Properties of concentration changes of oxyhemoglobin and deoxyhemoglobin in the prefrontal cortex during the tasks of executive functions measured by near infrared spectroscopy

Abstract

The present study aimed to examine the properties of hemodynamics of prefrontal cortex during a task of executive function by the near infrared (NIR) topography with 24-channels. In the wide regions of prefrontal cortex, increase of [Hb] occurred and then [HbO 2] increased. In the restricted areas (2ch, 4ch, 5ch, 7ch and 10ch), responses involve only increase of [HbO 2]. The difference of these responses might reflect the distinct activities of the prefrontal cortex, which relate to the executive function.