This study sought to clarify differences in brain activation during the motor cognition by direct... more This study sought to clarify differences in brain activation during the motor cognition by directing subjects' voluntary attention toward an internal or external focus in response to verbal instructions. [Subjects] The subjects were eight right-handed healthy adults. [Methods] The study sought to verify differences in brain activation using functional near-infrared spectroscopy (fNIRS). [Results] A significant increase in oxygenated hemoglobin in the right prefrontal cortex and right parietal region was seen when voluntary attention was directed toward an internal focus with the right hand, and a similar increase in the left prefrontal cortex and left parietal region was seen when voluntary attention was directed toward an external focus with the left hand. [Conclusion] The results suggest that during motor cognition, functional differences of the right and left cerebral hemispheres are present in the form of lateralization in the same cerebral hemispheres as the movements. That is, the right fronto-parietal region takes charge when voluntary attention is directed toward an internal focus with the right hand, while the left fronto-parietal region does so when voluntary attention is directed toward an external focus with the left hand.
Habituation to pain has been addressed in many recent studies. It is clear that patients with chr... more Habituation to pain has been addressed in many recent studies. It is clear that patients with chronic pain do not become habituated to the pain; however, little is known about habituation to the inner experience of pain. We investigated the brain mechanisms underlying habituation to the inner experience of pain by using event-related potentials (ERPs), which provide superior temporal resolu tion, and low-resolution brain electromagnetic tomography (LORETA), which enables identification of regions of nervous activity. Fifteen healthy subjects participated in this study. The subjects were shown 4 sets of photographic images, with each set shown 30 times. The images Keywords Habituation；Chronic pain；EEG
This study sought to clarify differences in brain activation during the motor cognition by direct... more This study sought to clarify differences in brain activation during the motor cognition by directing subjects' voluntary attention toward an internal or external focus in response to verbal instructions. [Subjects] The subjects were eight right-handed healthy adults. [Methods] The study sought to verify differences in brain activation using functional near-infrared spectroscopy (fNIRS). [Results] A significant increase in oxygenated hemoglobin in the right prefrontal cortex and right parietal region was seen when voluntary attention was directed toward an internal focus with the right hand, and a similar increase in the left prefrontal cortex and left parietal region was seen when voluntary attention was directed toward an external focus with the left hand. [Conclusion] The results suggest that during motor cognition, functional differences of the right and left cerebral hemispheres are present in the form of lateralization in the same cerebral hemispheres as the movements. That is, the right fronto-parietal region takes charge when voluntary attention is directed toward an internal focus with the right hand, while the left fronto-parietal region does so when voluntary attention is directed toward an external focus with the left hand.
Habituation to pain has been addressed in many recent studies. It is clear that patients with chr... more Habituation to pain has been addressed in many recent studies. It is clear that patients with chronic pain do not become habituated to the pain; however, little is known about habituation to the inner experience of pain. We investigated the brain mechanisms underlying habituation to the inner experience of pain by using event-related potentials (ERPs), which provide superior temporal resolu tion, and low-resolution brain electromagnetic tomography (LORETA), which enables identification of regions of nervous activity. Fifteen healthy subjects participated in this study. The subjects were shown 4 sets of photographic images, with each set shown 30 times. The images Keywords Habituation；Chronic pain；EEG
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