Whole-Head Child MEG System and Its Applications
Whole-head magnetoencephalography (MEG) systems to study cognitive processing in young children have recently been developed. The child MEG system has a helmet-shaped sensor array designed to fit child-sized heads. The sensor array comprises 64 or more LTS-SQUID axial-type gradiometric magnetometers with a baseline length of 50 mm, arranged about 100 mm from the center of the child’s head. The sensor array is installed in a helmet of a horizontal dewar with a head circumference of about 530 mm, which was determined on the basis of a preliminary investigation on the standard size of preschool children’s heads. In this chapter, the details of the child MEG system and its applications to auditory brain functions such as language acquisition are described.
KeywordsMagnetoencephalography MEG SQUID Child MEG Auditory evoked field Brain connectivity Language acquisition Brain development
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