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Broad cortical activation in response to tactile stimulation in newborns. | LitMetric

Broad cortical activation in response to tactile stimulation in newborns.

Neuroreport

ERATO Okanoya Emotional Information Project, Japan Science and Technology Agency, Saitama, Japan.

Published: April 2012

AI Article Synopsis

Article Abstract

Tactile sensation, which is one of the earliest developing sensory systems, is very important in the perception of an individual's body and the surrounding physical environment, especially in newborns. However, currently, only little is known about the response of a newborn's brain to tactile sensation. The objective of the present study was to determine the response of a newborn's brain to tactile sensation and to compare the brain responses to various sensory stimuli. Ten healthy newborns, 2-9 days after birth, were enrolled. A multichannel near-infrared spectroscopy system was used to measure brain responses. The probe array covered broad cortical areas, including the parietal, temporal, and occipital areas. We measured cortical hemodynamic changes in response to three different types of stimuli: tactile, auditory, and visual. Activated areas were analyzed by t-tests, and the number of activated channels among the three different stimuli was compared by χ²-tests. The results showed that when the brain responded to each type of stimulation, the corresponding primary sensory area was activated, and tactile stimuli induced broader areas of brain activation than the other two types of stimuli (auditory or visual). Thus, broad brain areas, including the temporal and parietal areas, were activated by tactile stimuli in early newborn periods. These results suggest that there are differences in newborns' reactions to various types of sensory stimuli, which may reflect the importance of tactile sensation in the early newborn period.

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http://dx.doi.org/10.1097/WNR.0b013e3283520296DOI Listing

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