments using two tasks: a shape recognition task and a position recognition task. It was found that the oxy-Hb concentration was substantially higher in the lateral occipital regions during shape recognition than during position recognition. The changes in the oxy-Hb concentration were considered to reflect the activation difference between the two tasks. No difference was observed in the oxy-Hb concentration during the memorization of shape and memorization of position. The deoxy-Hb concentration was different between the two tasks only when different stimuli were used but not when identical stimuli were used. In addition, it was suggested that the deoxy-Hb concentration is more sensitive to activation difference between the hemispheres and the activation at some regions. Measurements of the oxy-Hb and deoxy-Hb concentrations would reflect different aspects of cortical activations. The present results showed that measuring the oxy-Hb and deoxy-Hb concentrations separately can differentiate the activation of the regional cortical functions.
| Item Type: | Article |
|---|---|
| ISSNs: | 1083-3668 (print) |
| Related URLs: | |
| Subjects: | Q Science > QP Physiology B Philosophy. Psychology. Religion > BF Psychology |
| Divisions: | University Structure - Pre August 2011 > School of Psychology > Division of Cognition |
| Item ID: | 50347 |
| Date Deposited: | 20 Feb 2008 |
| Last Modified: | 01 Jun 2011 02:27 |
| Contributors: | Maehara, Goro (Author) Taya, Shuichiro (Author) Kojima, Haruyuki (Author) |
| Date: | November 2007 |
| Status: | Published |
| Contact Email Address: | s.taya@soton.ac.uk |
| URI: | http://eprints.soton.ac.uk/id/eprint/50347 |
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