Journal
NEUROREPORT
Volume 16, Issue 1, Pages 81-84Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00001756-200501190-00019
Keywords
auditory; fetus; magnetoencephalography; MEG; MMN; MMNm; short-term memory
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Studies in fetuses and in prematurely born infants show that auditory discriminative skills are present prior to birth. The magnetic fields generated by the fetal brain activity pass the maternal tissues and, despite their weakness, can be detected externally using MEG. Recent studies on the auditory evoked magnetic responses show that the fetal brain responds to sound onset. In contrast, higher-level auditory skills, such as those involving discriminative and memory functions, were not so far studied in fetuses with MEG. Here we show that fetal responses related to discriminating sounds can be recorded, implicating that the auditory change-detection system is functional. These results open new views to developmental neuroscience by enabling one to determine the sensory capabilities as well as the extent and accuracy of the short-term memory system Of the fetus, and, further. to follow the development of these crucial processes. (C) 2005 Lippincott Williams Wilkins.
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